Li Chen 38aa434ab9 io_uring/io-wq: add exit-on-idle state ...

io-wq uses an idle timeout to shrink the pool, but keeps the last worker
around indefinitely to avoid churn.

For tasks that used io_uring for file I/O and then stop using io_uring,
this can leave an iou-wrk-* thread behind even after all io_uring
instances are gone. This is unnecessary overhead and also gets in the
way of process checkpoint/restore.

Add an exit-on-idle state that makes all io-wq workers exit as soon as
they become idle, and provide io_wq_set_exit_on_idle() to toggle it.

Signed-off-by: Li Chen <me@linux.beauty>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2026-02-02 08:10:23 -07:00

..

advise.c

io_uring: finish IOU_OK -> IOU_COMPLETE transition

2025-05-21 08:41:16 -06:00

advise.h

…

alloc_cache.c

io_uring: add alloc_cache.c

2025-01-28 15:10:40 -07:00

alloc_cache.h

io_uring: Trim out unused includes

2026-01-05 17:08:20 -07:00

cancel.c

io_uring: split out CQ waiting code into wait.c

2026-01-22 09:21:16 -07:00

cancel.h

io_uring/cancel: move cancelation code from io_uring.c to cancel.c

2025-11-04 09:32:09 -07:00

cmd_net.c

Merge tag 'for-6.19/io_uring-20251201' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

2025-12-03 18:58:57 -08:00

epoll.c

io_uring: finish IOU_OK -> IOU_COMPLETE transition

2025-05-21 08:41:16 -06:00

epoll.h

io_uring/epoll: add support for IORING_OP_EPOLL_WAIT

2025-02-20 07:59:56 -07:00

eventfd.c

io_uring/eventfd: open code io_eventfd_grab()

2025-04-24 08:33:54 -06:00

eventfd.h

io_uring/eventfd: dedup signalling helpers

2025-04-24 08:33:54 -06:00

fdinfo.c

Merge branch 'io_uring-6.18' into for-6.19/io_uring

2025-11-13 07:26:37 -07:00

fdinfo.h

…

filetable.c

io_uring: correct __must_hold annotation in io_install_fixed_file

2025-10-23 07:25:07 -06:00

filetable.h

io_uring: Trim out unused includes

2026-01-05 17:08:20 -07:00

fs.c

io_uring: finish IOU_OK -> IOU_COMPLETE transition

2025-05-21 08:41:16 -06:00

fs.h

…

futex.c

io_uring/futex: use GFP_KERNEL_ACCOUNT for futex data allocation

2026-01-25 10:07:09 -07:00

futex.h

io_uring: move cancelations to be io_uring_task based

2024-11-06 13:55:38 -07:00

io_uring.c

io_uring: fix bad indentation for setup flags if statement

2026-01-23 05:09:08 -07:00

io_uring.h

io_uring: introduce non-circular SQ

2026-01-22 15:47:23 -07:00

io-wq.c

io_uring/io-wq: add exit-on-idle state

2026-02-02 08:10:23 -07:00

io-wq.h

io_uring/io-wq: add exit-on-idle state

2026-02-02 08:10:23 -07:00

kbuf.c

io_uring/kbuf: use WRITE_ONCE() for userspace-shared buffer ring fields

2025-12-05 09:52:02 -07:00

kbuf.h

io_uring/kbuf: remove obsolete buf_nr_pages and update comments

2025-11-20 13:23:05 -07:00

Kconfig

io_uring: make zcrx depend on CONFIG_IO_URING

2025-03-31 07:07:44 -06:00

Makefile

io_uring: split out CQ waiting code into wait.c

2026-01-22 09:21:16 -07:00

memmap.c

io_uring/rsrc: use GFP_KERNEL_ACCOUNT consistently

2026-01-25 10:07:35 -07:00

memmap.h

io_uring: add helper calculating region byte size

2025-11-11 07:53:33 -07:00

mock_file.c

io_uring: convert io_create_mock_file() to FD_PREPARE()

2025-11-28 12:42:36 +01:00

msg_ring.c

io_uring/msg_ring: drop unnecessary submitter_task checks

2026-01-12 11:21:38 -07:00

msg_ring.h

io_uring/msg_ring: Drop custom destructor

2024-12-27 10:08:21 -07:00

napi.c

net: use napi_id_valid helper

2025-02-17 16:43:04 -08:00

napi.h

io_uring/napi: add static napi tracking strategy

2024-11-06 13:55:38 -07:00

net.c

io_uring/net: don't continue send bundle if poll was required for retry

2026-01-27 21:06:28 -07:00

net.h

io_uring/net: convert to struct iou_vec

2025-03-07 13:41:08 -07:00

nop.c

io_uring/nop: add support for IORING_SETUP_CQE_MIXED

2025-08-27 11:24:15 -06:00

nop.h

…

notif.c

io_uring: fix typos and comment wording

2025-11-05 08:21:43 -07:00

notif.h

io_uring/notif: implement notification stacking

2024-04-22 19:31:18 -06:00

opdef.c

io_uring: add support for IORING_SETUP_SQE_MIXED

2025-10-22 07:34:57 -06:00

opdef.h

io_uring: add support for IORING_SETUP_SQE_MIXED

2025-10-22 07:34:57 -06:00

openclose.c

io_uring: fix filename leak in __io_openat_prep()

