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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 <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -879,6 +879,7 @@ int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
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struct inode *inode;
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struct f2fs_inode_info *fi;
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bool is_dir = (type == DIR_INODE);
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unsigned long ino = 0;
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trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
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get_pages(sbi, is_dir ?
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@ -901,8 +902,17 @@ retry:
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inode = igrab(&fi->vfs_inode);
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spin_unlock(&sbi->inode_lock[type]);
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if (inode) {
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unsigned long cur_ino = inode->i_ino;
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filemap_fdatawrite(inode->i_mapping);
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iput(inode);
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/* We need to give cpu to another writers. */
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if (ino == cur_ino) {
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congestion_wait(BLK_RW_ASYNC, HZ/50);
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cond_resched();
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} else {
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ino = cur_ino;
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}
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} else {
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/*
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* We should submit bio, since it exists several
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