[XFS] Initial pass at going directly-to-bio on the buffered IO path. This

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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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Christoph Hellwig 2006-01-11 15:40:13 +11:00 • committed by Nathan Scott

parent ce8e922c0e

commit f6d6d4fcd1

4 changed files with 431 additions and 364 deletions

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776

fs/xfs/linux-2.6/xfs_aops.c

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fs/xfs/linux-2.6/xfs_aops.h

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fs/xfs/linux-2.6/xfs_iops.h

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fs/xfs/linux-2.6/xfs_linux.h

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