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;
}
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