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kpatch: increase patch transition stall timeout

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I loaded a livepatch on an idle 112 CPU system, and it took over three
seconds for the patch transition to complete:

  [1561551.584871] livepatch: 'livepatch_foo': starting patching transition
  [1561554.867486] livepatch: 'livepatch_foo: patching complete

Presumably this is because more CPUS == more kthreads and idle tasks,
which are more likely to be running at any given time.

Currently the kpatch script will start signaling tasks if the transition
takes more than five seconds.  Increase that timeout a bit to 15
seconds, to give big/busy systems more time before we start signaling.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
This commit is contained in:
Josh Poimboeuf 2018-04-20 16:21:00 -05:00
parent 1fa1e7a05a
commit 6db0a6f06c
1 changed files with 1 additions and 1 deletions
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@ -26,7 +26,7 @@
INSTALLDIR=/var/lib/kpatch INSTALLDIR=/var/lib/kpatch
SCRIPTDIR="$(readlink -f "$(dirname "$(type -p "$0")")")" SCRIPTDIR="$(readlink -f "$(dirname "$(type -p "$0")")")"
VERSION="0.5.0" VERSION="0.5.0"
POST_ENABLE_WAIT=5 # seconds POST_ENABLE_WAIT=15 # seconds
POST_SIGNAL_WAIT=60 # seconds POST_SIGNAL_WAIT=60 # seconds
# How many times to try loading the patch if activeness safety check fails. # How many times to try loading the patch if activeness safety check fails.