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Chris Mason 1643298592 Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush) ... This adds basic O_DIRECT read and write support. In the write case, we just do a normal buffered write followed by a cache flush. O_DIRECT + O_SYNC are required to trigger metadata syncs. In the read case, there is a basic btrfs_get_block call for use by the generic O_DIRECT code. This does honor multi-volume mapping rules but it skips all checksumming. Signed-off-by: Chris Mason <chris.mason@oracle.com>		17 years ago
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btrfs	Btrfs: Add O_DIRECT read and write (writes == buffered + cache flush)	17 years ago