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For now on every 10 cyclinder groups flush the buffer cache to free

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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
This commit is contained in:
Doug Ambrisko 2008-11-13 17:40:21 +00:00
parent 0a15841568
commit f1c1cdbb9c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=184934
1 changed files with 4 additions and 0 deletions
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4
sys/ufs/ffs/ffs_snapshot.c
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@ -351,6 +351,8 @@ ffs_snapshot(mp, snapfile)
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 @@ ffs_snapshot(mp, snapfile)
goto out;
error = cgaccount(cg, vp, nbp, 1);
bawrite(nbp);
if (cg % 10 == 0)
ffs_syncvnode(vp, MNT_WAIT);
if (error)
goto out;
}