From: Vladimir Davydov <vdavy...@parallels.com> Author: Konstantin Khorenko Email: khore...@parallels.com Subject: lockdep: taint kernel on circular locking complains Date: Mon, 23 Sep 2013 20:04:29 +0400
Currently our QA infrastructure cannot efficiently grep kernel logs and analyze them thus lockdep complains are lost. Let's taint kernel on lockdep complains - that way we will not miss possible problems reported by lockdep. This change is a subject to be rolled back when QA begins to parse kernel logs. Changes from v1: * lockdep disables itself due do a number of reasons, we want to catch all of them => let's taint kernel on disabling lockdep, does not matter due to what exact reason https://jira.sw.ru/browse/PSBM-22010 Signed-off-by: Konstantin Khorenko <khore...@parallels.com> Acked-by: Andrey Vagin <ava...@parallels.com> ============================================================================= Author: Andrey Vagin Email: ava...@openvz.org Subject: lockdep: add tain TAINT_CRAP only once Date: Thu, 23 Jan 2014 17:47:36 +0400 And do it after disabling lockdep. Otherwise we can be caught in a loop, if debug_locks_off will be called from add_taint(). The 'sysctl -w kernel.tainted=0xffffffff' command does that on my host with the 85.6 kernel. Signed-off-by: Andrey Vagin <ava...@openvz.org> ============================================================================= Related to https://jira.sw.ru/browse/PSBM-33650 Signed-off-by: Vladimir Davydov <vdavy...@parallels.com> (cherry picked from vz8 commit 95d1fd47a79db151f2791dde59a070a63e557d7d) Signed-off-by: Andrey Zhadchenko <andrey.zhadche...@virtuozzo.com> --- lib/debug_locks.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/lib/debug_locks.c b/lib/debug_locks.c index a75ee30..234b253 100644 --- a/lib/debug_locks.c +++ b/lib/debug_locks.c @@ -43,6 +43,13 @@ int debug_locks_off(void) console_verbose(); return 1; } + + /* + * We want to taint kernel so tests can easily detect a lockdep + * related problem reported. + */ + + add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); } return 0; } -- 1.8.3.1 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
