The patch titled
SLUB: CONFIG_LARGE_ALLOCS must consider MAX_ORDER limit
has been added to the -mm tree. Its filename is
slub-config_large_allocs-must-consider-max_order-limit.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: SLUB: CONFIG_LARGE_ALLOCS must consider MAX_ORDER limit
From: Christoph Lameter <clameter@xxxxxxx>
Take MAX_ORDER into consideration when determining KMALLOC_SHIFT_HIGH.
Otherwise we may run into a situation where we attempt to create general
slabs larger than MAX_ORDER.
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/slub_def.h | 6 +++++-
1 files changed, 5 insertions(+), 1 deletion(-)
diff -puN include/linux/slub_def.h~slub-config_large_allocs-must-consider-max_order-limit include/linux/slub_def.h
--- a/include/linux/slub_def.h~slub-config_large_allocs-must-consider-max_order-limit
+++ a/include/linux/slub_def.h
@@ -60,7 +60,8 @@ struct kmem_cache {
#define KMALLOC_SHIFT_LOW 3
#ifdef CONFIG_LARGE_ALLOCS
-#define KMALLOC_SHIFT_HIGH 25
+#define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT) =< 25 ? \
+ MAX_ORDER + PAGE_SHIFT - 1 : 25)
#else
#if !defined(CONFIG_MMU) || NR_CPUS > 512 || MAX_NUMNODES > 256
#define KMALLOC_SHIFT_HIGH 20
@@ -87,6 +88,9 @@ static inline int kmalloc_index(int size
*/
WARN_ON_ONCE(size == 0);
+ if (size >= (1UL << KMALLOC_SHIFT_HIGH))
+ return -1;
+
if (size > 64 && size <= 96)
return 1;
if (size > 128 && size <= 192)
_
Patches currently in -mm which might be from clameter@xxxxxxx are
slub-config_large_allocs-must-consider-max_order-limit.patch
slub-config_large_allocs-must-consider-max_order-limit-fix.patch
git-ubi.patch
quicklist-support-for-x86_64.patch
slab-allocators-drop-support-for-destructors.patch
remove-slab_ctor_constructor.patch
remove-constructor-from-buffer_head.patch
remove-slab_ctor_constructor-fix.patch
slub-remove-depends-on-experimental-and-arch_uses_slab_page_struct.patch
change-zonelist-order-zonelist-order-selection-logic.patch
change-zonelist-order-v6-zonelist-fix.patch
change-zonelist-order-auto-configuration.patch
change-zonelist-order-documentaion.patch
group-short-lived-and-reclaimable-kernel-allocations-use-slab_account_reclaim-to-determine-when-__gfp_reclaimable-should-be-used.patch
group-short-lived-and-reclaimable-kernel-allocations-use-slab_account_reclaim-to-determine-when-__gfp_reclaimable-should-be-used-fix.patch
slub-mm-only-make-slub-the-default-slab-allocator.patch
slub-exploit-page-mobility-to-increase-allocation-order.patch
slub-reduce-antifrag-max-order.patch
slub-reduce-antifrag-max-order-use-antifrag-constant-instead-of-hardcoding-page-order.patch
define-percpu-smp-cacheline-align-interface.patch
call-percpu-smp-cacheline-algin-interface.patch
mm-implement-swap-prefetching.patch
revoke-core-code.patch
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