Differential D8319

Speed up pw operations that edit /etc/group or /etc/passwd
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Authored by asomers on Oct 21 2016, 8:36 PM.

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Reviewers

dwmalone
allanjude
bapt
garga
vangyzen

Commits

rS308806: Speed up pw operations that edit /etc/group or /etc/passwd

Summary

r285050 fixed a bug in pw that could lead to /etc/passwd or /etc/group
corruption on power loss. However, it fixed it by opening those files with
O_SYNC, which is very slow, especially on ZFS. This change replaces O_SYNC
with appropriately place fsync()s instead, which is much faster. Using a
ZFS tmpdir, the time to run pw's kyua tests drops from 245s to 35s.

Test Plan

pw's kyua tests

Diff Detail

Repository

rS FreeBSD src repository - subversion

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Event Timeline

asomers updated this revision to Diff 21605.Oct 21 2016, 8:36 PM

asomers retitled this revision from to Speed up pw operations that edit /etc/group or /etc/passwd.

asomers updated this object.

asomers edited the test plan for this revision. (Show Details)

asomers added reviewers: garga, dwmalone.

asomers added subscribers: truckman, bapt, vangyzen, se.

Herald added a subscriber: imp. · View Herald TranscriptOct 21 2016, 8:36 PM

allanjude accepted this revision.Oct 21 2016, 8:39 PM

allanjude added a reviewer: allanjude.

This revision is now accepted and ready to land.Oct 21 2016, 8:39 PM

Is anybody able to test the pfsense issue with my patch?
https://redmine.pfsense.org/issues/4523

bapt accepted this revision.Oct 22 2016, 1:17 AM

bapt added a reviewer: bapt.

vangyzen accepted this revision.Oct 28 2016, 2:44 PM

vangyzen added a reviewer: vangyzen.

I tried to break it on pfSense and couldn't reproduce original issue. Looks OK to me

Closed by commit rS308806: Speed up pw operations that edit /etc/group or /etc/passwd (authored by asomers). · Explain WhyNov 18 2016, 4:07 PM

This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Path

Size

head/

lib/

libutil/

2 lines

2 lines

usr.sbin/

pw/

1 line

1 line

1 line

Diff 22331

head/lib/libutil/gr_util.c

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head/lib/libutil/pw_util.c

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head/usr.sbin/pw/grupd.c

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head/usr.sbin/pw/pw_nis.c

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head/usr.sbin/pw/pwupd.c

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