website-struct

Struct: io_ring_ctx

Status

Regular

• In 4.4: Absent ⚠️
• In 4.8: Absent ⚠️
• In 4.10: Absent ⚠️
• In 4.13: Absent ⚠️
• In 4.15: Absent ⚠️
• In 4.18: Absent ⚠️
• In 5.0: Absent ⚠️
• In 5.3: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      struct io_sq_ring *sq_ring;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct workqueue_struct *sqo_wq;
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      struct io_cq_ring *cq_ring;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In 5.4: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In 5.8: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      unsigned int compat;
      unsigned int account_mem;
      unsigned int cq_overflow_flushed;
      unsigned int drain_next;
      unsigned int eventfd_async;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      atomic_t cached_cq_overflow;
      long unsigned int sq_check_overflow;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct list_head cq_overflow_list;
      wait_queue_head_t inflight_wait;
      struct io_uring_sqe *sq_sqes;
      struct io_rings *rings;
      struct io_wq *io_wq;
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct fixed_file_data *file_data;
      unsigned int nr_user_files;
      int ring_fd;
      struct file *ring_file;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ref_comp;
      struct completion sq_thread_comp;
      struct io_kiocb *fallback_req;
      struct socket *ring_sock;
      struct idr io_buffer_idr;
      struct idr personality_idr;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      unsigned int cq_mask;
      atomic_t cq_timeouts;
      long unsigned int cq_check_overflow;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      struct list_head poll_list;
      struct hlist_head *cancel_hash;
      unsigned int cancel_hash_bits;
      bool poll_multi_file;
      spinlock_t inflight_lock;
      struct list_head inflight_list;
      struct delayed_work file_put_work;
      struct llist_head file_put_llist;
      struct work_struct exit_work;
  };
  

• In 5.11: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      unsigned int compat;
      unsigned int limit_mem;
      unsigned int cq_overflow_flushed;
      unsigned int drain_next;
      unsigned int eventfd_async;
      unsigned int restricted;
      unsigned int sqo_dead;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      unsigned int cached_cq_overflow;
      long unsigned int sq_check_overflow;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct list_head cq_overflow_list;
      struct io_uring_sqe *sq_sqes;
      struct io_rings *rings;
      struct io_wq *io_wq;
      struct task_struct *sqo_task;
      struct mm_struct *mm_account;
      struct cgroup_subsys_state *sqo_blkcg_css;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      struct fixed_file_data *file_data;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      kuid_t loginuid;
      unsigned int sessionid;
      struct completion ref_comp;
      struct completion sq_thread_comp;
      struct io_kiocb *fallback_req;
      struct socket *ring_sock;
      struct idr io_buffer_idr;
      struct idr personality_idr;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      unsigned int cq_mask;
      atomic_t cq_timeouts;
      unsigned int cq_last_tm_flush;
      long unsigned int cq_check_overflow;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      struct list_head iopoll_list;
      struct hlist_head *cancel_hash;
      unsigned int cancel_hash_bits;
      bool poll_multi_file;
      spinlock_t inflight_lock;
      struct list_head inflight_list;
      struct delayed_work file_put_work;
      struct llist_head file_put_llist;
      struct work_struct exit_work;
      struct io_restriction restrictions;
  };
  

