The patch titled
Subject: include/linux/slab.h: add kmalloc_array_node() and kcalloc_node()
has been added to the -mm tree. Its filename is
mm-add-kmalloc_array_node-and-kcalloc_node.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-add-kmalloc_array_node-and-kcalloc_node.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-add-kmalloc_array_node-and-kcalloc_node.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Johannes Thumshirn <jthumshirn@xxxxxxx>
Subject: include/linux/slab.h: add kmalloc_array_node() and kcalloc_node()
Patch series "Add kmalloc_array_node() and kcalloc_node()".
Our current memeory allocation routines suffer form an API imbalance,
for one we have kmalloc_array() and kcalloc() which check for
overflows in size multiplication and we have kmalloc_node() and
kzalloc_node() which allow for memory allocation on a certain NUMA
node but don't check for eventual overflows.
This patch (of 6):
We have kmalloc_array() and kcalloc() wrappers on top of kmalloc() which
ensure us overflow free multiplication for the size of a memory allocation
but these implementations are not NUMA-aware.
Likewise we have kmalloc_node() which is a NUMA-aware version of kmalloc()
but the implementation is not aware of any possible overflows in eventual
size calculations.
Introduce a combination of the two above cases to have a NUMA-node aware
version of kmalloc_array() and kcalloc().
Link: http://lkml.kernel.org/r/20170927082038.3782-2-jthumshirn@xxxxxxx
Signed-off-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Damien Le Moal <damien.lemoal@xxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Doug Ledford <dledford@xxxxxxxxxx>
Cc: Hal Rosenstock <hal.rosenstock@xxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Mike Marciniszyn <infinipath@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx>
Cc: Sean Hefty <sean.hefty@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/slab.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff -puN include/linux/slab.h~mm-add-kmalloc_array_node-and-kcalloc_node include/linux/slab.h
--- a/include/linux/slab.h~mm-add-kmalloc_array_node-and-kcalloc_node
+++ a/include/linux/slab.h
@@ -635,6 +635,22 @@ extern void *__kmalloc_track_caller(size
#define kmalloc_track_caller(size, flags) \
__kmalloc_track_caller(size, flags, _RET_IP_)
+static inline void *kmalloc_array_node(size_t n, size_t size, gfp_t flags,
+ int node)
+{
+ if (size != 0 && n > SIZE_MAX / size)
+ return NULL;
+ if (__builtin_constant_p(n) && __builtin_constant_p(size))
+ return kmalloc_node(n * size, flags, node);
+ return __kmalloc_node(n * size, flags, node);
+}
+
+static inline void *kcalloc_node(size_t n, size_t size, gfp_t flags, int node)
+{
+ return kmalloc_array_node(n, size, flags | __GFP_ZERO, node);
+}
+
+
#ifdef CONFIG_NUMA
extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, unsigned long);
#define kmalloc_node_track_caller(size, flags, node) \
_
Patches currently in -mm which might be from jthumshirn@xxxxxxx are
mm-add-kmalloc_array_node-and-kcalloc_node.patch
block-use-kmalloc_array_node.patch
ib-qib-use-kmalloc_array_node.patch
ib-rdmavt-use-kmalloc_array_node.patch
mm-mempool-use-kmalloc_array_node.patch
rds-ib-use-kmalloc_array_node.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
