Subject: Re: kern/17929: mkdir takes > 40 s to complete on a 60 GB disk
To: David Laight <david@l8s.co.uk>
From: Luke Mewburn <lukem@NetBSD.org>
List: netbsd-bugs
Date: 08/11/2003 11:09:07
On Sun, Aug 10, 2003 at 10:58:47PM +0100, David Laight wrote:
| This has to be related to a smilar bug with raidframe.
|
| The disk geometry is reported as 119150 cylinders, 16 heads, 63 sectors.
| I suspect this means that the ufs filesystem has a very large number
| of cylinder groups.
|
| The directory placing algorithm doesn't work well under these circumstances!
|
| Recent changes to newfs (with the ufs2 support) mean that it ignores
| the physical geometry so these problems won't happen any more!
newfs was changed a While ago to use the minimal number of cylinder
groups that the geometry supports (rather than the default of `32').
If I recall correctly, that change was made after this PR was
submitted.
| Anyone know if the modified newfs is actually compatible with the old
| filessytem code?