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From: Shuah <shuah@kernel.org>
To: UYeol Jo <jouyeol8739@gmail.com>, Shuah Khan <shuah@kernel.org>
Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
	richard.weiyang@gmail.com, akpm@linux-foundation.org,
	sef1548@gmail.com
Subject: Re: [PATCH] selftests/ipc: skip msgque test if MSG_COPY is not supported
Date: Tue, 20 Jan 2026 17:03:58 -0700	[thread overview]
Message-ID: <264104b5-ac21-415b-9021-76d4d9b79a55@kernel.org> (raw)
In-Reply-To: <20260119112120.83592-1-jouyeol8739@gmail.com>

On 1/19/26 04:21, UYeol Jo wrote:
> The msgque test uses the MSG_COPY flag, which depends on
> CONFIG_CHECKPOINT_RESTORE. On kernels where this option is disabled,
> msgrcv() fails with ENOSYS.
> 
> Currently, the test reports this as a failure:
> 
> Change it to skip the test instead, as the failure is due to missing
> kernel configuration rather than a bug in the IPC subsystem.
>   # selftests: ipc: msgque
>   # not ok 1 Failed to copy IPC message: Function not implemented (38)
>   # not ok 2 Failed to dump queue: -38
> 
> After this patch, the test reports a skip instead of failure:
> 1..0 # SKIP MSG_COPY not supported

Did you happen to test this with CONFIG_CHECKPOINT_RESTORE
enabled and without?

MSG_COPY is not specific to CONFIG_CHECKPOINT_RESTORE - I see
MSG_COPY flag handling on non-CONFIG_CHECKPOINT_RESTORE code
in ipc/msg.c.

thanks,
-- Shuah

  reply	other threads:[~2026-01-21  0:03 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-19 11:21 UYeol Jo
2026-01-21  0:03 ` Shuah [this message]
2026-01-24  8:35   ` 조우열

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