From 2743f865543c0c4a5e12fc13edb2bf89a6e9687c Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Sat, 28 Jun 2014 01:00:41 +0900 Subject: [PATCH] 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 Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 9dfb9a0..4b697cc 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); } -- 2.7.4