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locking/selftests: More granular debug_locks_verbose 

Showing all tests all the time is tiresome.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Peter Zijlstra 2020-12-09 16:42:57 +01:00
parent 9271a40d2a
commit 5831c0f71d
2 changed files with 9 additions and 7 deletions
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11
Documentation/admin-guide/kernel-parameters.txt
View File

@ -802,13 +802,14 @@
insecure, please do not use on production kernels.
debug_locks_verbose=
[KNL] verbose self-tests
Format=<0|1>
[KNL] verbose locking self-tests
Format: <int>
Print debugging info while doing the locking API
self-tests.
We default to 0 (no extra messages), setting it to
1 will print _a lot_ more information - normally
only useful to kernel developers.
Bitmask for the various LOCKTYPE_ tests. Defaults to 0
(no extra messages), setting it to -1 (all bits set)
will print _a_lot_ more information - normally only
useful to lockdep developers.
debug_objects [KNL] Enable object debugging

5
lib/locking-selftest.c
View File

@ -1390,6 +1390,8 @@ static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
WARN_ON(irqs_disabled());
debug_locks_silent = !(debug_locks_verbose & lockclass_mask);
testcase_fn();
/*
* Filter out expected failures:
@ -1410,7 +1412,7 @@ static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
}
testcase_total++;
if (debug_locks_verbose)
if (debug_locks_verbose & lockclass_mask)
pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
lockclass_mask, debug_locks, expected);
/*
@ -2674,7 +2676,6 @@ void locking_selftest(void)
printk(" --------------------------------------------------------------------------\n");
init_shared_classes();
debug_locks_silent = !debug_locks_verbose;
lockdep_set_selftest_task(current);
DO_TESTCASE_6R("A-A deadlock", AA);