X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=scripts%2Fcommon.sh.in;fp=scripts%2Fcommon.sh.in;h=51671ebc019314bae11f39022f2745479ad3f427;hb=10715a018760e1d862b8348e31dc505e832a0904;hp=cf558594502daf67ce5b5cbf4b2714b66bf9d6b4;hpb=da88a7fbe8876437c25f1006f91ca5595659b8d2;p=zfs.git

diff --git a/scripts/common.sh.in b/scripts/common.sh.in
index cf55859..51671eb 100644
--- a/scripts/common.sh.in
+++ b/scripts/common.sh.in
@@ -635,3 +635,29 @@ wait_udev() {
 
 	return 0
 }
+
+stack_clear() {
+	local STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
+	local STACK_TRACER_ENABLED=/proc/sys/kernel/stack_tracer_enabled
+
+	if [ -e $STACK_MAX_SIZE ]; then
+		echo 1 >$STACK_TRACER_ENABLED
+		echo 0 >$STACK_MAX_SIZE
+	fi
+}
+
+stack_check() {
+	local STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
+	local STACK_TRACE=/sys/kernel/debug/tracing/stack_trace
+	local STACK_LIMIT=7000
+
+	if [ -e $STACK_MAX_SIZE ]; then
+		STACK_SIZE=`cat $STACK_MAX_SIZE`
+
+		if [ $STACK_SIZE -ge $STACK_LIMIT ]; then
+			echo
+			echo "Warning: max stack size $STACK_SIZE bytes"
+			cat $STACK_TRACE
+		fi
+	fi
+}