2025-12-25 07:58:33 -07:00

openclose.h

io_uring: add support for IORING_OP_PIPE

2025-04-21 05:06:58 -06:00

poll.c

io_uring/poll: unify poll waitqueue entry and list removal

2025-12-05 10:23:28 -07:00

poll.h

io_uring: add wrapper type for io_req_tw_func_t arg

2025-11-03 08:31:26 -07:00

query.c

io_uring/query: drop unused io_handle_query_entry() ctx arg

2025-11-26 09:37:10 -07:00

query.h

io_uring/query: drop unused io_handle_query_entry() ctx arg

2025-11-26 09:37:10 -07:00

refs.h

io_uring: always do atomic put from iowq

2025-04-03 08:31:57 -06:00

register.c

io_uring: track restrictions separately for IORING_OP and IORING_REGISTER

2026-01-13 10:31:48 -07:00

register.h

io_uring: temporarily disable registered waits

2024-11-15 09:58:34 -07:00

rsrc.c

io_uring/rsrc: use GFP_KERNEL_ACCOUNT consistently

2026-01-25 10:07:35 -07:00

rsrc.h

io_uring/rsrc: take unsigned index in io_rsrc_node_lookup()

2026-01-22 15:58:17 -07:00

rw.c

io_uring: fix IOPOLL with passthrough I/O

2026-01-14 22:03:49 -07:00

rw.h

io_uring: add wrapper type for io_req_tw_func_t arg

2025-11-03 08:31:26 -07:00

slist.h

io_uring: IOPOLL polling improvements

2025-12-28 15:54:45 -07:00

splice.c

io_uring: don't include filetable.h in io_uring.h

2025-09-08 13:20:46 -06:00

splice.h

io_uring/splice: open code 2nd direct file assignment

2024-10-29 13:43:28 -06:00

sqpoll.c

io_uring: IOPOLL polling improvements

2025-12-28 15:54:45 -07:00

sqpoll.h

io_uring/sqpoll: switch away from getrusage() for CPU accounting

2025-10-22 10:51:20 -06:00

statx.c

io_uring: finish IOU_OK -> IOU_COMPLETE transition

2025-05-21 08:41:16 -06:00

statx.h

…

sync.c

io_uring/sync: validate passed in offset

2026-01-21 11:50:59 -07:00

sync.h

…

tctx.c

io_uring/wq: avoid indirect do_work/free_work calls

2025-04-21 05:06:58 -06:00

tctx.h

io_uring: simplify __io_uring_add_tctx_node

2022-10-07 12:25:30 -06:00

timeout.c

io_uring/timeout: annotate data race in io_flush_timeouts()

2026-01-20 09:54:17 -07:00

timeout.h

io_uring/timeout: don't export link t-out disarm helper

2025-05-06 10:11:23 -06:00

truncate.c

io_uring: finish IOU_OK -> IOU_COMPLETE transition

2025-05-21 08:41:16 -06:00

truncate.h

io_uring: add support for ftruncate

2024-02-09 09:04:39 -07:00

tw.c

io_uring: split out CQ waiting code into wait.c

2026-01-22 09:21:16 -07:00

tw.h

io_uring: split out CQ waiting code into wait.c

2026-01-22 09:21:16 -07:00

uring_cmd.c

io_uring/uring_cmd: explicitly disallow cancelations for IOPOLL

2026-01-14 22:04:11 -07:00

uring_cmd.h

io_uring/cmd: remove struct io_uring_cmd_data

2025-07-18 12:34:56 -06:00

wait.c

io_uring: split out CQ waiting code into wait.c

2026-01-22 09:21:16 -07:00

wait.h

io_uring: split out CQ waiting code into wait.c

2026-01-22 09:21:16 -07:00

waitid.c

Merge branch 'io_uring-6.18' into for-6.19/io_uring

2025-11-13 07:26:37 -07:00

waitid.h

io_uring: move cancelations to be io_uring_task based

2024-11-06 13:55:38 -07:00

xattr.c

io_uring: finish IOU_OK -> IOU_COMPLETE transition

2025-05-21 08:41:16 -06:00

xattr.h

…

zcrx.c

io_uring/zcrx: share an ifq between rings

2025-11-13 11:19:37 -07:00

zcrx.h

io_uring/zcrx: count zcrx users

2025-11-13 11:19:37 -07:00