TAKE 917976 - combat NULL files...

[nathans@xxxxxxx (Nathan Scott)]

Start writeout earlier (on last close) in the case where we have a
truncate down followed by delayed allocation (buffered writes) - worst
case scenario for the notorious NULL files problem.  This reduces the
window where we are exposed to that problem significantly.

Date:  Tue May 30 17:17:34 AEST 2006
Workarea:  chook.melbourne.sgi.com:/build/nathans/xfs-linux
Inspected by:  dgc

The following file(s) were checked into:
  longdrop.melbourne.sgi.com:/isms/xfs-kern/xfs-linux-melb


Modid:  xfs-linux-melb:xfs-kern:26100a
xfs_vnodeops.c - 1.676 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/xfs_vnodeops.c.diff?r1=text&tr1=1.676&r2=text&tr2=1.675&f=h
linux-2.6/xfs_file.c - 1.138 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_file.c.diff?r1=text&tr1=1.138&r2=text&tr2=1.137&f=h
linux-2.6/xfs_vnode.h - 1.120 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_vnode.h.diff?r1=text&tr1=1.120&r2=text&tr2=1.119&f=h
linux-2.6/xfs_fs_subr.c - 1.46 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_fs_subr.c.diff?r1=text&tr1=1.46&r2=text&tr2=1.45&f=h
linux-2.6/xfs_aops.c - 1.129 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.6/xfs_aops.c.diff?r1=text&tr1=1.129&r2=text&tr2=1.128&f=h
linux-2.4/xfs_file.c - 1.125 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.4/xfs_file.c.diff?r1=text&tr1=1.125&r2=text&tr2=1.124&f=h
linux-2.4/xfs_vnode.h - 1.109 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.4/xfs_vnode.h.diff?r1=text&tr1=1.109&r2=text&tr2=1.108&f=h
linux-2.4/xfs_fs_subr.c - 1.47 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.4/xfs_fs_subr.c.diff?r1=text&tr1=1.47&r2=text&tr2=1.46&f=h
linux-2.4/xfs_aops.c - 1.102 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/linux-2.4/xfs_aops.c.diff?r1=text&tr1=1.102&r2=text&tr2=1.101&f=h
dmapi/xfs_dm.c - 1.9 - changed
http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-linux/dmapi/xfs_dm.c.diff?r1=text&tr1=1.9&r2=text&tr2=1.8&f=h