* [PATCH slab/for-next-fixes v2 2/3] mm/slab: decouple SLAB_NO_SHEAVES from SLAB_NO_OBJ_EXT
2026-07-10 6:03 [PATCH slab/for-next-fixes v2 0/3] mm/slab: fix unbounded recursion in free path with memalloc profiling Harry Yoo (Oracle)
2026-07-10 6:03 ` [PATCH slab/for-next-fixes v2 1/3] mm/slab: fix a memory leak due to bootstrapping sheaves twice Harry Yoo (Oracle)
@ 2026-07-10 6:03 ` Harry Yoo (Oracle)
2026-07-10 6:03 ` [PATCH slab/for-next-fixes v2 3/3] mm/slab: prevent unbounded recursion in free path with new kmalloc type Harry Yoo (Oracle)
2026-07-10 13:07 ` [PATCH slab/for-next-fixes v2 0/3] mm/slab: fix unbounded recursion in free path with memalloc profiling Vlastimil Babka (SUSE)
3 siblings, 0 replies; 6+ messages in thread
From: Harry Yoo (Oracle) @ 2026-07-10 6:03 UTC (permalink / raw)
To: Vlastimil Babka, Andrew Morton, Hao Li, Christoph Lameter,
David Rientjes, Roman Gushchin, Suren Baghdasaryan, Hao Ge,
Kees Cook, Pedro Falcato, Shakeel Butt, Danielle Constantino,
Liam R. Howlett
Cc: linux-mm, linux-kernel, Harry Yoo (Oracle)
Bootstrap caches are created with SLAB_NO_OBJ_EXT to disallow sheaves
and obj_exts.
To allow disabling obj_exts while allowing sheaves, decouple
SLAB_NO_SHEAVES from SLAB_NO_OBJ_EXT. Bootstrap caches now have both
SLAB_NO_SHEAVES and SLAB_NO_OBJ_EXT.
No functional change intended.
Cc: stable@vger.kernel.org
Fixes: e47c897a2949 ("slab: add sheaves to most caches")
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Signed-off-by: Harry Yoo (Oracle) <harry@kernel.org>
---
include/linux/slab.h | 13 +++++++++++--
mm/slub.c | 10 ++++++----
2 files changed, 17 insertions(+), 6 deletions(-)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 51f03f18c9a7..08d7b6c9c4d6 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -58,10 +58,13 @@ enum _slab_flag_bits {
#endif
_SLAB_OBJECT_POISON,
_SLAB_CMPXCHG_DOUBLE,
+#ifdef CONFIG_SLAB_OBJ_EXT
_SLAB_NO_OBJ_EXT,
-#if defined(CONFIG_SLAB_OBJ_EXT) && defined(CONFIG_64BIT)
+#ifdef CONFIG_64BIT
_SLAB_OBJ_EXT_IN_OBJ,
#endif
+#endif
+ _SLAB_NO_SHEAVES,
_SLAB_FLAGS_LAST_BIT
};
@@ -239,8 +242,14 @@ enum _slab_flag_bits {
#endif
#define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */
-/* Slab created using create_boot_cache */
+/* Slab caches without obj_exts array */
+#ifdef CONFIG_SLAB_OBJ_EXT
#define SLAB_NO_OBJ_EXT __SLAB_FLAG_BIT(_SLAB_NO_OBJ_EXT)
+#else
+#define SLAB_NO_OBJ_EXT __SLAB_FLAG_UNUSED
+#endif
+
+#define SLAB_NO_SHEAVES __SLAB_FLAG_BIT(_SLAB_NO_SHEAVES)
#if defined(CONFIG_SLAB_OBJ_EXT) && defined(CONFIG_64BIT)
#define SLAB_OBJ_EXT_IN_OBJ __SLAB_FLAG_BIT(_SLAB_OBJ_EXT_IN_OBJ)
diff --git a/mm/slub.c b/mm/slub.c
index f9461a0c47d3..abe748b7dddb 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -7799,12 +7799,12 @@ static unsigned int calculate_sheaf_capacity(struct kmem_cache *s,
return 0;
/*
- * Bootstrap caches can't have sheaves for now (SLAB_NO_OBJ_EXT).
