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| author | Christoph Lameter <cl@linux.com> | 2011-05-05 15:23:54 -0500 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2011-05-07 20:25:38 +0300 |
| commit | 1759415e630e5db0dd2390df9f94892cbfb9a8a2 (patch) | |
| tree | bfae4443c70ee88c54aa9743ca19ed122af45f8f /include/linux/slub_def.h | |
| parent | 8dc16c6c04b1a82d00a8464ccc08e1fe17d0ff82 (diff) | |
| download | op-kernel-dev-1759415e630e5db0dd2390df9f94892cbfb9a8a2.zip op-kernel-dev-1759415e630e5db0dd2390df9f94892cbfb9a8a2.tar.gz | |
slub: Remove CONFIG_CMPXCHG_LOCAL ifdeffery
Remove the #ifdefs. This means that the irqsafe_cpu_cmpxchg_double() is used
everywhere.
There may be performance implications since:
A. We now have to manage a transaction ID for all arches
B. The interrupt holdoff for arches not supporting CONFIG_CMPXCHG_LOCAL is reduced
to a very short irqoff section.
There are no multiple irqoff/irqon sequences as a result of this change. Even in the fallback
case we only have to do one disable and enable like before.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slub_def.h')
| -rw-r--r-- | include/linux/slub_def.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index 45ca123..ca0c076 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -37,9 +37,7 @@ enum stat_item { struct kmem_cache_cpu { void **freelist; /* Pointer to next available object */ -#ifdef CONFIG_CMPXCHG_LOCAL unsigned long tid; /* Globally unique transaction id */ -#endif struct page *page; /* The slab from which we are allocating */ int node; /* The node of the page (or -1 for debug) */ #ifdef CONFIG_SLUB_STATS |
