From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f48.google.com (mail-pa0-f48.google.com [209.85.220.48]) by kanga.kvack.org (Postfix) with ESMTP id 2F2A0828DF for ; Wed, 30 Mar 2016 03:11:08 -0400 (EDT) Received: by mail-pa0-f48.google.com with SMTP id zm5so33432753pac.0 for ; Wed, 30 Mar 2016 00:11:08 -0700 (PDT) Received: from lgeamrelo12.lge.com (LGEAMRELO12.lge.com. [156.147.23.52]) by mx.google.com with ESMTP id v13si4338008pas.199.2016.03.30.00.10.42 for ; Wed, 30 Mar 2016 00:10:43 -0700 (PDT) From: Minchan Kim Subject: [PATCH v3 16/16] zram: use __GFP_MOVABLE for memory allocation Date: Wed, 30 Mar 2016 16:12:15 +0900 Message-Id: <1459321935-3655-17-git-send-email-minchan@kernel.org> In-Reply-To: <1459321935-3655-1-git-send-email-minchan@kernel.org> References: <1459321935-3655-1-git-send-email-minchan@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, jlayton@poochiereds.net, bfields@fieldses.org, Vlastimil Babka , Joonsoo Kim , koct9i@gmail.com, aquini@redhat.com, virtualization@lists.linux-foundation.org, Mel Gorman , Hugh Dickins , Sergey Senozhatsky , Rik van Riel , rknize@motorola.com, Gioh Kim , Sangseok Lee , Chan Gyun Jeong , Al Viro , YiPing Xu , Minchan Kim 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! Reviewed-by: Sergey Senozhatsky Signed-off-by: Minchan Kim --- drivers/block/zram/zram_drv.c | 3 ++- mm/zsmalloc.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 370c2f76016d..10f6ff1cf6a0 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -514,7 +514,8 @@ static struct zram_meta *zram_meta_alloc(char *pool_name, u64 disksize) goto out_error; } - meta->mem_pool = zs_create_pool(pool_name, GFP_NOIO | __GFP_HIGHMEM); + meta->mem_pool = zs_create_pool(pool_name, GFP_NOIO|__GFP_HIGHMEM + |__GFP_MOVABLE); if (!meta->mem_pool) { pr_err("Error creating memory pool\n"); goto out_error; diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index e24f4a160892..4b1ccb68f2ee 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -308,7 +308,7 @@ static void destroy_handle_cache(struct zs_pool *pool) static unsigned long alloc_handle(struct zs_pool *pool) { return (unsigned long)kmem_cache_alloc(pool->handle_cachep, - pool->flags & ~__GFP_HIGHMEM); + pool->flags & ~(__GFP_HIGHMEM|__GFP_MOVABLE)); } static void free_handle(struct zs_pool *pool, unsigned long handle) -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org