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Merge tag 'io_uring-5.12-2021-03-19' of git://git.kernel.dk/linux-block

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Pull io_uring fixes from Jens Axboe:
 "Quieter week this time, which was both expected and desired. About
  half of the below is fixes for this release, the other half are just
  fixes in general. In detail:

   - Fix the freezing of IO threads, by making the freezer not send them
     fake signals. Make them freezable by default.

   - Like we did for personalities, move the buffer IDR to xarray. Kills
     some code and avoids a use-after-free on teardown.

   - SQPOLL cleanups and fixes (Pavel)

   - Fix linked timeout race (Pavel)

   - Fix potential completion post use-after-free (Pavel)

   - Cleanup and move internal structures outside of general kernel view
     (Stefan)

   - Use MSG_SIGNAL for send/recv from io_uring (Stefan)"

* tag 'io_uring-5.12-2021-03-19' of git://git.kernel.dk/linux-block:
  io_uring: don't leak creds on SQO attach error
  io_uring: use typesafe pointers in io_uring_task
  io_uring: remove structures from include/linux/io_uring.h
  io_uring: imply MSG_NOSIGNAL for send[msg]()/recv[msg]() calls
  io_uring: fix sqpoll cancellation via task_work
  io_uring: add generic callback_head helpers
  io_uring: fix concurrent parking
  io_uring: halt SQO submission on ctx exit
  io_uring: replace sqd rw_semaphore with mutex
  io_uring: fix complete_post use ctx after free
  io_uring: fix ->flags races by linked timeouts
  io_uring: convert io_buffer_idr to XArray
  io_uring: allow IO worker threads to be frozen
  kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing
This commit is contained in:
Linus Torvalds
2021-03-19 17:01:09 -07:00
parent ecd8ee7f9c de75a3d3f5
commit 0ada2dad8b
6 changed files with 142 additions and 130 deletions
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1
kernel/fork.c
View File

@@ -2444,7 +2444,6 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node)
if (!IS_ERR(tsk)) {
sigfillset(&tsk->blocked);
sigdelsetmask(&tsk->blocked, sigmask(SIGKILL));
tsk->flags |= PF_NOFREEZE;
}
return tsk;
}

2
kernel/freezer.c
View File

@@ -134,7 +134,7 @@ bool freeze_task(struct task_struct *p)
return false;
}
if (!(p->flags & PF_KTHREAD))
if (!(p->flags & (PF_KTHREAD | PF_IO_WORKER)))
fake_signal_wake_up(p);
else
wake_up_state(p, TASK_INTERRUPTIBLE);