xfs
[Top] [All Lists]

TAKE 947118 - Initial pass at going directly-to-bio on the buffered IO p

To: linux-xfs@xxxxxxxxxxx, sgi.bugs.xfs@xxxxxxxxxxxxxxxxx
Subject: TAKE 947118 - Initial pass at going directly-to-bio on the buffered IO path.
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Fri, 16 Dec 2005 05:48:35 -0600
Sender: linux-xfs-bounce@xxxxxxxxxxx
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


<Prev in Thread] Current Thread [Next in Thread>
  • TAKE 947118 - Initial pass at going directly-to-bio on the buffered IO path., Christoph Hellwig <=