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 <mi...@cn.fujitsu.com> --- fs/btrfs/extent-tree.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f1db57d..42061d2 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -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, + blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_NOFS, BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER); } -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html