Re: [PATCH 2/2] selftests/pstore: add pstore test scripts going with reboot

Hello,

 >> +prlog "Causing kernel crash ..."
 >> +
 >> +# enable all functions triggered by sysrq
 >> +echo 1 > /proc/sys/kernel/sysrq
 >> +# setting to reboot in 3 seconds after panic
 >> +echo 3 > /proc/sys/kernel/panic
 >> +# setting to cause panic when oops occurs
 >> +echo 1 > /proc/sys/kernel/panic_on_oops
 >> +
 >> +# create a file as reboot flag
 >> +touch $REBOOT_FILE
 >> +sync
 >> +
 >> +# cause crash
 >> +echo c > /proc/sysrq-trigger
 >
 > Do you need to stop kdump service before the sysrq?

Yes, I should check /sys/kernel/kexec_crash_loaded. If the value is
1, this script should try to unload kexec kernel.

 > Or, does it cover oops and kdump case?

No, not yet. I think we should support oops case at first.

Best regards,
Hiraku Toyooka

阿口誠司 / AGUCHI，SEIJI wrote:

quoted

+prlog "Causing kernel crash ..."
+
+# enable all functions triggered by sysrq
+echo 1 > /proc/sys/kernel/sysrq
+# setting to reboot in 3 seconds after panic
+echo 3 > /proc/sys/kernel/panic
+# setting to cause panic when oops occurs
+echo 1 > /proc/sys/kernel/panic_on_oops
+
+# create a file as reboot flag
+touch $REBOOT_FILE
+sync
+
+# cause crash
+echo c > /proc/sysrq-trigger

Do you need to stop kdump service before the sysrq?
Or, does it cover oops and kdump case?

Seiji

quoted

-----Original Message-----
From: 豊岡拓 / Toyooka，Hiraku
Sent: Tuesday, September 15, 2015 11:42 AM
To: Kees Cook
Cc: LKML; Tony Luck; Linux API; Anton Vorontsov; Shuah Khan; Mark Salyzyn; Colin Cross; 阿口誠司 / AGUCHI，SEIJI
Subject: Re: [PATCH 2/2] selftests/pstore: add pstore test scripts going with reboot

Hello Kees,

  >> +run_crash:
  >> +       @sh pstore_crash_test || echo "pstore_crash_test: [FAIL]"
  >
  > This is probably better written to exit 1 on failure, otherwise it
  > just _says_ it fails. (Though lots of selftests in the tree already
  > have this problem, it's best to avoid the pattern for new stuff.)
  > Maybe something like:
  >
  >      @sh pstore_crash_test || { echo "pstore_crash_test: [FAIL]";
exit 1; }

OK. I'll add the "exit 1".

  >> +prlog -n "Checking dmesg files exist in pstore filesystem ... "
  >> +if [ -e dmesg-${backend}-0 ]; then
  >> +    prlog "ok"
  >> +    for f in `ls dmesg-${backend}-*`; do
  >> +       prlog -e "\t${f}"
  >> +    done
  >> +else
  >> +    prlog "FAIL"
  >> +    rc=1
  >> +fi
  >
  > This test pattern is repeated a lot. Maybe better to create a helper
  > function instead? It could make the tests much more readable.

Yes, I should make a helper function in v2.

Best regards,
Hiraku Toyooka

-- 
Hiraku Toyooka
Systems Productivity Research Dept. / Linux Technology Center
Center for Technology Innovation - Systems Engineering, Hitachi Ltd.