+ zram-use-__gfp_movable-for-memory-allocation.patch added to -mm tree

* + zram-use-__gfp_movable-for-memory-allocation.patch added to -mm tree
@ 2016-06-01 21:41 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2016-06-01 21:41 UTC (permalink / raw)
  To: minchan, sergey.senozhatsky, vbabka, mm-commits


The patch titled
     Subject: zram: use __GFP_MOVABLE for memory allocation
has been added to the -mm tree.  Its filename is
     zram-use-__gfp_movable-for-memory-allocation.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/zram-use-__gfp_movable-for-memory-allocation.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/zram-use-__gfp_movable-for-memory-allocation.patch

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------------------------------------------------------
From: Minchan Kim <minchan@kernel.org>
Subject: 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  1
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>
---

 drivers/block/zram/zram_drv.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff -puN drivers/block/zram/zram_drv.c~zram-use-__gfp_movable-for-memory-allocation drivers/block/zram/zram_drv.c

--- a/drivers/block/zram/zram_drv.c~zram-use-__gfp_movable-for-memory-allocation
+++ a/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;
 
_

Patches currently in -mm which might be from minchan@kernel.org are

mm-use-put_page-to-free-page-instead-of-putback_lru_page.patch
mm-migrate-support-non-lru-movable-page-migration.patch
mm-balloon-use-general-non-lru-movable-page-feature.patch
zsmalloc-keep-max_object-in-size_class.patch
zsmalloc-use-bit_spin_lock.patch
zsmalloc-use-accessor.patch
zsmalloc-factor-page-chain-functionality-out.patch
zsmalloc-introduce-zspage-structure.patch
zsmalloc-separate-free_zspage-from-putback_zspage.patch
zsmalloc-use-freeobj-for-index.patch
zsmalloc-page-migration-support.patch
zram-use-__gfp_movable-for-memory-allocation.patch


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