The patch titled
Subject: mm/slub.c: remove validation on cpu_slab in __flush_cpu_slab()
has been added to the -mm tree. Its filename is
mm-slub-remove-validation-on-cpu_slab-in-__flush_cpu_slab.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-slub-remove-validation-on-cpu_slab-in-__flush_cpu_slab.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-remove-validation-on-cpu_slab-in-__flush_cpu_slab.patch
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/slub.c: remove validation on cpu_slab in __flush_cpu_slab()
cpu_slab is a per cpu variable which is allocated in all or none. If a
cpu_slab failed to be allocated, the slub is not usable.
We could use cpu_slab without validation in __flush_cpu_slab().
Link: http://lkml.kernel.org/r/20181103141218.22844-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/mm/slub.c~mm-slub-remove-validation-on-cpu_slab-in-__flush_cpu_slab
+++ a/mm/slub.c
@@ -2313,12 +2313,10 @@ static inline void __flush_cpu_slab(stru
{
struct kmem_cache_cpu *c = per_cpu_ptr(s->cpu_slab, cpu);
- if (likely(c)) {
- if (c->page)
- flush_slab(s, c);
+ if (c->page)
+ flush_slab(s, c);
- unfreeze_partials(s, c);
- }
+ unfreeze_partials(s, c);
}
static void flush_cpu_slab(void *d)
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-slub-remove-validation-on-cpu_slab-in-__flush_cpu_slab.patch
