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Btrfs: [PATCH] extent_map: add writepage_end_io hook

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XFS updates the ondisk inode size only after the data I/O has finished,
so it needs a hook when the writepage end_bio handler has finished.

Might not be worth applying as-is as the per-page callback is very
ineffcient.  What XFS really wants is a callback when writeout of a
whole extent has completed.  This delayed i_size updates scheme might
be worthwile for btrfs aswell, btw.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Christoph Hellwig 2007-09-10 20:02:33 -04:00 • committed by David Woodhouse
parent b06355f0fe
commit 0e2752a72c
2 changed files with 3 additions and 0 deletions
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fs/btrfs/extent_map.h
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@ -11,6 +11,7 @@ struct extent_map_ops {
int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end);
void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end);
};
struct extent_map_tree {