ktest.pl: Have config-bisect save each config used in the bisect

When performing a automatic config bisect via ktest.pl, it is very useful to
have a copy of each of the bisects used. This way, if a bisect were to go
wrong, it is possible to retrace the steps and continue at the location
before the error was made.

The ktest.pl will make a copy of the good and bad configs, labeled as such,
as well as a number attached to it that represents the iteration of the
bisect. These files are saved in the ktest temp directory where it currently
stores the good and bad config files.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 7570e36d636d833670253881fc501444d2bfcba1..5f6f88911f5cf9b4434d94de1e74e71d111bf163 100755 (executable)
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -3188,6 +3188,8 @@ sub config_bisect_end {
     doprint "***************************************\n\n";
 }
 
+my $pass = 1;
+
 sub run_config_bisect {
     my ($good, $bad, $last_result) = @_;
     my $reset = "";
@@ -3210,11 +3212,15 @@ sub run_config_bisect {
 
     $ret = run_config_bisect_test $config_bisect_type;
     if ($ret) {
-        doprint "NEW GOOD CONFIG\n";
+        doprint "NEW GOOD CONFIG ($pass)\n";
+       system("cp $output_config $tmpdir/good_config.tmp.$pass");
+       $pass++;
        # Return 3 for good config
        return 3;
     } else {
-        doprint "NEW BAD CONFIG\n";
+        doprint "NEW BAD CONFIG ($pass)\n";
+       system("cp $output_config $tmpdir/bad_config.tmp.$pass");
+       $pass++;
        # Return 4 for bad config
        return 4;
     }