The patch titled
Subject: slab-fix-oops-when-reading-proc-slab_allocators-v2
has been added to the -mm tree. Its filename is
slab-fix-oops-when-reading-proc-slab_allocators-v2.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/slab-fix-oops-when-reading-proc-slab_allocators-v2.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/slab-fix-oops-when-reading-proc-slab_allocators-v2.patch
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------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: slab-fix-oops-when-reading-proc-slab_allocators-v2
v2: edit one more function, calculate_slab_order(), that wants to know
how much space per object is spent for freelist management.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Reported-by: Dave Jones <davej@xxxxxxxxxx>
Reported-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN mm/slab.c~slab-fix-oops-when-reading-proc-slab_allocators-v2 mm/slab.c
--- a/mm/slab.c~slab-fix-oops-when-reading-proc-slab_allocators-v2
+++ a/mm/slab.c
@@ -2093,13 +2093,16 @@ static size_t calculate_slab_order(struc
break;
if (flags & CFLGS_OFF_SLAB) {
+ size_t freelist_size_per_obj = sizeof(freelist_idx_t);
/*
* Max number of objs-per-slab for caches which
* use off-slab slabs. Needed to avoid a possible
* looping condition in cache_grow().
*/
+ if (IS_ENABLED(CONFIG_DEBUG_SLAB_LEAK))
+ freelist_size_per_obj += sizeof(char);
offslab_limit = size;
- offslab_limit /= sizeof(freelist_idx_t);
+ offslab_limit /= freelist_size_per_obj;
if (num > offslab_limit)
break;
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
slab-maintainer-update.patch
slab-fix-oops-when-reading-proc-slab_allocators.patch
slab-fix-oops-when-reading-proc-slab_allocators-v2.patch
dma-cma-fix-possible-memory-leak.patch
mm-slabc-add-__init-to-init_lock_keys.patch
slab-common-add-functions-for-kmem_cache_node-access.patch
slub-use-new-node-functions.patch
slub-use-new-node-functions-fix.patch
slab-use-get_node-and-kmem_cache_node-functions.patch
slab-use-get_node-and-kmem_cache_node-functions-fix.patch
mm-slabh-wrap-the-whole-file-with-guarding-macro.patch
mm-slab-mark-enable_cpucache-as-init-text.patch
mm-slub-mark-resiliency_test-as-init-text.patch
vmalloc-use-rcu-list-iterator-to-reduce-vmap_area_lock-contention.patch
memcg-cleanup-memcg_cache_params-refcnt-usage.patch
memcg-destroy-kmem-caches-when-last-slab-is-freed.patch
memcg-mark-caches-that-belong-to-offline-memcgs-as-dead.patch
slub-dont-fail-kmem_cache_shrink-if-slab-placement-optimization-fails.patch
slub-make-slab_free-non-preemptable.patch
memcg-wait-for-kfrees-to-finish-before-destroying-cache.patch
slub-make-dead-memcg-caches-discard-free-slabs-immediately.patch
slab-do-not-keep-free-objects-slabs-on-dead-memcg-caches.patch
dma-cma-separate-core-cma-management-codes-from-dma-apis.patch
dma-cma-support-alignment-constraint-on-cma-region.patch
dma-cma-support-arbitrary-bitmap-granularity.patch
dma-cma-support-arbitrary-bitmap-granularity-fix.patch
cma-generalize-cma-reserved-area-management-functionality.patch
ppc-kvm-cma-use-general-cma-reserved-area-management-framework.patch
mm-cma-clean-up-cma-allocation-error-path.patch
mm-cma-change-cma_declare_contiguous-to-obey-coding-convention.patch
mm-cma-clean-up-log-message.patch
mm-compactionc-isolate_freepages_block-small-tuneup.patch
page-owners-correct-page-order-when-to-free-page.patch
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