linux-kernel - Re: [PATCH bpf v4 2/2] selftests/bpf: add regression test for bpf_d

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Message-ID: <20251204123853.1235-1-electronlsr@gmail.com>
Date: Thu,  4 Dec 2025 20:38:52 +0800
From: Shuran Liu <electronlsr@...il.com>
To: song@...nel.org,
	mattbobrowski@...gle.com,
	bpf@...r.kernel.org
Cc: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
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	rostedt@...dmis.org,
	mhiramat@...nel.org,
	mathieu.desnoyers@...icios.com,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
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	linux-kselftest@...r.kernel.org,
	shuah@...nel.org,
	electronlsr@...il.com
Subject: Re: [PATCH bpf v4 2/2] selftests/bpf: add regression test for bpf_d_path()

Hi,

I looked into the CI failure and it’s caused by the test assuming
/tmp is on tmpfs, which is not true in the CI environment, so
fallocate() fails there. Since /dev/shm is mounted as tmpfs on that
setup, would it be acceptable to change the test to use a file under
/dev/shm instead of /tmp?