+ * Bootstrap caches can't have sheaves for now (SLAB_NO_SHEAVES).
* SLAB_NOLEAKTRACE caches (e.g., kmemleak's object_cache) must not
* have sheaves to avoid recursion when sheaf allocation triggers
* kmemleak tracking.
*/
- if (s->flags & (SLAB_NO_OBJ_EXT | SLAB_NOLEAKTRACE))
+ if (s->flags & (SLAB_NO_SHEAVES | SLAB_NOLEAKTRACE))
return 0;
/*
@@ -8586,7 +8586,8 @@ void __init kmem_cache_init(void)
create_boot_cache(kmem_cache_node, "kmem_cache_node",
sizeof(struct kmem_cache_node),
- SLAB_HWCACHE_ALIGN | SLAB_NO_OBJ_EXT, 0, 0);
+ SLAB_HWCACHE_ALIGN | SLAB_NO_SHEAVES | SLAB_NO_OBJ_EXT,
+ 0, 0);
hotplug_node_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
@@ -8596,7 +8597,8 @@ void __init kmem_cache_init(void)
create_boot_cache(kmem_cache, "kmem_cache",
offsetof(struct kmem_cache, per_node) +
nr_node_ids * sizeof(struct kmem_cache_per_node_ptrs),
- SLAB_HWCACHE_ALIGN | SLAB_NO_OBJ_EXT, 0, 0);
+ SLAB_HWCACHE_ALIGN | SLAB_NO_SHEAVES | SLAB_NO_OBJ_EXT,
+ 0, 0);
kmem_cache = bootstrap(&boot_kmem_cache);
kmem_cache_node = bootstrap(&boot_kmem_cache_node);
--
2.53.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH slab/for-next-fixes v2 3/3] mm/slab: prevent unbounded recursion in free path with new kmalloc type
2026-07-10 6:03 [PATCH slab/for-next-fixes v2 0/3] mm/slab: fix unbounded recursion in free path with memalloc profiling Harry Yoo (Oracle)
2026-07-10 6:03 ` [PATCH slab/for-next-fixes v2 1/3] mm/slab: fix a memory leak due to bootstrapping sheaves twice Harry Yoo (Oracle)
2026-07-10 6:03 ` [PATCH slab/for-next-fixes v2 2/3] mm/slab: decouple SLAB_NO_SHEAVES from SLAB_NO_OBJ_EXT Harry Yoo (Oracle)
@ 2026-07-10 6:03 ` Harry Yoo (Oracle)
2026-07-10 13:07 ` [PATCH slab/for-next-fixes v2 0/3] mm/slab: fix unbounded recursion in free path with memalloc profiling Vlastimil Babka (SUSE)
3 siblings, 0 replies; 6+ messages in thread
From: Harry Yoo (Oracle) @ 2026-07-10 6:03 UTC (permalink / raw)
To: Vlastimil Babka, Andrew Morton, Hao Li, Christoph Lameter,
David Rientjes, Roman Gushchin, Suren Baghdasaryan, Hao Ge,
Kees Cook, Pedro Falcato, Shakeel Butt, Danielle Constantino,
Liam R. Howlett
Cc: linux-mm, linux-kernel, Harry Yoo (Oracle)
Commit 280ea9c3154b ("mm/slab: avoid allocating slabobj_ext array from
its own slab") avoided recursive allocation of obj_exts from kmalloc
caches of the same size, by bumping the obj_exts array's allocation
size whenever the array size equals the size of the object being
allocated.
However, as reported by Danielle Costantino and Shakeel Butt,
even slabs from kmalloc caches of different sizes can form a cycle
by allocating obj_exts arrays from each other [1]:
What happened: a KMALLOC_NORMAL slab's obj_exts array (used by
allocation profiling / memcg accounting) is itself kmalloc()'d from a
KMALLOC_NORMAL cache, so the "slab holds another slab's obj_exts array"
relation can form cycles. With sizeof(struct slabobj_ext) == 16 and
the host's geometry:
- kmalloc-512 has 64 objects/slab -> array is 64*16 == 1024 bytes,
served from kmalloc-1k;
- kmalloc-1k has 32 objects/slab -> array is 32*16 == 512 bytes,
served from kmalloc-512.
