unimore/kernel-hacking-2024-linux-steffo
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ktest: Add check for bug or panic during reboot

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Usually the target is booted into a dependable kernel when a test
starts. The test will install the test kernel and reboot the box. But
there may be a time that the kernel is running an unreliable kernel and
the reboot may crash.

Have ktest detect crashes on a reboot and force a power-cycle instead.

This can usually happen if a test kernel was installed to run manual
tests, but the user forgot to reboot to the known good kernel.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2012-07-19 16:08:33 -04:00 committed by Steven Rostedt
parent 407b95b7a0
commit 8a80c72711
1 changed files with 27 additions and 1 deletions
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28
tools/testing/ktest/ktest.pl
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@ -1138,6 +1138,7 @@ sub reboot {
if (defined($time)) {
if (wait_for_monitor($time, $reboot_success_line)) {
# reboot got stuck?
doprint "Reboot did not finish. Forcing power cycle\n";
run_command "$power_cycle";
}
end_monitor;
@ -1235,6 +1236,9 @@ sub wait_for_monitor {
my $line;
my $booted = 0;
my $start_time = time;
my $skip_call_trace = 0;
my $bug = 0;
my $bug_ignored = 0;
my $now;
doprint "** Wait for monitor to settle down **\n";
@ -1251,6 +1255,28 @@ sub wait_for_monitor {
$booted = 1;
}
if ($full_line =~ /\[ backtrace testing \]/) {
$skip_call_trace = 1;
}
if ($full_line =~ /call trace:/i) {
if (!$bug && !$skip_call_trace) {
if ($ignore_errors) {
$bug_ignored = 1;
} else {
$bug = 1;
}
}
}
if ($full_line =~ /\[ end of backtrace testing \]/) {
$skip_call_trace = 0;
}
if ($full_line =~ /Kernel panic -/) {
$bug = 1;
}
if ($line =~ /\n/) {
$full_line = "";
}
@ -1261,7 +1287,7 @@ sub wait_for_monitor {
}
}
print "** Monitor flushed **\n";
return 0;
return $bug;
}
sub save_logs {