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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-01-26 15:28:26 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-01-26 08:51:08 -0700 |
| commit | a1bb3cd58913338e1b627ea6b8c03c2ae82d293f (patch) | |
| tree | 7d5dc5a5fbf032bfd7fedc1179a1fd3ec4c6797e /fs/io_uring.c | |
| parent | b18032bb0a883cd7edd22a7fe6c57e1059b81ed0 (diff) | |
| download | linux-a1bb3cd58913338e1b627ea6b8c03c2ae82d293f.tar.bz2 | |
io_uring: fix __io_uring_files_cancel() with TASK_UNINTERRUPTIBLE
If the tctx inflight number haven't changed because of cancellation,
__io_uring_task_cancel() will continue leaving the task in
TASK_UNINTERRUPTIBLE state, that's not expected by
__io_uring_files_cancel(). Ensure we always call finish_wait() before
retrying.
Cc: stable@vger.kernel.org # 5.9+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 2166c469789d..09aada153a71 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -9124,16 +9124,15 @@ void __io_uring_task_cancel(void) prepare_to_wait(&tctx->wait, &wait, TASK_UNINTERRUPTIBLE); /* - * If we've seen completions, retry. This avoids a race where - * a completion comes in before we did prepare_to_wait(). + * If we've seen completions, retry without waiting. This + * avoids a race where a completion comes in before we did + * prepare_to_wait(). */ - if (inflight != tctx_inflight(tctx)) - continue; - schedule(); + if (inflight == tctx_inflight(tctx)) + schedule(); finish_wait(&tctx->wait, &wait); } while (1); - finish_wait(&tctx->wait, &wait); atomic_dec(&tctx->in_idle); io_uring_remove_task_files(tctx); |