• In 5.13: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      unsigned int compat;
      unsigned int drain_next;
      unsigned int eventfd_async;
      unsigned int restricted;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      unsigned int cached_cq_overflow;
      long unsigned int sq_check_overflow;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct list_head cq_overflow_list;
      struct io_uring_sqe *sq_sqes;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      struct io_submit_state submit_state;
      struct list_head locked_free_list;
      unsigned int locked_free_nr;
      struct io_rings *rings;
      const struct cred *sq_creds;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      struct io_rsrc_data *file_data;
      struct io_file_table file_table;
      unsigned int nr_user_files;
      struct io_rsrc_data *buf_data;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf **user_bufs;
      struct xarray io_buffers;
      struct xarray personalities;
      u32 pers_next;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      unsigned int cq_mask;
      atomic_t cq_timeouts;
      unsigned int cq_last_tm_flush;
      unsigned int cq_extra;
      long unsigned int cq_check_overflow;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      spinlock_t completion_lock;
      struct list_head iopoll_list;
      struct hlist_head *cancel_hash;
      unsigned int cancel_hash_bits;
      bool poll_multi_file;
      struct delayed_work rsrc_put_work;
      struct llist_head rsrc_put_llist;
      struct list_head rsrc_ref_list;
      spinlock_t rsrc_ref_lock;
      struct io_rsrc_node *rsrc_node;
      struct io_rsrc_node *rsrc_backup_node;
      struct io_mapped_ubuf *dummy_ubuf;
      struct io_restriction restrictions;
      struct socket *ring_sock;
      struct io_wq_hash *hash_map;
      struct user_struct *user;
      struct mm_struct *mm_account;
      struct callback_head *exit_task_work;
      struct work_struct exit_work;
      struct list_head tctx_list;
      struct completion ref_comp;
  };
  

• In 5.15: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      struct io_rings *rings;
      unsigned int flags;
      unsigned int compat;
      unsigned int drain_next;
      unsigned int eventfd_async;
      unsigned int restricted;
      unsigned int off_timeout_used;
      unsigned int drain_active;
      struct mutex uring_lock;
      u32 *sq_array;
      struct io_uring_sqe *sq_sqes;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      struct list_head defer_list;
      struct io_rsrc_node *rsrc_node;
      struct io_file_table file_table;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf **user_bufs;
      struct io_submit_state submit_state;
      struct list_head timeout_list;
      struct list_head ltimeout_list;
      struct list_head cq_overflow_list;
      struct xarray io_buffers;
      struct xarray personalities;
      u32 pers_next;
      unsigned int sq_thread_idle;
      struct list_head locked_free_list;
      unsigned int locked_free_nr;
      const struct cred *sq_creds;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      long unsigned int check_cq_overflow;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      struct eventfd_ctx *cq_ev_fd;
      struct wait_queue_head poll_wait;
      struct wait_queue_head cq_wait;
      unsigned int cq_extra;
      atomic_t cq_timeouts;
      unsigned int cq_last_tm_flush;
      spinlock_t completion_lock;
      spinlock_t timeout_lock;
      struct list_head iopoll_list;
      struct hlist_head *cancel_hash;
      unsigned int cancel_hash_bits;
      bool poll_multi_queue;
      struct io_restriction restrictions;
      struct io_rsrc_node *rsrc_backup_node;
      struct io_mapped_ubuf *dummy_ubuf;
      struct io_rsrc_data *file_data;
      struct io_rsrc_data *buf_data;
      struct delayed_work rsrc_put_work;
      struct llist_head rsrc_put_llist;
      struct list_head rsrc_ref_list;
      spinlock_t rsrc_ref_lock;
      struct socket *ring_sock;
      struct io_wq_hash *hash_map;
      struct user_struct *user;
      struct mm_struct *mm_account;
      struct llist_head fallback_llist;
      struct delayed_work fallback_work;
      struct work_struct exit_work;
      struct list_head tctx_list;
      struct completion ref_comp;
      u32 iowq_limits[2];
      bool iowq_limits_set;
  };
  

