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?