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Commit fb2c66af authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

torture: Kill qemu, not parent process 



The current hang-check machinery in the rcutorture scripts uses "$!" of
a parenthesized bash statement to capture the pid.  Unfortunately, this
captures not qemu's pid, but rather that of its parent that implements
the parenthesized statement.  This commit therefore adjusts things so as
to capture qemu's actual pid, which then allows the script to actually
kill qemu in event of a kernel hang.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 9eb5188a

tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh

+24 −6
Original line number Diff line number Diff line
@@ -168,14 +168,25 @@ then 
fi

echo "NOTE: $QEMU either did not run or was interactive" > $resdir/console.log

echo $QEMU $qemu_args -m 512 -kernel $resdir/bzImage -append \"$qemu_append $boot_args\" > $resdir/qemu-cmd

( $QEMU $qemu_args -m 512 -kernel $resdir/bzImage -append "$qemu_append $boot_args"; echo $? > $resdir/qemu-retval ) &

qemu_pid=$!

( $QEMU $qemu_args -m 512 -kernel $resdir/bzImage -append "$qemu_append $boot_args"& echo $! > $resdir/qemu_pid; wait `cat  $resdir/qemu_pid`; echo $? > $resdir/qemu-retval ) &

commandcompleted=0

sleep 10 # Give qemu's pid a chance to reach the file

if test -s "$resdir/qemu_pid"

then

	qemu_pid=`cat "$resdir/qemu_pid"`

	echo Monitoring qemu job at pid $qemu_pid

else

	qemu_pid=""

	echo Monitoring qemu job at yet-as-unknown pid

fi

while :

do

	if test -z "$qemu_pid" -a -s "$resdir/qemu_pid"

	then

		qemu_pid=`cat "$resdir/qemu_pid"`

	fi

	kruntime=`awk 'BEGIN { print systime() - '"$kstarttime"' }' < /dev/null`

	if kill -0 $qemu_pid > /dev/null 2>&1

	if test -z "$qemu_pid" || kill -0 "$qemu_pid" > /dev/null 2>&1

	then

		if test $kruntime -ge $seconds

		then
@@ -195,12 +206,16 @@ do 
				ps -fp $killpid >> $resdir/Warnings 2>&1

			fi

		else

			echo ' ---' `date`: Kernel done

			echo ' ---' `date`: "Kernel done"

		fi

		break

	fi

done

if test $commandcompleted -eq 0

if test -z "$qemu_pid" -a -s "$resdir/qemu_pid"

then

	qemu_pid=`cat "$resdir/qemu_pid"`

fi

if test $commandcompleted -eq 0 -a -n "$qemu_pid"

then

	echo Grace period for qemu job at pid $qemu_pid

	while :
@@ -220,6 +235,9 @@ then 
		fi

		sleep 1

	done

elif test -z "$qemu_pid"

then

	echo Unknown PID, cannot kill qemu command

fi



parse-torture.sh $resdir/console.log $title