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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-03-08 17:30:54 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-03-10 07:28:42 -0700 |
| commit | 97a73a0f9fbfb2be682fd037814576dbfa0e0da8 (patch) | |
| tree | 20d29a6c9b01e5f40fddb409deb4a8f2dd3f3506 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | cc20e3fec682700b673fcd286e6bef8e9da947e2 (diff) | |
io_uring: fix io_sq_offload_create error handling
Don't set IO_SQ_THREAD_SHOULD_STOP when io_sq_offload_create() has
failed on io_uring_alloc_task_context() but leave everything to
io_sq_thread_finish(), because currently io_sq_thread_finish()
hangs on trying to park it. That's great it stalls there, because
otherwise the following io_sq_thread_stop() would be skipped on
IO_SQ_THREAD_SHOULD_STOP check and the sqo would race for sqd with
freeing ctx.
A simple error injection gives something like this.
[ 245.463955] INFO: task sqpoll-test-hang:523 blocked for more than 122 seconds.
[ 245.463983] Call Trace:
[ 245.463990] __schedule+0x36b/0x950
[ 245.464005] schedule+0x68/0xe0
[ 245.464013] schedule_timeout+0x209/0x2a0
[ 245.464032] wait_for_completion+0x8b/0xf0
[ 245.464043] io_sq_thread_finish+0x44/0x1a0
[ 245.464049] io_uring_setup+0x9ea/0xc80
[ 245.464058] __x64_sys_io_uring_setup+0x16/0x20
[ 245.464064] do_syscall_64+0x38/0x50
[ 245.464073] entry_SYSCALL_64_after_hwframe+0x44/0xae
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions