On 7/19/19 6:46 AM, Petr Mladek wrote:

On Thu 2019-07-18 16:42:25, Joe Lawrence wrote:

quoted

On 7/18/19 4:29 PM, Joe Lawrence wrote:

quoted

The livepatching self-tests tweak the dynamic debug config to verify
the kernel log during the tests.  Enhance set_dynamic_debug() so that
the config changes are restored when the script exits.

diff --git a/tools/testing/selftests/livepatch/functions.sh b/tools/testing/selftests/livepatch/functions.sh
index de5a504ffdbc..860f27665ebd 100644
--- a/tools/testing/selftests/livepatch/functions.sh
+++ b/tools/testing/selftests/livepatch/functions.sh

@@ -29,13 +29,27 @@ function die() {
   	exit 1
   }
-# set_dynamic_debug() - setup kernel dynamic debug
-#	TODO - push and pop this config?
+function push_dynamic_debug() {
+        DYNAMIC_DEBUG=$(grep '^kernel/livepatch' /sys/kernel/debug/dynamic_debug/control | \
+                awk -F'[: ]' '{print "file " $1 " line " $2 " " $4}')
+}

It works for me, though I feel that the
/sys/kernel/debug/dynamic_debug/control output to input translation is
brittle.  It would be nice to have some kind of mass export/import
capability for that interface.

I believe that the format is pretty stable. We could always reconsider
it when it breaks.

I could confirm that it restores the original state, so:

Tested-by: Petr Mladek <pmladek@suse.com>

Best Regards,
Petr

Hi Shuah,

Can you review and route this patch through your tree as well?

Thanks,

-- Joe