rawhide slow like a snail because of kernel debugging?

[Christopher Brown]

On 12/02/2008, Michael Schwendt <mschwendt.tmp0701.nospam at arcor.de> wrote:
> On Tue, 12 Feb 2008 14:41:53 +0000, Christopher Brown wrote:
>
> > > It has begun some weeks ago in rawhide and is the same in F9 Alpha,
> > > which I installed from jigdo CD images.
> > >
> > > The entire system is slow whatever it does. Loadavg jumps up
> > > quickly. When running a simple yum update, loadavg goes above 6. User
> > > processes don't seem to get as much cpu power as would be possible.
> > > Windows take seconds to open. The GNOME Desktop is not as responsive
> > > as in F8 either. Opening dialogs, clicking buttons, there seems to be
> > > a penalty on everything. It's unbearable. Testing rawhide or F9 is no
> > > fun at all. Why is this? I remember that during Fedora Core test
> > > releases various kernel debugging features are enabled. Is this the
> > > reason also this time? Has it become much more cpu power hungry than
> > > e.g. with FC7 and older?
> >
> > >From the wiki:
> >
> > In Rawhide/devel kernels (and in -debug flavors of released kernels),
> > Fedora uses the SLUB allocator with full slab debugging enabled by
> > default. The debugging might cause problems in some rare cases: memory
> > allocations can fail, causing the system to panic. Slab debugging can
> > be disabled with the option slub_debug=-  (a single minus sign.) Note,
> > that this option will hide an actual bug that really should be
> > reported and fixed rather than worked around.
>
> Doesn't answer the original question, however.

I believe it does.

> Btw, the thread is longer and contains posts with evidence that X is
> the culprit.

No, you started a new thread whereas you should've added the info to
this one or indicated the new thread was a child of this one.

-- 
Christopher Brown

http://www.chruz.com