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selftests/damon/sysfs: hide expected write failures

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DAMON selftests for sysfs (sysfs.sh) tests if some writes to DAMON sysfs
interface files fails as expected.  It makes the test results noisy with
the failure error message because it tests a number of such failures. 
Redirect the expected failure error messages to /dev/null to make the
results clean.

Link: https://lkml.kernel.org/r/20230110190400.119388-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2023-01-10 19:03:59 +00:00 • committed by Andrew Morton
parent 2d2230efbc
commit 16ddcb1549
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/damon/sysfs.sh
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@ -24,7 +24,7 @@ ensure_write_fail()
content=$2
reason=$3
if echo "$content" > "$file"
if (echo "$content" > "$file") 2> /dev/null
then
echo "writing $content to $file succeed ($fail_reason)"
echo "expected failure because $reason"