• In 5.19: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      struct io_rings *rings;
      unsigned int flags;
      enum task_work_notify_mode notify_method;
      unsigned int compat;
      unsigned int drain_next;
      unsigned int restricted;
      unsigned int off_timeout_used;
      unsigned int drain_active;
      unsigned int drain_disabled;
      unsigned int has_evfd;
      unsigned int syscall_iopoll;
      struct mutex uring_lock;
      u32 *sq_array;
      struct io_uring_sqe *sq_sqes;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      struct list_head defer_list;
      struct io_rsrc_node *rsrc_node;
      int rsrc_cached_refs;
      atomic_t cancel_seq;
      struct io_file_table file_table;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf **user_bufs;
      struct io_submit_state submit_state;
      struct io_buffer_list *io_bl;
      struct xarray io_bl_xa;
      struct list_head io_buffers_cache;
      struct list_head timeout_list;
      struct list_head ltimeout_list;
      struct list_head cq_overflow_list;
      struct list_head apoll_cache;
      struct xarray personalities;
      u32 pers_next;
      unsigned int sq_thread_idle;
      struct io_wq_work_list locked_free_list;
      unsigned int locked_free_nr;
      const struct cred *sq_creds;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      long unsigned int check_cq;
      struct io_uring_cqe *cqe_cached;
      struct io_uring_cqe *cqe_sentinel;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      struct io_ev_fd *io_ev_fd;
      struct wait_queue_head cq_wait;
      unsigned int cq_extra;
      atomic_t cq_timeouts;
      unsigned int cq_last_tm_flush;
      spinlock_t completion_lock;
      spinlock_t timeout_lock;
      struct io_wq_work_list iopoll_list;
      struct hlist_head *cancel_hash;
      unsigned int cancel_hash_bits;
      bool poll_multi_queue;
      struct list_head io_buffers_comp;
      struct io_restriction restrictions;
      struct io_rsrc_node *rsrc_backup_node;
      struct io_mapped_ubuf *dummy_ubuf;
      struct io_rsrc_data *file_data;
      struct io_rsrc_data *buf_data;
      struct delayed_work rsrc_put_work;
      struct llist_head rsrc_put_llist;
      struct list_head rsrc_ref_list;
      spinlock_t rsrc_ref_lock;
      struct list_head io_buffers_pages;
      struct socket *ring_sock;
      struct io_wq_hash *hash_map;
      struct user_struct *user;
      struct mm_struct *mm_account;
      struct llist_head fallback_llist;
      struct delayed_work fallback_work;
      struct work_struct exit_work;
      struct list_head tctx_list;
      struct completion ref_comp;
      u32 iowq_limits[2];
      bool iowq_limits_set;
  };
  

• In 6.2: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      struct io_rings *rings;
      unsigned int flags;
      enum task_work_notify_mode notify_method;
      unsigned int compat;
      unsigned int drain_next;
      unsigned int restricted;
      unsigned int off_timeout_used;
      unsigned int drain_active;
      unsigned int drain_disabled;
      unsigned int has_evfd;
      unsigned int syscall_iopoll;
      unsigned int task_complete;
      struct mutex uring_lock;
      u32 *sq_array;
      struct io_uring_sqe *sq_sqes;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      struct io_rsrc_node *rsrc_node;
      int rsrc_cached_refs;
      atomic_t cancel_seq;
      struct io_file_table file_table;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf **user_bufs;
      struct io_submit_state submit_state;
      struct io_buffer_list *io_bl;
      struct xarray io_bl_xa;
      struct list_head io_buffers_cache;
      struct io_hash_table cancel_table_locked;
      struct list_head cq_overflow_list;
      struct io_alloc_cache apoll_cache;
      struct io_alloc_cache netmsg_cache;
      struct io_wq_work_list locked_free_list;
      unsigned int locked_free_nr;
      const struct cred *sq_creds;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      long unsigned int check_cq;
      unsigned int file_alloc_start;
      unsigned int file_alloc_end;
      struct xarray personalities;
      u32 pers_next;
      struct io_uring_cqe *cqe_cached;
      struct io_uring_cqe *cqe_sentinel;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      struct io_ev_fd *io_ev_fd;
      struct wait_queue_head cq_wait;
      unsigned int cq_extra;
      spinlock_t completion_lock;
      bool poll_multi_queue;
      struct io_wq_work_list iopoll_list;
      struct io_hash_table cancel_table;
      struct llist_head work_llist;
      struct list_head io_buffers_comp;
      spinlock_t timeout_lock;
      atomic_t cq_timeouts;
      struct list_head timeout_list;
      struct list_head ltimeout_list;
      unsigned int cq_last_tm_flush;
      struct io_restriction restrictions;
      struct task_struct *submitter_task;
      struct io_rsrc_node *rsrc_backup_node;
      struct io_mapped_ubuf *dummy_ubuf;
      struct io_rsrc_data *file_data;
      struct io_rsrc_data *buf_data;
      struct delayed_work rsrc_put_work;
      struct callback_head rsrc_put_tw;
      struct llist_head rsrc_put_llist;
      struct list_head rsrc_ref_list;
      spinlock_t rsrc_ref_lock;
      struct list_head io_buffers_pages;
      struct socket *ring_sock;
      struct io_wq_hash *hash_map;
      struct user_struct *user;
      struct mm_struct *mm_account;
      struct llist_head fallback_llist;
      struct delayed_work fallback_work;
      struct work_struct exit_work;
      struct list_head tctx_list;
      struct completion ref_comp;
      u32 iowq_limits[2];
      bool iowq_limits_set;
      struct list_head defer_list;
      unsigned int sq_thread_idle;
      unsigned int evfd_last_cq_tail;
  };
  

