Messages in this thread Patch in this message |  | | From | Wei Yang <> | Subject | [PATCH 1/3] mm/slub: pack red_left_pad with another int to save a word | Date | Sun, 30 Apr 2017 19:31:50 +0800 |
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On 64bit arch, struct is 8-bytes aligned, so int will occupy a word if it doesn't sits well.
This patch pack red_left_pad with reserved to save 8 bytes for struct kmem_cache on a 64bit arch.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com> --- include/linux/slub_def.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index 07ef550c6627..ec13aab32647 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -79,9 +79,9 @@ struct kmem_cache { int inuse; /* Offset to metadata */ int align; /* Alignment */ int reserved; /* Reserved bytes at the end of slabs */ + int red_left_pad; /* Left redzone padding size */ const char *name; /* Name (only for display!) */ struct list_head list; /* List of slab caches */ - int red_left_pad; /* Left redzone padding size */ #ifdef CONFIG_SYSFS struct kobject kobj; /* For sysfs */ #endif -- 2.11.0
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