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ziomon: Ignore benign blkiomon early-read warnings

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The blkiomon warnings "bad trace magic 0" and "blkiomon: bad trace" are
benign startup artifacts caused by early pipeline reads before blktrace
produces a complete record. These messages do not affect processing and
valid reports are still generated. Filter them out so only real errors
trigger failures.

Signed-off-by: Ajaykumar Rajappa <ajaykr@linux.ibm.com>
Reviewed-by: Nihar Panda <niharp@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Ajaykumar Rajappa
2026-02-23 08:28:55 +01:00
committed by Jan Höppner
parent 7c75df9e96
commit 6537f711a6
1 changed files with 9 additions and 1 deletions
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ziomon/ziomon
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@@ -302,7 +302,7 @@ function start_trace() {
blkiomon_command="blkiomon --interval=$WRP_INTERVAL -Q $WRP_MSG_Q_PATH -q $WRP_MSG_Q_ID -m $WRP_MSG_Q_BLKIOMON_ID $verbose_blk -d -";
zfcpdd_command="ziomon_zfcpdd -Q $WRP_MSG_Q_PATH -q $WRP_MSG_Q_ID -m $WRP_MSG_Q_ZIOMON_ZFCPDD_ID -i $WRP_INTERVAL";
debug "starting blktrace: $blktrace_command | $blkiomon_command | $zfcpdd_command";
$blktrace_command 2>$WRP_MSG_Q_PATH/blktrace.err | $blkiomon_command | $zfcpdd_command > $WRP_MSG_Q_PATH/blktrace.log &
$blktrace_command 2>$WRP_MSG_Q_PATH/blktrace.err | $blkiomon_command 2>$WRP_MSG_Q_PATH/blkiomon.err | $zfcpdd_command > $WRP_MSG_Q_PATH/blktrace.log &
i=0;
# might take a moment to start all processes in the pipe if system under load
while [ $i -lt 60 ]; do
@@ -352,6 +352,14 @@ function start_trace() {
done
debug "end data collection at `date`";
# Ignore benign blkiomon early-read warnings
len=`grep -vcE "^bad trace magic 0|^blkiomon: bad trace" $WRP_MSG_Q_PATH/blkiomon.err 2>/dev/null`;
if [ $len -ne 0 ]; then
cat $WRP_MSG_Q_PATH/blkiomon.err;
echo "Error: blkiomon has errors, aborting";
return;
fi
echo "done";
}