From: Andrew Morton <akpm@linux-foundation.org>
To: Yuwen Chen <ywen.chen@foxmail.com>
Cc: andrealmeid@igalia.com, bigeasy@linutronix.de,
colin.i.king@gmail.com, dave@stgolabs.net, dvhart@infradead.org,
edliaw@google.com, justinstitt@google.com,
kernel-team@android.com, licayy@foxmail.com,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
luto@mit.edu, mingo@redhat.com, morbo@google.com,
nathan@kernel.org, ndesaulniers@google.com, peterz@infradead.org,
shuah@kernel.org, tglx@kernel.org, usama.anjum@collabora.com,
wakel@google.com
Subject: Re: [RESEND PATCH v3] selftests/futex: fix the failed futex_requeue test issue
Date: Thu, 30 Apr 2026 16:41:27 -0700 [thread overview]
Message-ID: <20260430164127.b8d68639a5c1708411cf7508@linux-foundation.org> (raw)
In-Reply-To: <tencent_1BF14BBF2BBF088E3B609CC155EC7C206F05@qq.com>
On Mon, 27 Apr 2026 18:18:38 +0800 Yuwen Chen <ywen.chen@foxmail.com> wrote:
> This test item has extremely high requirements for timing and can only
> pass the test under specific conditions. The following situations will
> lead to test failure:
>
> MainThread Thread1
> │
> pthread_create-------------------┐
> │ │
> futex_cmp_requeue │
> │ futex_wait
> │ │
>
> If the child thread is not waiting in the futex_wait function when the
> main thread reaches the futex_cmp_requeue function, the test will fail.
So you're saying that this test is generally flakey and annoying?
Yup, we would like to fix that.
> This patch avoids this problem by checking whether the child thread is
> in a sleeping state in the main thread.
Thanks!
AI review asked some questions, as it likes to do:
https://sashiko.dev/#/patchset/tencent_1BF14BBF2BBF088E3B609CC155EC7C206F05@qq.com
next prev parent reply other threads:[~2026-04-30 23:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-28 7:16 [PATCH v3] selftests/futex: fix the failed futex_requeue test issue Yuwen Chen
2026-04-27 10:18 ` [RESEND PATCH " Yuwen Chen
2026-04-28 10:58 ` Sebastian Andrzej Siewior
2026-04-29 1:40 ` Yuwen Chen
2026-04-30 23:41 ` Andrew Morton [this message]
2026-05-06 3:35 ` Yuwen Chen
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