[Cluster-devel] Re: Why the gfs2 performance regressed?

[Denis Cheng]

On Jan 3, 2008 12:52 AM, Steven Whitehouse <swhiteho at redhat.com> wrote:
> There was a performance regression with the -nmw tree relating to a set
> of patches which I removed from the tree this morning. That would make
> it slower, but not by the amount that you are seeing, and also it would
> affect only "normal" I/O and not fcntl locks.
>
> Is there a point in the history of the  -nmw git tree which you know is
> ok? Perhaps it would be possible to bisect the tree to find the problem
> patch?
I've pulled from gfs2-2.6-nmw.git on this morning, (Thu Jan  3
03:12:29 UTC 2008), and what you said should be synced here,
but it didn't solve the problem, even more serious, some warning
kernel OOPS messages will appear on umount.gfs2,

I compiled an older kernel release and 2.6.21.7 has been tested to be
good, samba writing tests report 70 MB/s again.

I'm now testing a newer kernel release.

>
> Steve.

-- 
Denis Cheng