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authorChristoph Hellwig <hch@sgi.com>2006-01-11 15:40:13 +1100
committerNathan Scott <nathans@sgi.com>2006-01-11 15:40:13 +1100
commitf6d6d4fcd180f8e47bf6b13fc6cce1e6c156d0ea (patch)
tree2d4e981bb61f564904f7b7ca1ab69d163c0f69dd /mm
parentce8e922c0e79c8093452ba9a124981332b75706b (diff)
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[XFS] Initial pass at going directly-to-bio on the buffered IO path. This
allows us to submit much larger I/Os instead of sending down lots of small buffer_heads. To do this we need to have a rather complicated I/O submission and completion tracking infrastructure. Part of the latter has been merged already a long time ago for direct I/O support. Part of the problem is that we need to track sub-pagesize regions and for that we still need buffer_heads for the time beeing. Long-term I hope we can move to better data strucutures and/or maybe move this to fs/mpage.c instead of having it in XFS. Original patch from Nathan Scott with various updates from David Chinner and Christoph Hellwig. SGI-PV: 947118 SGI-Modid: xfs-linux-melb:xfs-kern:203822a Signed-off-by: Christoph Hellwig <hch@sgi.com> Signed-off-by: Nathan Scott <nathans@sgi.com>
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