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.
Date: Fri Dec 16 03:48:23 PST 2005
Workarea: naboo.americas.sgi.com:/home/daisy40/hch/ptools/xfs-2.6.x
Inspected by: dgc, nathans
The following file(s) were checked into:
bonnie.engr.sgi.com:/isms/linux/2.6.x-xfs
Modid: xfs-linux:xfs-kern:203822a
fs/xfs/linux-2.6/xfs_linux.h - 1.136 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_linux.h.diff?r1=text&tr1=1.136&r2=text&tr2=1.135&f=h
fs/xfs/linux-2.6/xfs_iops.h - 1.26 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_iops.h.diff?r1=text&tr1=1.26&r2=text&tr2=1.25&f=h
fs/xfs/linux-2.6/xfs_aops.c - 1.102 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_aops.c.diff?r1=text&tr1=1.102&r2=text&tr2=1.101&f=h
fs/xfs/linux-2.6/xfs_aops.h - 1.4 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_aops.h.diff?r1=text&tr1=1.4&r2=text&tr2=1.3&f=h
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