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scripts: Ignore RLIMIT_CORE while writing out core dumps

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As stated in the core(5) the RLIMIT_CORE is not enforced when kernel
is piping core to the collector, hence it will be written out even
when it's set to 0. Instead of playing nice and checking the validity
of RLIMIT_CORE, simply ignore it and apply our own limit (2GB).

This is done for convenience and to make sure that any changes to the
way how given distro applies limits (see fedora37) to the processes
doesn't affect our core collection.

Signed-off-by: Michal Berger <michal.berger@intel.com>
Change-Id: Iab8757f548f2a4f0f4b27b4ce66b0a4a84ed2579
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15994
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Michal Berger 2022-12-16 16:36:55 +01:00 committed by Tomasz Zawadzki
parent f287da5cb0
commit 9545f9ac49
2 changed files with 4 additions and 10 deletions
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2
autotest.sh
View File

@ -36,7 +36,7 @@ if [ $(uname -s) = Linux ]; then
# Dump the $output_dir path to a file so collector can pick it up while executing.
# We don't set in in the core_pattern command line because of the string length limitation
# of 128 bytes. See 'man core 5' for details.
echo "|$rootdir/scripts/core-collector.sh %P %s %t %c" > /proc/sys/kernel/core_pattern
echo "|$rootdir/scripts/core-collector.sh %P %s %t" > /proc/sys/kernel/core_pattern
echo "$output_dir/coredumps" > "$rootdir/.coredump_path"
# make sure nbd (network block device) driver is loaded if it is available

12
scripts/core-collector.sh
View File

@ -7,7 +7,7 @@
# can include whitespaces or other funny characters, and working
# with those on the cmdline would be a nightmare. Use procfs for
# the remaining pieces we want to gather:
# |$rootdir/scripts/core-collector.sh %P %s %t %c $output_dir
# |$rootdir/scripts/core-collector.sh %P %s %t $output_dir
core_meta() {
jq . <<- CORE
@ -34,7 +34,6 @@ stderr() {
args+=(core_pid)
args+=(core_sig)
args+=(core_ts)
args+=(rlimit)
read -r "${args[@]}" <<< "$*"
@ -50,13 +49,8 @@ stderr
# RLIMIT_CORE is not enforced when core is piped to us. To make
# sure we won't attempt to overload underlying storage, copy
# only the reasonable amount of bytes (systemd defaults to 2G
# so let's follow that). But first, check limits of terminating
# process to see if we need to make any adjustments.
max_core=$((1024 * 1024 * 1024 * 2))
if ((rlimit == 0xffffffffffffffff || rlimit > max_core)); then
rlimit=$max_core
fi
# so let's follow that).
rlimit=$((1024 * 1024 * 1024 * 2))
# Clear path for lz
rm -f "$core"{,.{bin,bt,gz,json}}