From 6537f711a6395f63b0872b97a71391fb01184d40 Mon Sep 17 00:00:00 2001 From: Ajaykumar Rajappa Date: Mon, 23 Feb 2026 08:28:55 +0100 Subject: [PATCH] ziomon: Ignore benign blkiomon early-read warnings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Nihar Panda Signed-off-by: Jan Höppner --- ziomon/ziomon | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/ziomon/ziomon b/ziomon/ziomon index d1a5690c..3b1dadd5 100755 --- a/ziomon/ziomon +++ b/ziomon/ziomon @@ -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"; }