• In 6.5: ✅

  struct io_ring_ctx {
      unsigned int flags;
      unsigned int drain_next;
      unsigned int restricted;
      unsigned int off_timeout_used;
      unsigned int drain_active;
      unsigned int has_evfd;
      unsigned int task_complete;
      unsigned int syscall_iopoll;
      unsigned int poll_activated;
      unsigned int drain_disabled;
      unsigned int compat;
      enum task_work_notify_mode notify_method;
      short unsigned int n_ring_pages;
      short unsigned int n_sqe_pages;
      struct page **ring_pages;
      struct page **sqe_pages;
      struct io_rings *rings;
      struct task_struct *submitter_task;
      struct percpu_ref refs;
      struct mutex uring_lock;
      u32 *sq_array;
      struct io_uring_sqe *sq_sqes;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      struct io_rsrc_node *rsrc_node;
      atomic_t cancel_seq;
      struct io_file_table file_table;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf **user_bufs;
      struct io_submit_state submit_state;
      struct io_buffer_list *io_bl;
      struct xarray io_bl_xa;
      struct list_head io_buffers_cache;
      struct io_hash_table cancel_table_locked;
      struct list_head cq_overflow_list;
      struct io_alloc_cache apoll_cache;
      struct io_alloc_cache netmsg_cache;
      struct io_wq_work_list locked_free_list;
      unsigned int locked_free_nr;
      const struct cred *sq_creds;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      long unsigned int check_cq;
      unsigned int file_alloc_start;
      unsigned int file_alloc_end;
      struct xarray personalities;
      u32 pers_next;
      struct io_uring_cqe *cqe_cached;
      struct io_uring_cqe *cqe_sentinel;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      struct io_ev_fd *io_ev_fd;
      struct wait_queue_head cq_wait;
      unsigned int cq_extra;
      spinlock_t completion_lock;
      bool poll_multi_queue;
      atomic_t cq_wait_nr;
      struct io_wq_work_list iopoll_list;
      struct io_hash_table cancel_table;
      struct llist_head work_llist;
      struct list_head io_buffers_comp;
      spinlock_t timeout_lock;
      atomic_t cq_timeouts;
      struct list_head timeout_list;
      struct list_head ltimeout_list;
      unsigned int cq_last_tm_flush;
      struct wait_queue_head poll_wq;
      struct io_restriction restrictions;
      struct io_mapped_ubuf *dummy_ubuf;
      struct io_rsrc_data *file_data;
      struct io_rsrc_data *buf_data;
      struct list_head rsrc_ref_list;
      struct io_alloc_cache rsrc_node_cache;
      struct wait_queue_head rsrc_quiesce_wq;
      unsigned int rsrc_quiesce;
      struct list_head io_buffers_pages;
      struct socket *ring_sock;
      struct io_wq_hash *hash_map;
      struct user_struct *user;
      struct mm_struct *mm_account;
      struct llist_head fallback_llist;
      struct delayed_work fallback_work;
      struct work_struct exit_work;
      struct list_head tctx_list;
      struct completion ref_comp;
      u32 iowq_limits[2];
      bool iowq_limits_set;
      struct callback_head poll_wq_task_work;
      struct list_head defer_list;
      unsigned int sq_thread_idle;
      unsigned int evfd_last_cq_tail;
  };
  

