linux-kernel - [PATCH] gfs2: use __vmalloc GFP_NOFS for fs-related allocations.

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Date:	Sun,  1 Feb 2015 22:59:54 -0500
From:	green@...uxhacker.ru
To:	Steven Whitehouse <swhiteho@...hat.com>
Cc:	cluster-devel@...hat.com, linux-kernel@...r.kernel.org,
	Oleg Drokin <green@...uxhacker.ru>
Subject: [PATCH] gfs2: use __vmalloc GFP_NOFS for fs-related allocations.

From: Oleg Drokin <green@...uxhacker.ru>

leaf_dealloc uses vzalloc as a fallback to kzalloc(GFP_NOFS), so
it clearly does not want any shrinker activity within the fs itself.
convert vzalloc into __vmalloc(GFP_NOFS|__GFP_ZERO) to better achieve
this goal.

Signed-off-by: Oleg Drokin <green@...uxhacker.ru>
---
 fs/gfs2/dir.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index c5a34f0..6371192 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1896,7 +1896,8 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
 
 	ht = kzalloc(size, GFP_NOFS | __GFP_NOWARN);
 	if (ht == NULL)
-		ht = vzalloc(size);
+		ht = __vmalloc(size, GFP_NOFS | __GFP_NOWARN | __GFP_ZERO,
+			       PAGE_KERNEL);
 	if (!ht)
 		return -ENOMEM;
 
-- 
2.1.0

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