svn commit: r184934 - head/sys/ufs/ffs

[Doug Ambrisko]

Kostik Belousov writes:
| On Thu, Nov 13, 2008 at 05:40:21PM +0000, Doug Ambrisko wrote:
| > Author: ambrisko
| > Date: Thu Nov 13 17:40:21 2008
| > New Revision: 184934
| > URL: http://svn.freebsd.org/changeset/base/184934
| > 
| > Log:
| >   For now on every 10 cyclinder groups flush the buffer cache to free
| >   up space.  If the buffer cache fills up then the disk systems can
| >   grind to a halt.  Better tuning can be figured out later.
| >   
| >   Tested by:	Tim, others and work
| >   Reviewed by:	Kostik Belousov
| >   PR:		128832
| > 
| > Modified:
| >   head/sys/ufs/ffs/ffs_snapshot.c
| > 
| > Modified: head/sys/ufs/ffs/ffs_snapshot.c
| > ==============================================================================
| > --- head/sys/ufs/ffs/ffs_snapshot.c	Thu Nov 13 17:13:16 2008	(r184933)
| > +++ head/sys/ufs/ffs/ffs_snapshot.c	Thu Nov 13 17:40:21 2008	(r184934)
| > @@ -351,6 +351,8 @@ restart:
| >  		if (error)
| >  			goto out;
| >  		bawrite(nbp);
| > +		if (cg % 10 == 0)
| > +			ffs_syncvnode(vp, MNT_WAIT);
| >  	}
| >  	/*
| >  	 * Copy all the cylinder group maps. Although the
| > @@ -372,6 +374,8 @@ restart:
| >  			goto out;
| >  		error = cgaccount(cg, vp, nbp, 1);
| >  		bawrite(nbp);
| > +		if (cg % 10 == 0)
| > +			ffs_syncvnode(vp, MNT_WAIT);
| >  		if (error)
| >  			goto out;
| >  	}
| Thank you !
| 
| Please, MFC it for 7.1.

I'll wait for some of the dust to settle first.

Also I want to test a 7.1 machine here without any of my patches, then
start adding some back it.  I should be able to get that mostly done
today unless I get hit with other work stuff.  From my perspective 
I have a couple of low risk patches that should go in but look more 
radical.

Doug A.