diff options
| author | Minchan Kim <minchan@kernel.org> | 2016-07-26 15:23:34 -0700 |
|---|---|---|
| committer | Vinayak Menon <vinmenon@codeaurora.org> | 2017-02-21 12:41:49 +0530 |
| commit | a3f75513c902a0aeea04d61f9c14dfa28ab446cf (patch) | |
| tree | a04a49249dfcd971b8140fb6eed23f677552c15e | |
| parent | 55ebcd4f03a36ba60908d6505fa646997822f4d5 (diff) | |
zram: use __GFP_MOVABLE for memory allocation
Zsmalloc is ready for page migration so zram can use __GFP_MOVABLE from
now on.
I did test to see how it helps to make higher order pages. Test
scenario is as follows.
KVM guest, 1G memory, ext4 formated zram block device,
for i in `seq 1 8`;
do
dd if=/dev/vda1 of=mnt/test$i.txt bs=128M count=1 &
done
wait `pidof dd`
for i in `seq 1 2 8`;
do
rm -rf mnt/test$i.txt
done
fstrim -v mnt
echo "init"
cat /proc/buddyinfo
echo "compaction"
echo 1 > /proc/sys/vm/compact_memory
cat /proc/buddyinfo
old:
init
Node 0, zone DMA 208 120 51 41 11 0 0 0 0 0 0
Node 0, zone DMA32 16380 13777 9184 3805 789 54 3 0 0 0 0
compaction
Node 0, zone DMA 132 82 40 39 16 2 1 0 0 0 0
Node 0, zone DMA32 5219 5526 4969 3455 1831 677 139 15 0 0 0
new:
init
Node 0, zone DMA 379 115 97 19 2 0 0 0 0 0 0
Node 0, zone DMA32 18891 16774 10862 3947 637 21 0 0 0 0 0
compaction
Node 0, zone DMA 214 66 87 29 10 3 0 0 0 0 0
Node 0, zone DMA32 1612 3139 3154 2469 1745 990 384 94 7 0 0
As you can see, compaction made so many high-order pages. Yay!
Link: http://lkml.kernel.org/r/1464736881-24886-13-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 9bc482d3460501ac809457af26b46b72cd7dc212
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I5804aff097df5b5ee6a54a52642bc41accb625af
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 5ddc80e01f5e..3c59417b485a 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -725,7 +725,8 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, src = uncmem; } - handle = zs_malloc(meta->mem_pool, clen, GFP_NOIO | __GFP_HIGHMEM); + handle = zs_malloc(meta->mem_pool, clen, GFP_NOIO | __GFP_HIGHMEM | + __GFP_MOVABLE); if (!handle) { if (printk_timed_ratelimit(&zram_rs_time, ALLOC_ERROR_LOG_RATE_MS)) |