iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] lockdep: use chain hash on CONFIG_DEBUG_LOCKDEP too

Browse Source 
CONFIG_DEBUG_LOCKDEP is unacceptably slow because it does not utilize
the chain-hash. Turn the chain-hash back on in this case too.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-12-13 00:34:42 -08:00 committed by Linus Torvalds
parent 33e94e960b
commit 27c3b23226
1 changed files with 0 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/lockdep.c
View File

@ -1276,14 +1276,6 @@ static inline int lookup_chain_cache(u64 chain_key, struct lock_class *class)
if (chain->chain_key == chain_key) { if (chain->chain_key == chain_key) {
cache_hit: cache_hit:
debug_atomic_inc(&chain_lookup_hits); debug_atomic_inc(&chain_lookup_hits);
/*
* In the debugging case, force redundant checking
* by returning 1:
*/
#ifdef CONFIG_DEBUG_LOCKDEP
__raw_spin_lock(&hash_lock);
return 1;
#endif
if (very_verbose(class)) if (very_verbose(class))
printk("\nhash chain already cached, key: %016Lx tail class: [%p] %s\n", chain_key, class->key, class->name); printk("\nhash chain already cached, key: %016Lx tail class: [%p] %s\n", chain_key, class->key, class->name);
return 0; return 0;