• In 6.8: ✅

  struct io_ring_ctx {
      unsigned int flags;
      unsigned int drain_next;
      unsigned int restricted;
      unsigned int off_timeout_used;
      unsigned int drain_active;
      unsigned int has_evfd;
      unsigned int task_complete;
      unsigned int lockless_cq;
      unsigned int syscall_iopoll;
      unsigned int poll_activated;
      unsigned int drain_disabled;
      unsigned int compat;
      struct task_struct *submitter_task;
      struct io_rings *rings;
      struct percpu_ref refs;
      enum task_work_notify_mode notify_method;
      struct mutex uring_lock;
      u32 *sq_array;
      struct io_uring_sqe *sq_sqes;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      struct io_rsrc_node *rsrc_node;
      atomic_t cancel_seq;
      struct io_file_table file_table;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf **user_bufs;
      struct io_submit_state submit_state;
      struct io_buffer_list *io_bl;
      struct xarray io_bl_xa;
      struct io_hash_table cancel_table_locked;
      struct io_alloc_cache apoll_cache;
      struct io_alloc_cache netmsg_cache;
      struct io_wq_work_list iopoll_list;
      bool poll_multi_queue;
      struct hlist_head cancelable_uring_cmd;
      struct io_uring_cqe *cqe_cached;
      struct io_uring_cqe *cqe_sentinel;
      unsigned int cached_cq_tail;
      unsigned int cq_entries;
      struct io_ev_fd *io_ev_fd;
      unsigned int cq_extra;
      struct llist_head work_llist;
      long unsigned int check_cq;
      atomic_t cq_wait_nr;
      atomic_t cq_timeouts;
      struct wait_queue_head cq_wait;
      spinlock_t timeout_lock;
      struct list_head timeout_list;
      struct list_head ltimeout_list;
      unsigned int cq_last_tm_flush;
      struct io_uring_cqe completion_cqes[16];
      spinlock_t completion_lock;
      struct io_wq_work_list locked_free_list;
      unsigned int locked_free_nr;
      struct list_head io_buffers_comp;
      struct list_head cq_overflow_list;
      struct io_hash_table cancel_table;
      struct hlist_head waitid_list;
      struct hlist_head futex_list;
      struct io_alloc_cache futex_cache;
      const struct cred *sq_creds;
      struct io_sq_data *sq_data;
      struct wait_queue_head sqo_sq_wait;
      struct list_head sqd_list;
      unsigned int file_alloc_start;
      unsigned int file_alloc_end;
      struct xarray personalities;
      u32 pers_next;
      struct list_head io_buffers_cache;
      struct hlist_head io_buf_list;
      struct wait_queue_head poll_wq;
      struct io_restriction restrictions;
      struct io_mapped_ubuf *dummy_ubuf;
      struct io_rsrc_data *file_data;
      struct io_rsrc_data *buf_data;
      struct list_head rsrc_ref_list;
      struct io_alloc_cache rsrc_node_cache;
      struct wait_queue_head rsrc_quiesce_wq;
      unsigned int rsrc_quiesce;
      struct io_wq_hash *hash_map;
      struct user_struct *user;
      struct mm_struct *mm_account;
      struct llist_head fallback_llist;
      struct delayed_work fallback_work;
      struct work_struct exit_work;
      struct list_head tctx_list;
      struct completion ref_comp;
      u32 iowq_limits[2];
      bool iowq_limits_set;
      struct callback_head poll_wq_task_work;
      struct list_head defer_list;
      unsigned int sq_thread_idle;
      unsigned int evfd_last_cq_tail;
      short unsigned int n_ring_pages;
      short unsigned int n_sqe_pages;
      struct page **ring_pages;
      struct page **sqe_pages;
  };
  

Arch

• In arm64: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In armhf: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In ppc64el: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In riscv64: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

Flavor

• In aws: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In azure: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In gcp: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

