[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <200706042012.15915.ak@suse.de>
Date: Mon, 4 Jun 2007 20:12:15 +0200
From: Andi Kleen <ak@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Matt Mackall <mpm@...enic.com>,
Rusty Russell <rusty@...tcorp.com.au>,
linux-kernel@...r.kernel.org
Subject: Re: lguest rebroken in 2.6.22-rc3-mm1
> >
> > Looks like this one got lost in rc3-mm1.
>
> Andi said that he fixed the zero-divide by other means?
I determined it cannot happen in my source tree. When notsc
is passed TSC CPUID is cleared and sched-clock works.
I suspect what happens is that lguest forgets to clear the TSC cpuid
bit when it disables TSC. Then the TSC frequency doesn't get computed
and sched-clock can divide by zero.That's purely a lguest bug that needs
to be fixed in lguest with a
clear_bit(X86_FEATURE_TSC, &boot_cpu_data.x86_capability)
somewhere
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists