Commit 4db08d01 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: avoid cpu lockup 



Before retrying to flush data or dentry pages, we need to release cpu in order
to prevent watchdog.

Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 299aa41a

fs/f2fs/checkpoint.c

+10 −0
Original line number Diff line number Diff line
@@ -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 @@ int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type) 
	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