From 4db08d016ccedb5b97869724a096990acad59685 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Fri, 14 Jul 2017 11:45:21 -0700 Subject: [PATCH] f2fs: avoid cpu lockup Before retrying to flush data or dentry pages, we need to release cpu in order to prevent watchdog. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/checkpoint.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 56bbf592e487..5b876f6d3f6b 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -879,6 +879,7 @@ int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type) struct inode *inode; struct f2fs_inode_info *fi; bool is_dir = (type == DIR_INODE); + unsigned long ino = 0; trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir, get_pages(sbi, is_dir ? @@ -901,8 +902,17 @@ retry: inode = igrab(&fi->vfs_inode); spin_unlock(&sbi->inode_lock[type]); if (inode) { + unsigned long cur_ino = inode->i_ino; + filemap_fdatawrite(inode->i_mapping); iput(inode); + /* We need to give cpu to another writers. */ + if (ino == cur_ino) { + congestion_wait(BLK_RW_ASYNC, HZ/50); + cond_resched(); + } else { + ino = cur_ino; + } } else { /* * We should submit bio, since it exists several -- 2.20.1