The patch titled
Subject: slab: avoid running debug SLAB code with IRQs disabled for alloc_bulk
has been removed from the -mm tree. Its filename was
slab-avoid-running-debug-slab-code-with-irqs-disabled-for-alloc_bulk.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Subject: slab: avoid running debug SLAB code with IRQs disabled for alloc_bulk
Move the call to cache_alloc_debugcheck_after() outside the IRQ disabled
section in kmem_cache_alloc_bulk().
When CONFIG_DEBUG_SLAB is disabled the compiler should remove this code.
Signed-off-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff -puN mm/slab.c~slab-avoid-running-debug-slab-code-with-irqs-disabled-for-alloc_bulk mm/slab.c
--- a/mm/slab.c~slab-avoid-running-debug-slab-code-with-irqs-disabled-for-alloc_bulk
+++ a/mm/slab.c
@@ -3391,6 +3391,16 @@ void kmem_cache_free_bulk(struct kmem_ca
}
EXPORT_SYMBOL(kmem_cache_free_bulk);
+static __always_inline void
+cache_alloc_debugcheck_after_bulk(struct kmem_cache *s, gfp_t flags,
+ size_t size, void **p, unsigned long caller)
+{
+ size_t i;
+
+ for (i = 0; i < size; i++)
+ p[i] = cache_alloc_debugcheck_after(s, flags, p[i], caller);
+}
+
int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
void **p)
{
@@ -3406,15 +3416,14 @@ int kmem_cache_alloc_bulk(struct kmem_ca
for (i = 0; i < size; i++) {
void *objp = __do_cache_alloc(s, flags);
- /* this call could be done outside IRQ disabled section */
- objp = cache_alloc_debugcheck_after(s, flags, objp, _RET_IP_);
-
if (unlikely(!objp))
goto error;
p[i] = objp;
}
local_irq_enable();
+ cache_alloc_debugcheck_after_bulk(s, flags, size, p, _RET_IP_);
+
/* Clear memory outside IRQ disabled section */
if (unlikely(flags & __GFP_ZERO))
for (i = 0; i < size; i++)
@@ -3425,6 +3434,7 @@ int kmem_cache_alloc_bulk(struct kmem_ca
return size;
error:
local_irq_enable();
+ cache_alloc_debugcheck_after_bulk(s, flags, i, p, _RET_IP_);
slab_post_alloc_hook(s, flags, i, p);
__kmem_cache_free_bulk(s, i, p);
return 0;
_
Patches currently in -mm which might be from brouer@xxxxxxxxxx are
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