A kmalloc-512 slab and a kmalloc-1k slab therefore hold each other's
obj_exts array. Discarding one frees the other's array, which empties
and discards that slab, which frees the first's array, and so on:
__free_slab() -> free_slab_obj_exts() -> kfree() -> discard_slab() ->
__free_slab() recurses along the cycle until the stack is exhausted.
With memory allocation profiling, this allows unbounded recursion
in the free path and led to a stack overflow on a production host in
the Meta fleet [1]:
BUG: TASK stack guard page was hit
Oops: stack guard page
RIP: 0010:kfree+0x8/0x5d0
Call Trace:
__free_slab+0x66/0xc0
kfree+0x3f0/0x5d0
... ( ~125x __free_slab <-> kfree ) ...
<kernel driver freeing a resource>
do_syscall_64
It is proposed [1] to resolve this issue by always serving the obj_exts
array allocation from kmalloc caches (or large kmalloc) of sizes larger
than the object size. However, as pointed out by Vlastimil Babka [2],
this can waste an excessive amount of memory as slabs from large
kmalloc sizes (e.g. kmalloc-8k) generally need obj_exts arrays much
smaller than the object size.
Therefore, rather than bumping the size, let us take a different
approach; disallow formation of cycles between kmalloc types when
allocating obj_exts arrays. Currently, all obj_exts arrays are served
from normal kmalloc caches. Cycles cannot be created if obj_exts arrays
of normal kmalloc caches are served from a special kmalloc type that can
never have obj_exts arrays.
To achieve this, create a new kmalloc type called KMALLOC_NO_OBJ_EXT.
KMALLOC_NO_OBJ_EXT caches are created when CONFIG_SLAB_OBJ_EXT is
enabled, and they have SLAB_NO_OBJ_EXT flag to prevent allocation
of obj_exts arrays. They remain unused until allocation of obj_exts
arrays for normal kmalloc caches happens.
Sheaf bootstrapping for KMALLOC_NO_OBJ_EXT caches now must be deferred
because allocation of a barn can trigger obj_exts array allocation of
normal kmalloc caches when the KMALLOC_NO_OBJ_EXT cache for that size
is not ready yet. For simplicity, perform bootstrapping of sheaves for
all kmalloc caches later.
Introduce a new slab alloc flag, SLAB_ALLOC_NO_OBJ_EXT, to prevent
allocation of obj_exts arrays, and let kmalloc_slab() override the type
to KMALLOC_NO_OBJ_EXT when specified. Note that kmalloc_type() remains
unchanged because kmalloc_flags() bypasses the kmalloc fastpath.
Do not pass SLAB_ALLOC_NO_RECURSE to kmalloc_flags() in
alloc_slab_obj_exts() and instead use SLAB_ALLOC_NO_OBJ_EXT only when
the objects are allocated from normal kmalloc caches. While this
prevents unbounded recursive allocation of obj_exts, it allows
KMALLOC_NO_OBJ_EXT caches to have sheaves.
Since sheaf allocations specify SLAB_ALLOC_NO_RECURSE that prevents
allocation of both sheaves and obj_exts arrays, the recursion depth
is bounded.
obj_exts arrays for non-kmalloc-normal caches can now have a valid tag.
Do not call mark_obj_codetag_empty() when freeing an obj_exts array to
avoid false warnings. KMALLOC_NO_OBJ_EXT don't need this as they never
allocate those arrays.
