From: Eric Dumazet <edumazet@google.com>
Date: Wed, 4 Jun 2014 23:11:11 +0000 (-0700)
Subject: mm/zswap: NUMA aware allocation for zswap_dstmem
X-Git-Tag: v3.16-rc1~47^2~16^2~70
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=72d09633c9afa02bea317d65eb8b8a4ce7659a2a;p=platform%2Fkernel%2Flinux-exynos.git

mm/zswap: NUMA aware allocation for zswap_dstmem

zswap_dstmem is a percpu block of memory, which should be allocated using
kmalloc_node(), to get better NUMA locality.

Without it, all the blocks are allocated from a single node.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Seth Jennings <sjennings@variantweb.net>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/zswap.c b/mm/zswap.c
index aeaef0f..008388fe 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -347,7 +347,7 @@ static int __zswap_cpu_notifier(unsigned long action, unsigned long cpu)
 			return NOTIFY_BAD;
 		}
 		*per_cpu_ptr(zswap_comp_pcpu_tfms, cpu) = tfm;
-		dst = kmalloc(PAGE_SIZE * 2, GFP_KERNEL);
+		dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu));
 		if (!dst) {
 			pr_err("can't allocate compressor buffer\n");
 			crypto_free_comp(tfm);