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From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org
Cc: ming.lei@redhat.com, Guang Wu <guazhang@redhat.com>
Subject: [v6.4 Regression] rust/io_uring: tests::net::test_tcp_recv_multi hangs
Date: Thu, 19 Oct 2023 16:06:28 +0800	[thread overview]
Message-ID: <ZTDjhCk8TC47oBdZ@fedora> (raw)

Hello Jens,

Guang Wu found that tests::net::test_tcp_recv_multi in rust:io_uring
hangs, and no such issue in RH test kernel.

- git clone https://github.com/tokio-rs/io-uring.git
- cd io-uring
- cargo run --package io-uring-test

I figured out that it is made by missing the last CQE with -ENOBUFS,
which is caused by commit a2741c58ac67 ("io_uring/net: don't retry recvmsg()
unnecessarily").

I am not sure if the last CQE should be returned and that depends how normal
recv_multi is written, but IORING_CQE_F_MORE in the previous CQE shouldn't be
returned at least.


Thanks,
Ming


             reply	other threads:[~2023-10-19  8:07 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-19  8:06 Ming Lei [this message]
2023-10-19 11:31 ` [v6.4 Regression] rust/io_uring: tests::net::test_tcp_recv_multi hangs Jens Axboe
2023-10-19 11:47   ` Ming Lei
2023-10-19 12:10     ` Jens Axboe

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