linux-kernel - [PATCH v2 0/2] selftests: cachestat: fix run on older kernels

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Message-Id: <20230821160534.3414911-1-andre.przywara@arm.com>
Date:   Mon, 21 Aug 2023 17:05:32 +0100
From:   Andre Przywara <andre.przywara@....com>
To:     Shuah Khan <shuah@...nel.org>, Nhat Pham <nphamcs@...il.com>,
        Johannes Weiner <hannes@...xchg.org>
Cc:     linux-kselftest@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/2] selftests: cachestat: fix run on older kernels

I ran all kernel selftests on some test machine, and stumbled upon
cachestat failing (among others).
These patches fix the run on older kernels and when the current
directory is on a tmpfs instance.

I dropped the first two fix patches from v1, since Shuah applied those
already. [PATCH v2 1/2] is almost the same as [PATCH 3/3] from v1, but
using the proper skip function from kselftest.h. I am not sure if Shuah
applied that already, if yes, it's not a big problem, the output is the
same.

Patch 2/2 implements the tmpfs detection that Nhat suggested the last
time (many thanks for pointing me to statfs and the magics!).

Cheers,
Andre

Andre Przywara (2):
  selftests: cachestat: test for cachestat availability
  selftests: cachestat: catch failing fsync test on tmpfs

 .../selftests/cachestat/test_cachestat.c      | 80 +++++++++++++++----
 1 file changed, 65 insertions(+), 15 deletions(-)

-- 
2.25.1