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| author | Peter Zijlstra <peterz@infradead.org> | 2017-08-23 13:13:11 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-25 11:06:31 +0200 |
| commit | e91498589746065e3ae95d9a00b068e525eec34f (patch) | |
| tree | 9b7d6663dbfce16abc8cb6228c56dd72e4fff83c /lib/dump_stack.c | |
| parent | mm, locking/barriers: Clarify tlb_flush_pending() barriers (diff) | |
| download | linux-e91498589746065e3ae95d9a00b068e525eec34f.tar.xz linux-e91498589746065e3ae95d9a00b068e525eec34f.zip | |
locking/lockdep/selftests: Add mixed read-write ABBA tests
Currently lockdep has limited support for recursive readers, add a few
mixed read-write ABBA selftests to show the extend of these
limitations.
[ 0.000000] ----------------------------------------------------------------------------
[ 0.000000] | spin |wlock |rlock |mutex | wsem | rsem |
[ 0.000000] --------------------------------------------------------------------------
[ 0.000000] mixed read-lock/lock-write ABBA: |FAILED| | ok |
[ 0.000000] mixed read-lock/lock-read ABBA: | ok | | ok |
[ 0.000000] mixed write-lock/lock-write ABBA: | ok | | ok |
This clearly illustrates the case where lockdep fails to find a
deadlock.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: byungchul.park@lge.com
Cc: david@fromorbit.com
Cc: johannes@sipsolutions.net
Cc: oleg@redhat.com
Cc: tj@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/dump_stack.c')
0 files changed, 0 insertions, 0 deletions