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io_uring/zcrx: make scrubbing more reliable

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Currently, scrubbing is done once before killing all recvzc requests.
It's fine as those are cancelled and don't return buffers afterwards,
but it'll be more reliable not to rely that much on cancellations.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/c4ea127023494cbbedebd21a2b7ae5ff0448eb95.1779189667.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2026-05-19 12:44:27 +01:00 committed by Jens Axboe
parent 67ee1f021a
commit 74fc9a9b50
1 changed files with 6 additions and 0 deletions
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6
io_uring/zcrx.c
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@ -985,6 +985,12 @@ void io_unregister_zcrx(struct io_ring_ctx *ctx)
}
if (!ifq)
break;
/*
* io_uring can run requests and return buffers to the user
* after termination, scrub it again.
*/
if (refcount_read(&ifq->user_refs) == 0)
io_zcrx_scrub(ifq);
io_put_zcrx_ifq(ifq);
}