diff options
| author | Minchan Kim <minchan@kernel.org> | 2016-07-26 15:23:34 -0700 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2018-10-04 14:16:10 +0530 |
| commit | 1cf7e4f3e9def846467a5c1deee42aa58a5382aa (patch) | |
| tree | 3575fbf227dbc0fb9f2acec376381aee133c2813 | |
| parent | ac99063cdf6c9fae5aa7699150381f443bde84fc (diff) | |
| download | linaro-android-1cf7e4f3e9def846467a5c1deee42aa58a5382aa.tar.gz | |
UPSTREAM: 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>
(cherry picked from commit 9bc482d3460501ac809457af26b46b72cd7dc212)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I5d7f6eaa4c2d8d3f4da30fc2bd21f4db1be95e50
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index be2ee475be5c..38a6181be4b4 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -738,7 +738,8 @@ compress_again: handle = zs_malloc(meta->mem_pool, clen, __GFP_KSWAPD_RECLAIM | __GFP_NOWARN | - __GFP_HIGHMEM); + __GFP_HIGHMEM | + __GFP_MOVABLE); if (!handle) { zcomp_stream_put(zram->comp); zstrm = NULL; @@ -746,7 +747,8 @@ compress_again: atomic64_inc(&zram->stats.writestall); handle = zs_malloc(meta->mem_pool, clen, - GFP_NOIO | __GFP_HIGHMEM); + GFP_NOIO | __GFP_HIGHMEM | + __GFP_MOVABLE); if (handle) goto compress_again; |