diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2017-03-03 10:13:38 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-10 12:29:03 +0200 |
| commit | d92a8cfcb37ecd1315269dab741f073b63b3a8b6 (patch) | |
| tree | bd081c6309a48d23ae074e2035105be13622b005 /mm/slab.h | |
| parent | a9668cd6ee288c4838bc668880ac085be551cac2 (diff) | |
| download | linux-d92a8cfcb37ecd1315269dab741f073b63b3a8b6.tar.gz linux-d92a8cfcb37ecd1315269dab741f073b63b3a8b6.tar.bz2 linux-d92a8cfcb37ecd1315269dab741f073b63b3a8b6.zip | |
locking/lockdep: Rework FS_RECLAIM annotation
A while ago someone, and I cannot find the email just now, asked if we
could not implement the RECLAIM_FS inversion stuff with a 'fake' lock
like we use for other things like workqueues etc. I think this should
be possible which allows reducing the 'irq' states and will reduce the
amount of __bfs() lookups we do.
Removing the 1 IRQ state results in 4 less __bfs() walks per
dependency, improving lockdep performance. And by moving this
annotation out of the lockdep code it becomes easier for the mm people
to extend.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Nikolay Borisov <nborisov@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: akpm@linux-foundation.org
Cc: boqun.feng@gmail.com
Cc: iamjoonsoo.kim@lge.com
Cc: kernel-team@lge.com
Cc: kirill@shutemov.name
Cc: npiggin@gmail.com
Cc: walken@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/slab.h')
| -rw-r--r-- | mm/slab.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/slab.h b/mm/slab.h index 6885e1192ec5..073362816acc 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -43,6 +43,7 @@ struct kmem_cache { #include <linux/kasan.h> #include <linux/kmemleak.h> #include <linux/random.h> +#include <linux/sched/mm.h> /* * State of the slab allocator. @@ -412,7 +413,10 @@ static inline struct kmem_cache *slab_pre_alloc_hook(struct kmem_cache *s, gfp_t flags) { flags &= gfp_allowed_mask; - lockdep_trace_alloc(flags); + + fs_reclaim_acquire(flags); + fs_reclaim_release(flags); + might_sleep_if(gfpflags_allow_blocking(flags)); if (should_failslab(s, flags)) |