Revision b22fa62a35d7f2029d757a518d78041822b7c7c1 authored by Pavel Begunkov on 21 October 2021, 12:20:29 UTC, committed by Jens Axboe on 21 October 2021, 17:19:38 UTC
Another change to the API io-wq worker limitation API added in 5.15,
apply the limit to all prior users that already registered a tctx. It
may be confusing as it's now, in particular the change covers the
following 2 cases:
TASK1 | TASK2
_________________________________________________
ring = create() |
| limit_iowq_workers()
*not limited* |
TASK1 | TASK2
_________________________________________________
ring = create() |
| issue_requests()
limit_iowq_workers() |
| *not limited*
A note on locking, it's safe to traverse ->tctx_list as we hold
->uring_lock, but do that after dropping sqd->lock to avoid possible
problems. It's also safe to access tctx->io_wq there because tasks
kill it only after removing themselves from tctx_list, see
io_uring_cancel_generic() -> io_uring_clean_tctx()
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d6e09ecc3545e4dc56e43c906ee3d71b7ae21bed.1634818641.git.asml.silence@gmail.com
Reviewed-by: Hao Xu <haoxu@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent 4ea672a
| File | Mode | Size |
|---|---|---|
| .gitignore | -rw-r--r-- | 103 bytes |
| Kconfig | -rw-r--r-- | 14.1 KB |
| Makefile | -rw-r--r-- | 1016 bytes |
| adummy.c | -rw-r--r-- | 4.1 KB |
| ambassador.c | -rw-r--r-- | 65.1 KB |
| ambassador.h | -rw-r--r-- | 15.0 KB |
| atmtcp.c | -rw-r--r-- | 11.5 KB |
| eni.c | -rw-r--r-- | 61.0 KB |
| eni.h | -rw-r--r-- | 4.6 KB |
| firestream.c | -rw-r--r-- | 53.4 KB |
| firestream.h | -rw-r--r-- | 13.9 KB |
| fore200e.c | -rw-r--r-- | 82.8 KB |
| fore200e.h | -rw-r--r-- | 38.1 KB |
| he.c | -rw-r--r-- | 76.1 KB |
| he.h | -rw-r--r-- | 19.8 KB |
| horizon.c | -rw-r--r-- | 81.3 KB |
| horizon.h | -rw-r--r-- | 16.0 KB |
| idt77105.c | -rw-r--r-- | 11.2 KB |
| idt77105.h | -rw-r--r-- | 3.8 KB |
| idt77252.c | -rw-r--r-- | 89.1 KB |
| idt77252.h | -rw-r--r-- | 33.6 KB |
| idt77252_tables.h | -rw-r--r-- | 45.0 KB |
| iphase.c | -rw-r--r-- | 107.5 KB |
| iphase.h | -rw-r--r-- | 53.3 KB |
| lanai.c | -rw-r--r-- | 80.3 KB |
| midway.h | -rw-r--r-- | 7.6 KB |
| nicstar.c | -rw-r--r-- | 72.9 KB |
| nicstar.h | -rw-r--r-- | 22.9 KB |
| nicstarmac.c | -rw-r--r-- | 6.0 KB |
| nicstarmac.copyright | -rw-r--r-- | 2.7 KB |
| solos-attrlist.c | -rw-r--r-- | 2.3 KB |
| solos-pci.c | -rw-r--r-- | 38.8 KB |
| suni.c | -rw-r--r-- | 9.8 KB |
| suni.h | -rw-r--r-- | 9.8 KB |
| tonga.h | -rw-r--r-- | 733 bytes |
| uPD98401.h | -rw-r--r-- | 11.7 KB |
| uPD98402.c | -rw-r--r-- | 6.5 KB |
| uPD98402.h | -rw-r--r-- | 4.5 KB |
| zatm.c | -rw-r--r-- | 43.2 KB |
| zatm.h | -rw-r--r-- | 3.6 KB |
| zeprom.h | -rw-r--r-- | 984 bytes |
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