Reported-by: Danielle Costantino <dcostantino@meta.com>
Reported-by: Shakeel Butt <shakeel.butt@linux.dev>
Closes: https://lore.kernel.org/linux-mm/20260625230029.703750-1-shakeel.butt@linux.dev [1]
Fixes: 4b8736964640 ("mm/slab: add allocation accounting into slab allocation and free paths")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-mm/c5c4208d-a6f0-413e-bad9-49be12f12d55@kernel.org [2]
Signed-off-by: Harry Yoo (Oracle) <harry@kernel.org>
---
include/linux/slab.h | 3 ++
mm/slab.h | 15 +++++++--
mm/slab_common.c | 18 ++++++++++-
mm/slub.c | 90 +++++++++++++++++++---------------------------------
4 files changed, 64 insertions(+), 62 deletions(-)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 08d7b6c9c4d6..0c1d13773523 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -721,6 +721,9 @@ enum kmalloc_cache_type {
#endif
#ifdef CONFIG_MEMCG
KMALLOC_CGROUP,
+#endif
+#ifdef CONFIG_SLAB_OBJ_EXT
+ KMALLOC_NO_OBJ_EXT,
#endif
NR_KMALLOC_TYPES
};
diff --git a/mm/slab.h b/mm/slab.h
index 281a65233795..7bce162699b7 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -22,6 +22,7 @@
#define SLAB_ALLOC_NOLOCK 0x01 /* a kmalloc_nolock() allocation */
#define SLAB_ALLOC_NEW_SLAB 0x02 /* a flag for alloc_slab_obj_exts() */
#define SLAB_ALLOC_NO_RECURSE 0x04 /* prevent kmalloc() recursion */
+#define SLAB_ALLOC_NO_OBJ_EXT 0x08 /* prevent obj_exts array allocation */
static inline bool alloc_flags_allow_spinning(const unsigned int alloc_flags)
{
@@ -386,12 +387,19 @@ static inline unsigned int size_index_elem(unsigned int bytes)
* KMALLOC_MAX_CACHE_SIZE and the caller must check that.
*/
static inline struct kmem_cache *
-kmalloc_slab(size_t size, kmem_buckets *b, gfp_t flags, kmalloc_token_t token)
+kmalloc_slab(size_t size, kmem_buckets *b, gfp_t flags, kmalloc_token_t token,
+ unsigned int alloc_flags)
{
unsigned int index;
+ enum kmalloc_cache_type type = kmalloc_type(flags, token);
+
+#ifdef CONFIG_SLAB_OBJ_EXT
+ if (alloc_flags & SLAB_ALLOC_NO_OBJ_EXT)
+ type = KMALLOC_NO_OBJ_EXT;
+#endif
if (!b)
- b = &kmalloc_caches[kmalloc_type(flags, token)];
+ b = &kmalloc_caches[type];
if (size <= 192)
index = kmalloc_size_index[size_index_elem(size)];
else
@@ -426,7 +434,8 @@ static inline bool is_kmalloc_normal(struct kmem_cache *s)
{
if (!is_kmalloc_cache(s))
return false;
- return !(s->flags & (SLAB_CACHE_DMA|SLAB_ACCOUNT|SLAB_RECLAIM_ACCOUNT));
+
+ return !(s->flags & (SLAB_CACHE_DMA|SLAB_ACCOUNT|SLAB_RECLAIM_ACCOUNT|SLAB_NO_OBJ_EXT));
}
bool __kfree_rcu_sheaf(struct kmem_cache *s, void *obj);
diff --git a/mm/slab_common.c b/mm/slab_common.c
index b6426d7ceec9..7f262134d0f2 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -783,11 +783,15 @@ u8 kmalloc_size_index[24] __ro_after_init = {
size_t kmalloc_size_roundup(size_t size)
{
if (size && size <= KMALLOC_MAX_CACHE_SIZE) {
+ struct kmem_cache *s;
+
/*
* The flags don't matter since size_index is common to all.
* Neither does the caller for just getting ->object_size.
