Bug#908647: CPU hog during fcheck task

From	Peter Viskup <skupko.sk@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#908647: CPU hog during fcheck task
Date	2018-09-12 10:20 +0200
Message-ID	<wx8xr-5eF-9@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Package: linux-latest
Version: 4.9.110-3+deb9u4
Severity: important

After kernel update on Debian9 system from 4.9.65-3+deb9u1 to
4.9.110-3+deb9u4 the fcheck cron job run +45000 seconds instead of
original +8500 seconds (tested twice with same results).

Tested with command
$ perf stat -B -o fcheck.perf.stat nocache nice ionice -c3
/usr/sbin/fcheck -asxrf /etc/fcheck/fcheck.cfg >/var/run/fcheck.out
2>&1

$ grep "time elapsed" fcheck.perf.stat*
fcheck.perf.stat:    8573.851887243 seconds time elapsed
fcheck.perf.stat2:    8544.105864343 seconds time elapsed
fcheck.perf.stat3:   45450.729247342 seconds time elapsed
fcheck.perf.stat4:   45808.049670206 seconds time elapsed

-- 
Peter

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Bug#908647: CPU hog during fcheck task Peter Viskup <skupko.sk@gmail.com> - 2018-09-12 10:20 +0200

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