sky2 and hard drive performance

[John W. Linville]

On Sun, Dec 11, 2005 at 06:53:35PM -0800, Stephen Hemminger wrote:
> David Woodhouse wrote:
> 
> >On Sun, 2005-12-11 at 12:02 -0800, Nathan Grennan wrote:
> > 
> >
> >>  I do see that the driver can be loaded without a drop in performance,
> >>it is only activating the driver that triggers it. Another thing I see
> >>is that deactivating it doesn't fix the problem. In that I can go from
> >>run level 5 to run level 1, where networking is shut down in the
> >>process, but the performance in run level 1 will still be slow.
> >>
> >> Another potential clue maybe that I didn't see such a drop with raid0
> >>performance when I started using the sky2 driver. So I suspect it is
> >>just an interaction between the raid5 code and the sky2 code.
> >>   
> >>
> >
> >Just before leaving home last week I noticed that sky2 was causing an
> >interrupt storm on my new toy, which explained the massive performance
> >problems I saw there. Since I'd just taken the sky2.[ch] from the netdev
> >git tree and compiled them against the Fedora kernel I didn't report it;
> >just intended to look into it further when I got home.
> >
> > 
> >
> Doesn't anybody read the mailing lists... There was a missing interrupt
> clear that was fixed about 1 day later.

That patch didn't make it into FC4.netdev.4.  I'm spinning FC4.netdev.5
now, w/ just that patch added.

John
-- 
John W. Linville
linville at redhat.com