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Subject[PATCH 0/3] watchdog/softlockup: Report overall time and some cleanup
Date
This is rework of the softlockup improvements sent as
https://lkml.kernel.org/r/20190819104732.20966-1-pmladek@suse.com
based on feedback from Peter Zijlstra.

+ merged the two patches
+ moved some cleanup changes into separate patches
+ improved the code and commit messages

The main change is in 2nd patch. It fixes the time spent in softlockup.

Original:

[ 168.277520] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [cat:4865]
[ 196.277604] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [cat:4865]
[ 236.277522] watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [cat:4865]
^^^

New:

[ 480.372418] watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [cat:4943]
[ 508.372359] watchdog: BUG: soft lockup - CPU#2 stuck for 52s! [cat:4943]
[ 548.372359] watchdog: BUG: soft lockup - CPU#2 stuck for 89s! [cat:4943]
[ 576.372351] watchdog: BUG: soft lockup - CPU#2 stuck for 115s! [cat:4943]
^^^^^
1st and 3rd patch clean up the code.


Petr Mladek (3):
watchdog/softlockup: Remove obsolete check of last reported task
watchdog/softlockup: Report the overall time of softlockups
watchdog/softlockup: Remove logic that tried to prevent repeated
reports

kernel/watchdog.c | 67 ++++++++++++++++++++++++-------------------------------
1 file changed, 29 insertions(+), 38 deletions(-)

--
2.16.4

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