*/
- return kmalloc_slab(size, NULL, GFP_KERNEL, __kmalloc_token(0))->object_size;
+ s = kmalloc_slab(size, NULL, GFP_KERNEL, __kmalloc_token(0),
+ SLAB_ALLOC_DEFAULT);
+ return s->object_size;
}
/* Above the smaller buckets, size is a multiple of page size. */
@@ -843,6 +847,12 @@ EXPORT_SYMBOL(kmalloc_size_roundup);
#define KMALLOC_PARTITION_NAME(N, sz)
#endif
+#ifdef CONFIG_SLAB_OBJ_EXT
+#define KMALLOC_NO_OBJ_EXT_NAME(sz) .name[KMALLOC_NO_OBJ_EXT] = "kmalloc-no-objext-" #sz,
+#else
+#define KMALLOC_NO_OBJ_EXT_NAME(sz)
+#endif
+
#define INIT_KMALLOC_INFO(__size, __short_size) \
{ \
.name[KMALLOC_NORMAL] = "kmalloc-" #__short_size, \
@@ -850,6 +860,7 @@ EXPORT_SYMBOL(kmalloc_size_roundup);
KMALLOC_CGROUP_NAME(__short_size) \
KMALLOC_DMA_NAME(__short_size) \
KMALLOC_PARTITION_NAME(KMALLOC_PARTITION_CACHES_NR, __short_size) \
+ KMALLOC_NO_OBJ_EXT_NAME(__short_size) \
.size = __size, \
}
@@ -966,6 +977,11 @@ new_kmalloc_cache(int idx, enum kmalloc_cache_type type)
flags |= SLAB_NO_MERGE;
#endif
+#ifdef CONFIG_SLAB_OBJ_EXT
+ if (type == KMALLOC_NO_OBJ_EXT)
+ flags |= SLAB_NO_OBJ_EXT | SLAB_NO_MERGE;
+#endif
+
/*
* If CONFIG_MEMCG is enabled, disable cache merging for
* KMALLOC_NORMAL caches.
diff --git a/mm/slub.c b/mm/slub.c
index abe748b7dddb..0337e60db5ac 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2123,42 +2123,6 @@ static inline void init_slab_obj_exts(struct slab *slab)
slab->obj_exts = 0;
}
-/*
- * Calculate the allocation size for slabobj_ext array.
- *
- * When memory allocation profiling is enabled, the obj_exts array
- * could be allocated from the same slab cache it's being allocated for.
- * This would prevent the slab from ever being freed because it would
- * always contain at least one allocated object (its own obj_exts array).
- *
- * To avoid this, increase the allocation size when we detect the array
- * may come from the same cache, forcing it to use a different cache.
- */
-static inline size_t obj_exts_alloc_size(struct kmem_cache *s,
- struct slab *slab, gfp_t gfp)
-{
- size_t sz = sizeof(struct slabobj_ext) * slab->objects;
- struct kmem_cache *obj_exts_cache;
-
- if (sz > KMALLOC_MAX_CACHE_SIZE)
- return sz;
-
- if (!is_kmalloc_normal(s))
- return sz;
-
- obj_exts_cache = kmalloc_slab(sz, NULL, gfp, __kmalloc_token(0));
- /*
- * We can't simply compare s with obj_exts_cache, because partitioned kmalloc
- * caches have multiple caches per size, selected by caller address or type.
- * Since caller address or type may differ between kmalloc_slab() and actual
- * allocation, bump size when sizes are equal.
- */
- if (s->object_size == obj_exts_cache->object_size)
- return obj_exts_cache->object_size + 1;
-
- return sz;
-}
-
int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
gfp_t gfp, unsigned int alloc_flags)
{
@@ -2168,14 +2132,18 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
unsigned long new_exts;
unsigned long old_exts;
struct slabobj_ext *vec;
- size_t sz;
+ size_t sz = sizeof(struct slabobj_ext) * slab->objects;
gfp &= ~OBJCGS_CLEAR_MASK;
- /* Prevent recursive extension vector allocation */
- alloc_flags |= SLAB_ALLOC_NO_RECURSE;
- alloc_flags &= ~SLAB_ALLOC_NEW_SLAB;
+ /*
+ * In most cases, obj_exts arrays are allocated from normal kmalloc.
+ * However, normal kmalloc caches must allocate them from
+ * KMALLOC_NO_OBJ_EXT caches to prevent recursion.
