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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-03-06 12:02:18 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-03-07 22:12:43 +0100 |
| commit | 678eeba481d8c161203382832a4379d507050aed (patch) | |
| tree | 4edfcde6eb9417bc9d25b0ec93cd71cae79c83be /fs | |
| parent | io_uring: cancel reqs of all iowq's on ring exit (diff) | |
| download | linux-678eeba481d8c161203382832a4379d507050aed.tar.xz linux-678eeba481d8c161203382832a4379d507050aed.zip | |
io-wq: warn on creating manager while exiting
Add a simple warning making sure that nobody tries to create a new
manager while we're under IO_WQ_BIT_EXIT. That can potentially happen
due to racy work submission after final put.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/io-wq.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c index 1bfdb86336e4..1ab9324e602f 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -774,6 +774,8 @@ static int io_wq_fork_manager(struct io_wq *wq) if (wq->manager) return 0; + WARN_ON_ONCE(test_bit(IO_WQ_BIT_EXIT, &wq->state)); + init_completion(&wq->worker_done); atomic_set(&wq->worker_refs, 1); tsk = create_io_thread(io_wq_manager, wq, NUMA_NO_NODE); |