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btrfs: use GFP_NOFS instead of GFP_KERNEL 

In the filesystem context, we must allocate memory by GFP_NOFS,
or we may start another filesystem operation and make kswap thread hang up.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Miao Xie 2011-03-24 11:41:21 +00:00 committed by root
parent 97d9a8a420
commit fc0e4a314e
1 changed files with 2 additions and 2 deletions
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4
fs/btrfs/extent-tree.c
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@ -471,7 +471,7 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
if (load_cache_only)
return 0;
caching_ctl = kzalloc(sizeof(*caching_ctl), GFP_KERNEL);
caching_ctl = kzalloc(sizeof(*caching_ctl), GFP_NOFS);
BUG_ON(!caching_ctl);
INIT_LIST_HEAD(&caching_ctl->list);
@ -1743,7 +1743,7 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans,
static void btrfs_issue_discard(struct block_device *bdev,
u64 start, u64 len)
{
blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL, 0);
blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_NOFS, 0);
}
static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,