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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2017-11-15 17:32:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-15 18:21:01 -0800 |
| commit | 4fd0b46e898791009b03b2fdd6510044fa8730a6 (patch) | |
| tree | ef78168cf70327d341eaf9fd07f25683dc869262 /kernel | |
| parent | d50112edde1d0c621520e53747044009f11c656b (diff) | |
| download | lwn-4fd0b46e898791009b03b2fdd6510044fa8730a6.tar.gz lwn-4fd0b46e898791009b03b2fdd6510044fa8730a6.zip | |
slab, slub, slob: convert slab_flags_t to 32-bit
struct kmem_cache::flags is "unsigned long" which is unnecessary on
64-bit as no flags are defined in the higher bits.
Switch the field to 32-bit and save some space on x86_64 until such
flags appear:
add/remove: 0/0 grow/shrink: 0/107 up/down: 0/-657 (-657)
function old new delta
sysfs_slab_add 720 719 -1
...
check_object 699 676 -23
[akpm@linux-foundation.org: fix printk warning]
Link: http://lkml.kernel.org/r/20171021100635.GA8287@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions