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* [PATCH 0/3] io_uring: fixes for provided buffer ring
@ 2022-06-13 10:11 Dylan Yudaken
  2022-06-13 10:11 ` [PATCH 1/3] io_uring: fix index calculation Dylan Yudaken
                   ` (4 more replies)
  0 siblings, 5 replies; 10+ messages in thread
From: Dylan Yudaken @ 2022-06-13 10:11 UTC (permalink / raw)
  To: axboe, asml.silence, io-uring; +Cc: Kernel-team, Dylan Yudaken

This fixes two problems in the new provided buffer ring feature. One
is a simple arithmetic bug (I think this came out from a refactor).
The other is due to type differences between head & tail, which causes
it to sometimes reuse an old buffer incorrectly.

Patch 1&2 fix bugs
Patch 3 limits the size of the ring as it's not
possible to address more entries with 16 bit head/tail

I will send test cases for liburing shortly.

One question might be if we should change the type of ring_entries
to uint16_t in struct io_uring_buf_reg?

Dylan Yudaken (3):
  io_uring: fix index calculation
  io_uring: fix types in provided buffer ring
  io_uring: limit size of provided buffer ring

 fs/io_uring.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)


base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56
-- 
2.30.2


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2022-06-14  3:47 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-06-13 10:11 [PATCH 0/3] io_uring: fixes for provided buffer ring Dylan Yudaken
2022-06-13 10:11 ` [PATCH 1/3] io_uring: fix index calculation Dylan Yudaken
2022-06-13 10:11 ` [PATCH 2/3] io_uring: fix types in provided buffer ring Dylan Yudaken
2022-06-13 10:11 ` [PATCH 3/3] io_uring: limit size of " Dylan Yudaken
2022-06-13 11:08 ` [PATCH 0/3] io_uring: fixes for " Hao Xu
2022-06-13 12:59   ` Pavel Begunkov
2022-06-13 13:16     ` Dylan Yudaken
2022-06-13 14:05       ` Pavel Begunkov
2022-06-14  3:47         ` Hao Xu
2022-06-13 12:49 ` Jens Axboe

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