• In lowlatency: ✅

  struct io_ring_ctx {
      struct percpu_ref refs;
      unsigned int flags;
      bool compat;
      bool account_mem;
      u32 *sq_array;
      unsigned int cached_sq_head;
      unsigned int sq_entries;
      unsigned int sq_mask;
      unsigned int sq_thread_idle;
      unsigned int cached_sq_dropped;
      struct io_uring_sqe *sq_sqes;
      struct list_head defer_list;
      struct list_head timeout_list;
      struct workqueue_struct * sqo_wq[2];
      struct task_struct *sqo_thread;
      struct mm_struct *sqo_mm;
      wait_queue_head_t sqo_wait;
      struct completion sqo_thread_started;
      unsigned int cached_cq_tail;
      atomic_t cached_cq_overflow;
      unsigned int cq_entries;
      unsigned int cq_mask;
      struct wait_queue_head cq_wait;
      struct fasync_struct *cq_fasync;
      struct eventfd_ctx *cq_ev_fd;
      atomic_t cq_timeouts;
      struct io_rings *rings;
      struct file **user_files;
      unsigned int nr_user_files;
      unsigned int nr_user_bufs;
      struct io_mapped_ubuf *user_bufs;
      struct user_struct *user;
      const struct cred *creds;
      struct completion ctx_done;
      struct mutex uring_lock;
      wait_queue_head_t wait;
      spinlock_t completion_lock;
      bool poll_multi_file;
      struct list_head poll_list;
      struct list_head cancel_list;
      struct async_list pending_async[2];
      struct socket *ring_sock;
  };
  

Differences

Regular

• Changed between 5.3 and 5.4 ⚠️

  • Field added. u32 *sq_array
  • Field added. unsigned int cached_sq_dropped
  • Field added. struct list_head timeout_list
  • Field added. atomic_t cached_cq_overflow
  • Field added. atomic_t cq_timeouts
  • Field added. struct io_rings *rings
  • Field added. const struct cred *creds
  • Field removed. struct io_sq_ring *sq_ring
  • Field removed. struct io_cq_ring *cq_ring
  • Field type changed. struct workqueue_struct *sqo_wq ➡️ struct workqueue_struct * sqo_wq[2]
• Changed between 5.4 and 5.8 ⚠️

  • Field added. unsigned int cq_overflow_flushed
  • Field added. unsigned int drain_next
  • Field added. unsigned int eventfd_async
  • Field added. long unsigned int sq_check_overflow
  • Field added. struct list_head cq_overflow_list
  • Field added. wait_queue_head_t inflight_wait
  • Field added. struct io_wq *io_wq
  • Field added. struct fixed_file_data *file_data
  • Field added. int ring_fd
  • Field added. struct file *ring_file
  • Field added. struct completion ref_comp
  • Field added. struct completion sq_thread_comp
  • Field added. struct io_kiocb *fallback_req
  • Field added. struct idr io_buffer_idr
  • Field added. struct idr personality_idr
  • Field added. long unsigned int cq_check_overflow
  • Field added. struct hlist_head *cancel_hash
  • Field added. unsigned int cancel_hash_bits
  • Field added. spinlock_t inflight_lock
  • Field added. struct list_head inflight_list
  • Field added. struct delayed_work file_put_work
  • Field added. struct llist_head file_put_llist
  • Field added. struct work_struct exit_work
  • Field removed. struct workqueue_struct * sqo_wq[2]
  • Field removed. struct completion sqo_thread_started
  • Field removed. struct file **user_files
  • Field removed. struct completion ctx_done
  • Field removed. struct list_head cancel_list
  • Field removed. struct async_list pending_async[2]
  • Field type changed. bool compat ➡️ unsigned int compat
  • Field type changed. bool account_mem ➡️ unsigned int account_mem
• Changed between 5.8 and 5.11 ⚠️

