linux-ext4 - [PATCH] ext4: group info caches set to SLAB_MEM

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Date:	Sun, 20 Nov 2011 07:48:44 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	tytso@....edu
Cc:	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	Namjae Jeon <linkinjeon@...il.com>,
	Amit Sahrawat <amit.sahrawat83@...il.com>
Subject: [PATCH] ext4: group info caches set to SLAB_MEM_SPREAD flags.

If group info caches set to SLAB_MEM_SPREAD flags, the allocation is spread evenly over all the memory nodes when using cpuset.
It is useful because group info caches are long lived.

Signed-off-by: Namjae Jeon <linkinjeon@...il.com>
Signed-off-by: Amit Sahrawat <amit.sahrawat83@...il.com>
---
 fs/ext4/mballoc.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e2d8be8..7aacbbe 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2407,7 +2407,8 @@ static int ext4_groupinfo_create_slab(size_t size)
 				bb_counters[blocksize_bits + 2]);
 
 	cachep = kmem_cache_create(ext4_groupinfo_slab_names[cache_index],
-					slab_size, 0, SLAB_RECLAIM_ACCOUNT,
+					slab_size, 0, SLAB_RECLAIM_ACCOUNT |
+					SLAB_MEM_SPREAD,
 					NULL);
 
 	ext4_groupinfo_caches[cache_index] = cachep;
-- 
1.7.4.4

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