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authorJaegeuk Kim <jaegeuk@kernel.org>2014-06-28 01:00:41 +0900
committerJaegeuk Kim <jaegeuk@kernel.org>2014-07-09 05:59:45 -0700
commit2743f865543c0c4a5e12fc13edb2bf89a6e9687c (patch)
tree12189a35530e47904d52743ab5fb001a174c45b3
parentb2c0829912493df596706a1a036c67beb1bd6ff5 (diff)
downloadlinux-2743f865543c0c4a5e12fc13edb2bf89a6e9687c.tar.gz
f2fs: check bdi->dirty_exceeded when trying to skip data writes
If we don't check the current backing device status, balance_dirty_pages can fall into infinite pausing routine. This can be occurred when a lot of directories make a small number of dirty dentry pages including files. Reported-by: Brian Chadwick <brianchad@westnet.com.au> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
-rw-r--r--fs/f2fs/node.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 9dfb9a042fd..4b697ccc9b0 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -42,6 +42,8 @@ bool available_free_memory(struct f2fs_sb_info *sbi, int type)
mem_size = (nm_i->nat_cnt * sizeof(struct nat_entry)) >> 12;
res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 2);
} else if (type == DIRTY_DENTS) {
+ if (sbi->sb->s_bdi->dirty_exceeded)
+ return false;
mem_size = get_pages(sbi, F2FS_DIRTY_DENTS);
res = mem_size < ((val.totalram * nm_i->ram_thresh / 100) >> 1);
}