Jens Axboe a0d45c3f59 io_uring/fdinfo: remove need for sqpoll lock for thread/pid retrieval ... A previous commit added a trylock for getting the SQPOLL thread info via fdinfo, but this introduced a regression where we often fail to get it if the thread is busy. For that case, we end up not printing the current CPU and PID info. Rather than rely on this lock, just print the pid we already stored in the io_sq_data struct, and ensure we update the current CPU every time we've slept or potentially rescheduled. The latter won't potentially be 100% accurate, but that wasn't the case before either as the task can get migrated at any time unless it has been pinned at creation time. We retain keeping the io_sq_data dereference inside the ctx->uring_lock, as it has always been, as destruction of the thread and data happen below that. We could make this RCU safe, but there's little point in doing that. With this, we always print the last valid information we had, rather than have spurious outputs with missing information. Fixes: 7644b1a1c9 ("io_uring/fdinfo: lock SQ thread while retrieving thread cpu/pid") Signed-off-by: Jens Axboe <axboe@kernel.dk>		2023-11-15 06:35:46 -07:00
..
advise.c	io_uring: always go async for unsupported fadvise flags	2023-01-29 15:18:26 -07:00
advise.h
alloc_cache.h	io_uring/rsrc: consolidate node caching	2023-04-12 12:09:41 -06:00
cancel.c	io_uring: add support for futex wake and wait	2023-09-29 02:36:57 -06:00
cancel.h	io_uring: add support for futex wake and wait	2023-09-29 02:36:57 -06:00
epoll.c	io_uring: undeprecate epoll_ctl support	2023-05-26 20:22:41 -06:00
epoll.h
fdinfo.c	io_uring/fdinfo: remove need for sqpoll lock for thread/pid retrieval	2023-11-15 06:35:46 -07:00
fdinfo.h
filetable.c	io_uring: add helpers to decode the fixed file file_ptr	2023-06-20 09:36:22 -06:00
filetable.h	io_uring: add helpers to decode the fixed file file_ptr	2023-06-20 09:36:22 -06:00
fs.c	io_uring/fs: remove sqe->rw_flags checking from LINKAT	2023-09-29 03:07:09 -06:00
fs.h
futex.c	io_uring: add support for vectored futex waits	2023-09-29 02:37:08 -06:00
futex.h	io_uring: add support for vectored futex waits	2023-09-29 02:37:08 -06:00
io_uring.c	io_uring-futex-2023-10-30	2023-11-01 11:25:08 -10:00
io_uring.h	for-6.7/io_uring-2023-10-30	2023-11-01 11:09:19 -10:00
io-wq.c	io-wq: fully initialize wqe before calling cpuhp_state_add_instance_nocalls()	2023-10-05 14:11:18 -06:00
io-wq.h	io_uring: break out of iowq iopoll on teardown	2023-09-07 09:02:27 -06:00
kbuf.c	io_uring: indicate if io_kbuf_recycle did recycle anything	2023-11-06 13:41:58 -07:00
kbuf.h	io_uring: indicate if io_kbuf_recycle did recycle anything	2023-11-06 13:41:58 -07:00
Makefile	io_uring: add support for futex wake and wait	2023-09-29 02:36:57 -06:00
msg_ring.c	io_uring: use io_file_from_index in io_msg_grab_file	2023-06-20 09:36:22 -06:00
msg_ring.h	io_uring: get rid of double locking	2022-12-07 06:47:13 -07:00
net.c	io_uring/net: ensure socket is marked connected on connect retry	2023-11-03 13:25:50 -06:00
net.h	io_uring: Add KASAN support for alloc_caches	2023-04-03 07:16:14 -06:00
nop.c
nop.h
notif.c	io_uring/notif: add constant for ubuf_info flags	2023-04-15 14:21:04 -06:00
notif.h	io_uring/notif: add constant for ubuf_info flags	2023-04-15 14:21:04 -06:00
opdef.c	io_uring/rw: add separate prep handler for fixed read/write	2023-11-06 07:43:16 -07:00
opdef.h	io_uring/rw: mark readv/writev as vectored in the opcode definition	2023-09-21 12:00:46 -06:00
openclose.c	io_uring: use files_lookup_fd_locked()	2023-10-19 11:02:49 +02:00
openclose.h
poll.c	io_uring/poll: use IOU_F_TWQ_LAZY_WAKE for wakeups	2023-10-19 06:42:29 -06:00
poll.h	io_uring: avoid indirect function calls for the hottest task_work	2023-06-02 08:55:37 -06:00
refs.h
rsrc.c	io_uring/rsrc: cleanup io_pin_pages()	2023-10-02 18:25:23 -06:00
rsrc.h	io_uring/rsrc: Annotate struct io_mapped_ubuf with __counted_by	2023-08-17 19:14:47 -06:00
rw.c	io_uring: do not clamp read length for multishot read	2023-11-06 13:41:58 -07:00
rw.h	io_uring/rw: add separate prep handler for fixed read/write	2023-11-06 07:43:16 -07:00
slist.h	io_uring: silence variable ‘prev’ set but not used warning	2023-03-09 10:10:58 -07:00
splice.c	io_uring/splice: use fput() directly	2023-08-10 10:24:25 -06:00
splice.h
sqpoll.c	io_uring/fdinfo: remove need for sqpoll lock for thread/pid retrieval	2023-11-15 06:35:46 -07:00
sqpoll.h	io_uring/sqpoll: fix io-wq affinity when IORING_SETUP_SQPOLL is used	2023-08-16 13:40:28 -06:00
statx.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
statx.h
sync.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
sync.h
tctx.c	io_uring: Add io_uring_setup flag to pre-register ring fd and never install it	2023-05-16 08:06:00 -06:00
tctx.h	io_uring: simplify __io_uring_add_tctx_node	2022-10-07 12:25:30 -06:00
timeout.c	io_uring: never overflow io_aux_cqe	2023-08-11 10:42:57 -06:00
timeout.h	io_uring: remove unused return from io_disarm_next	2022-09-21 13:15:01 -06:00
uring_cmd.c	io_uring/cmd: Introduce SOCKET_URING_OP_SETSOCKOPT	2023-10-19 16:42:03 -06:00
uring_cmd.h	io_uring: Remove unnecessary BUILD_BUG_ON	2023-05-04 08:19:05 -06:00
waitid.c	io_uring: add IORING_OP_WAITID support	2023-09-21 12:04:45 -06:00
waitid.h	io_uring: add IORING_OP_WAITID support	2023-09-21 12:04:45 -06:00
xattr.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
xattr.h