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Merge pull request #784 from euspectre/kpatch-retry-cosmetic

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kpatch: a couple small enhancements in retry logic
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Joe Lawrence 2018-02-08 11:49:46 -05:00 committed by GitHub
commit 84f2405dd3
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1 changed files with 8 additions and 3 deletions
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@ -29,6 +29,11 @@ VERSION="0.5.0"
POST_ENABLE_WAIT=5 # seconds
POST_SIGNAL_WAIT=60 # seconds
# How many times to try loading the patch if activeness safety check fails.
MAX_LOAD_ATTEMPTS=5
# How long to wait before retry, in seconds.
RETRY_INTERVAL=2
usage_cmd() {
printf ' %-20s\n %s\n' "$1" "$2" >&2
}
@ -316,7 +321,7 @@ load_module () {
echo "loading patch module: $module"
local i=0
while true; do
out="$(insmod "$module" 2>&1)"
out="$(LC_ALL=C insmod "$module" 2>&1)"
[[ -z "$out" ]] && break
echo "$out" 1>&2
[[ ! "$out" =~ "Device or resource busy" ]] &&
@ -325,12 +330,12 @@ load_module () {
# "Device or resource busy" means the activeness safety check
# failed. Retry in a few seconds.
i=$((i+1))
if [[ $i = 5 ]]; then
if [[ $i = $MAX_LOAD_ATTEMPTS ]]; then
die "failed to load module $module"
break
else
warn "retrying..."
sleep 2
sleep $RETRY_INTERVAL
fi
done