io_uring/zcrx: cache RQ tail

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The RQ tail is updated by the user space. Cache it to reduce cache line
bouncing. Refilling now tries to exhaust the previous batch of rqes, but
since it could be too low, the iterator is allowed to recalculate the
rqes to process once after synching the tail value.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/b42d2ed8b0e697110b646573b5da2a5f8e85f92e.1786108672.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2026-08-07 14:19:22 +01:00 • committed by Jens Axboe

parent 2292f4fbc5

commit 888f7ab164

2 changed files with 22 additions and 6 deletions

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io_uring/zcrx.c

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1

io_uring/zcrx.h

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