Commit 80021ffb authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

torture: Make kvm-remote print diagnostics on initial ssh failure 



Currently, if the initial ssh fails, kvm-remote.sh gives up, printing a
message saying so.  But it would be nice to get a better idea as to why
ssh failed.  This commit therefore dumps out ssh's exit code, stdout,
and stderr upon ssh failure for diagnostic purposes.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent dd3ffd12

tools/testing/selftests/rcutorture/bin/kvm-remote.sh

+9 −3
Original line number Diff line number Diff line
@@ -137,14 +137,20 @@ chmod +x $T/bin/kvm-remote-*.sh 
# Check first to avoid the need for cleanup for system-name typos

for i in $systems

do

	ncpus="`ssh -o BatchMode=yes $i getconf _NPROCESSORS_ONLN 2> /dev/null`"

	ssh -o BatchMode=yes $i getconf _NPROCESSORS_ONLN > $T/ssh.stdout 2> $T/ssh.stderr

	ret=$?

	if test "$ret" -ne 0

	then

		echo System $i unreachable, giving up. | tee -a "$oldrun/remote-log"

		echo "System $i unreachable ($ret), giving up." | tee -a "$oldrun/remote-log"

		echo ' --- ssh stdout: vvv' | tee -a "$oldrun/remote-log"

		cat $T/ssh.stdout | tee -a "$oldrun/remote-log"

		echo ' --- ssh stdout: ^^^' | tee -a "$oldrun/remote-log"

		echo ' --- ssh stderr: vvv' | tee -a "$oldrun/remote-log"

		cat $T/ssh.stderr | tee -a "$oldrun/remote-log"

		echo ' --- ssh stderr: ^^^' | tee -a "$oldrun/remote-log"

		exit 4

	fi

	echo $i: $ncpus CPUs " " `date` | tee -a "$oldrun/remote-log"

	echo $i: `cat $T/ssh.stdout` CPUs " " `date` | tee -a "$oldrun/remote-log"

done



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