Btrfs: update to the right index of defragment
When we use autodefrag, we forget to update the index which indicates the last page we've dirty. And we'll set dirty flags on a same set of pages again and again. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -1186,6 +1186,9 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
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if (newer_off == (u64)-1)
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break;
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if (ret > 0)
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i += ret;
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newer_off = max(newer_off + 1,
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(u64)i << PAGE_CACHE_SHIFT);
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