+ */
+ if (is_kmalloc_normal(s))
+ alloc_flags |= SLAB_ALLOC_NO_OBJ_EXT;
- sz = obj_exts_alloc_size(s, slab, gfp);
+ alloc_flags &= ~SLAB_ALLOC_NEW_SLAB;
/* This will use kmalloc_nolock() if alloc_flags say so */
vec = kmalloc_flags(sz, gfp | __GFP_ZERO, alloc_flags, slab_nid(slab));
@@ -2193,8 +2161,21 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
return -ENOMEM;
}
- VM_WARN_ON_ONCE(virt_to_slab(vec) != NULL &&
- virt_to_slab(vec)->slab_cache == s);
+ if (IS_ENABLED(CONFIG_DEBUG_VM)) {
+ struct kmem_cache *exts_cache;
+ struct slab *exts_slab;
+
+ exts_slab = virt_to_slab(vec);
+ if (exts_slab) {
+ /*
+ * The vector must be allocated from either normal or
+ * KMALLOC_NO_OBJ_EXT kmalloc caches to avoid cycles.
+ */
+ exts_cache = exts_slab->slab_cache;
+ WARN_ON_ONCE(!is_kmalloc_normal(exts_cache) &&
+ !(exts_cache->flags & SLAB_NO_OBJ_EXT));
+ }
+ }
new_exts = (unsigned long)vec;
#ifdef CONFIG_MEMCG
@@ -2217,7 +2198,6 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
* assign slabobj_exts in parallel. In this case the existing
* objcg vector should be reused.
*/
- mark_obj_codetag_empty(vec);
if (unlikely(!allow_spin))
kfree_nolock(vec);
else
@@ -2253,14 +2233,6 @@ static inline void free_slab_obj_exts(struct slab *slab, bool allow_spin)
return;
}
- /*
- * obj_exts was created with SLAB_ALLOC_NO_RECURSE flag, therefore its
- * corresponding extension will be NULL. alloc_tag_sub() will throw a
- * warning if slab has extensions but the extension of an object is
- * NULL, therefore replace NULL with CODETAG_EMPTY to indicate that
- * the extension for obj_exts is expected to be NULL.
- */
- mark_obj_codetag_empty(obj_exts);
if (allow_spin)
kfree(obj_exts);
else
@@ -5356,7 +5328,7 @@ void *__do_kmalloc_node(kmem_buckets *b, gfp_t flags, int node,
if (unlikely(!size))
return ZERO_SIZE_PTR;
- s = kmalloc_slab(size, b, flags, token);
+ s = kmalloc_slab(size, b, flags, token, ac->alloc_flags);
ret = slab_alloc_node(s, flags, node, ac);
ret = kasan_kmalloc(s, ret, size, flags);
@@ -5419,7 +5391,9 @@ static void *__kmalloc_nolock_noprof(DECL_TOKEN_PARAMS(size, token), gfp_t gfp_f
retry:
if (unlikely(size > KMALLOC_MAX_CACHE_SIZE))
return NULL;
- s = kmalloc_slab(size, NULL, gfp_flags, PASS_TOKEN_PARAM(token));
+
+ s = kmalloc_slab(size, NULL, gfp_flags, PASS_TOKEN_PARAM(token),
+ ac->alloc_flags);
if (!(s->flags & __CMPXCHG_DOUBLE) && !kmem_cache_debug(s))
/*
@@ -7979,10 +7953,10 @@ static int calculate_sizes(struct kmem_cache_args *args, struct kmem_cache *s)
s->allocflags |= __GFP_RECLAIMABLE;
/*
- * For KMALLOC_NORMAL caches we enable sheaves later by
- * bootstrap_kmalloc_sheaves() to avoid recursion
+ * For kmalloc caches we enable sheaves later by
+ * bootstrap_kmalloc_sheaves() to avoid recursion.
*/
- if (!is_kmalloc_normal(s))
+ if (!is_kmalloc_cache(s))
s->sheaf_capacity = calculate_sheaf_capacity(s, args);
/*
@@ -8548,7 +8522,7 @@ static void __init bootstrap_kmalloc_sheaves(void)
{
enum kmalloc_cache_type type;
- for (type = KMALLOC_NORMAL; type <= KMALLOC_PARTITION_END; type++) {
+ for (type = KMALLOC_NORMAL; type < NR_KMALLOC_TYPES; type++) {
for (int idx = 0; idx < KMALLOC_SHIFT_HIGH + 1; idx++) {
struct kmem_cache *s = kmalloc_caches[type][idx];
--
2.53.0
^ permalink raw reply related [flat|nested] 6+ messages in thread