diff options
| author | Waiman Long <longman@redhat.com> | 2020-02-06 18:24:06 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-02-11 15:10:50 +0300 |
| commit | 836bd74b5957779171c9648e9e29145fc089fffe (patch) | |
| tree | dba3face57c6512c2408c472d9dcb4281a3e1427 /kernel/locking/lockdep_internals.h | |
| parent | 1d44bcb4fdb650b2a57c9ff593a4d246a10ad801 (diff) | |
| download | linux-836bd74b5957779171c9648e9e29145fc089fffe.tar.xz | |
locking/lockdep: Throw away all lock chains with zapped class
If a lock chain contains a class that is zapped, the whole lock chain is
likely to be invalid. If the zapped class is at the end of the chain,
the partial chain without the zapped class should have been stored
already as the current code will store all its predecessor chains. If
the zapped class is somewhere in the middle, there is no guarantee that
the partial chain will actually happen. It may just clutter up the hash
and make searching slower. I would rather prefer storing the chain only
when it actually happens.
So just dump the corresponding chain_hlocks entries for now. A latter
patch will try to reuse the freed chain_hlocks entries.
This patch also changes the type of nr_chain_hlocks to unsigned integer
to be consistent with the other counters.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200206152408.24165-5-longman@redhat.com
Diffstat (limited to 'kernel/locking/lockdep_internals.h')
| -rw-r--r-- | kernel/locking/lockdep_internals.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h index 76db80446a32..926bfa4b4564 100644 --- a/kernel/locking/lockdep_internals.h +++ b/kernel/locking/lockdep_internals.h @@ -134,14 +134,14 @@ extern unsigned long nr_zapped_classes; extern unsigned long nr_list_entries; long lockdep_next_lockchain(long i); unsigned long lock_chain_count(void); -extern int nr_chain_hlocks; extern unsigned long nr_stack_trace_entries; extern unsigned int nr_hardirq_chains; extern unsigned int nr_softirq_chains; extern unsigned int nr_process_chains; -extern unsigned int max_lockdep_depth; +extern unsigned int nr_chain_hlocks; +extern unsigned int max_lockdep_depth; extern unsigned int max_bfs_queue_depth; #ifdef CONFIG_PROVE_LOCKING |