  • Field added. unsigned int limit_mem
  • Field added. unsigned int restricted
  • Field added. unsigned int sqo_dead
  • Field added. struct task_struct *sqo_task
  • Field added. struct mm_struct *mm_account
  • Field added. struct cgroup_subsys_state *sqo_blkcg_css
  • Field added. struct io_sq_data *sq_data
  • Field added. struct wait_queue_head sqo_sq_wait
  • Field added. struct list_head sqd_list
  • Field added. kuid_t loginuid
  • Field added. unsigned int sessionid
  • Field added. unsigned int cq_last_tm_flush
  • Field added. struct list_head iopoll_list
  • Field added. struct io_restriction restrictions
  • Field removed. unsigned int account_mem
  • Field removed. wait_queue_head_t inflight_wait
  • Field removed. struct task_struct *sqo_thread
  • Field removed. struct mm_struct *sqo_mm
  • Field removed. wait_queue_head_t sqo_wait
  • Field removed. int ring_fd
  • Field removed. struct file *ring_file
  • Field removed. struct list_head poll_list
  • Field type changed. atomic_t cached_cq_overflow ➡️ unsigned int cached_cq_overflow
• Changed between 5.11 and 5.13 ⚠️

  • Field added. struct io_submit_state submit_state
  • Field added. struct list_head locked_free_list
  • Field added. unsigned int locked_free_nr
  • Field added. const struct cred *sq_creds
  • Field added. struct io_file_table file_table
  • Field added. struct io_rsrc_data *buf_data
  • Field added. struct xarray io_buffers
  • Field added. struct xarray personalities
  • Field added. u32 pers_next
  • Field added. unsigned int cq_extra
  • Field added. struct delayed_work rsrc_put_work
  • Field added. struct llist_head rsrc_put_llist
  • Field added. struct list_head rsrc_ref_list
  • Field added. spinlock_t rsrc_ref_lock
  • Field added. struct io_rsrc_node *rsrc_node
  • Field added. struct io_rsrc_node *rsrc_backup_node
  • Field added. struct io_mapped_ubuf *dummy_ubuf
  • Field added. struct io_wq_hash *hash_map
  • Field added. struct callback_head *exit_task_work
  • Field added. struct list_head tctx_list
  • Field removed. unsigned int limit_mem
  • Field removed. unsigned int cq_overflow_flushed
  • Field removed. unsigned int sqo_dead
  • Field removed. struct io_wq *io_wq
  • Field removed. struct task_struct *sqo_task
  • Field removed. struct cgroup_subsys_state *sqo_blkcg_css
  • Field removed. const struct cred *creds
  • Field removed. kuid_t loginuid
  • Field removed. unsigned int sessionid
  • Field removed. struct completion sq_thread_comp
  • Field removed. struct io_kiocb *fallback_req
  • Field removed. struct idr io_buffer_idr
  • Field removed. struct idr personality_idr
  • Field removed. spinlock_t inflight_lock
  • Field removed. struct list_head inflight_list
  • Field removed. struct delayed_work file_put_work
  • Field removed. struct llist_head file_put_llist
  • Field type changed. struct fixed_file_data *file_data ➡️ struct io_rsrc_data *file_data
  • Field type changed. struct io_mapped_ubuf *user_bufs ➡️ struct io_mapped_ubuf **user_bufs
• Changed between 5.13 and 5.15 ⚠️

  • Field added. unsigned int off_timeout_used
  • Field added. unsigned int drain_active
  • Field added. struct list_head ltimeout_list
  • Field added. long unsigned int check_cq_overflow
  • Field added. struct wait_queue_head poll_wait
  • Field added. spinlock_t timeout_lock
  • Field added. bool poll_multi_queue
  • Field added. struct llist_head fallback_llist
  • Field added. struct delayed_work fallback_work
  • Field added. u32 iowq_limits[2]
  • Field added. bool iowq_limits_set
  • Field removed. unsigned int sq_mask
  • Field removed. unsigned int cached_sq_dropped
  • Field removed. unsigned int cached_cq_overflow
  • Field removed. long unsigned int sq_check_overflow
  • Field removed. wait_queue_head_t wait
  • Field removed. unsigned int cq_mask
  • Field removed. long unsigned int cq_check_overflow
  • Field removed. struct fasync_struct *cq_fasync
  • Field removed. bool poll_multi_file
  • Field removed. struct callback_head *exit_task_work
• Changed between 5.15 and 5.19 ⚠️

  • Field added. enum task_work_notify_mode notify_method
  • Field added. unsigned int drain_disabled
  • Field added. unsigned int has_evfd
  • Field added. unsigned int syscall_iopoll
  • Field added. int rsrc_cached_refs
  • Field added. atomic_t cancel_seq
  • Field added. struct io_buffer_list *io_bl
  • Field added. struct xarray io_bl_xa
  • Field added. struct list_head io_buffers_cache
  • Field added. struct list_head apoll_cache
  • Field added. long unsigned int check_cq
  • Field added. struct io_uring_cqe *cqe_cached
  • Field added. struct io_uring_cqe *cqe_sentinel
  • Field added. struct io_ev_fd *io_ev_fd
  • Field added. struct list_head io_buffers_comp
  • Field added. struct list_head io_buffers_pages
  • Field removed. unsigned int eventfd_async
  • Field removed. struct xarray io_buffers
  • Field removed. long unsigned int check_cq_overflow
  • Field removed. struct eventfd_ctx *cq_ev_fd
  • Field removed. struct wait_queue_head poll_wait
  • Field type changed. struct list_head locked_free_list ➡️ struct io_wq_work_list locked_free_list
  • Field type changed. struct list_head iopoll_list ➡️ struct io_wq_work_list iopoll_list
• Changed between 5.19 and 6.2 ⚠️

  • Field added. unsigned int task_complete
  • Field added. struct io_hash_table cancel_table_locked
  • Field added. struct io_alloc_cache netmsg_cache
  • Field added. unsigned int file_alloc_start
  • Field added. unsigned int file_alloc_end
  • Field added. struct io_hash_table cancel_table
  • Field added. struct llist_head work_llist
  • Field added. struct task_struct *submitter_task
  • Field added. struct callback_head rsrc_put_tw
  • Field added. unsigned int evfd_last_cq_tail
  • Field removed. struct hlist_head *cancel_hash
  • Field removed. unsigned int cancel_hash_bits
  • Field type changed. struct list_head apoll_cache ➡️ struct io_alloc_cache apoll_cache
• Changed between 6.2 and 6.5 ⚠️

  • Field added. unsigned int poll_activated
  • Field added. short unsigned int n_ring_pages
  • Field added. short unsigned int n_sqe_pages
  • Field added. struct page **ring_pages
  • Field added. struct page **sqe_pages
  • Field added. atomic_t cq_wait_nr
  • Field added. struct wait_queue_head poll_wq
  • Field added. struct io_alloc_cache rsrc_node_cache
  • Field added. struct wait_queue_head rsrc_quiesce_wq
  • Field added. unsigned int rsrc_quiesce
  • Field added. struct callback_head poll_wq_task_work
  • Field removed. int rsrc_cached_refs
  • Field removed. struct io_rsrc_node *rsrc_backup_node
  • Field removed. struct delayed_work rsrc_put_work
  • Field removed. struct callback_head rsrc_put_tw
  • Field removed. struct llist_head rsrc_put_llist
  • Field removed. spinlock_t rsrc_ref_lock
• Changed between 6.5 and 6.8 ⚠️

  • Field added. unsigned int lockless_cq
  • Field added. struct hlist_head cancelable_uring_cmd
  • Field added. struct io_uring_cqe completion_cqes[16]
  • Field added. struct hlist_head waitid_list
  • Field added. struct hlist_head futex_list
  • Field added. struct io_alloc_cache futex_cache
  • Field added. struct hlist_head io_buf_list
  • Field removed. struct list_head io_buffers_pages
  • Field removed. struct socket *ring_sock

Arch

• No changes between amd64 and arm64 ✅
• No changes between amd64 and armhf ✅
• No changes between amd64 and ppc64el ✅
• No changes between amd64 and riscv64 ✅

Flavor

• No changes between generic and aws ✅
• No changes between generic and azure ✅
• No changes between generic and gcp ✅
• No changes between generic and lowlatency ✅