From: Andi Kleen <andi@firstfloor.org>
To: Chuck Ebbert <cebbert@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: i386 doublefault handler is broken with CONFIG_DEBUG_SPINLOCK
Date: Fri, 10 Aug 2007 01:16:18 +0200 [thread overview]
Message-ID: <20070809231618.GC1845@one.firstfloor.org> (raw)
In-Reply-To: <46BB5F9B.6050808@redhat.com>
On Thu, Aug 09, 2007 at 02:40:27PM -0400, Chuck Ebbert wrote:
> On 08/09/2007 01:49 PM, Andi Kleen wrote:
> > Chuck Ebbert <cebbert@redhat.com> writes:
> >> Initializing FS in the doublefault_tss should fix it.
> >>
> >> Signed-off-by: Chuck Ebbert <cebbert@redhat.com>
> >>
> >> ---
> >>
> >> NOTE: not even compile tested.
> >
> > Can you please test it?
> >
>
> It compiles but I can't really test it further right now.
I tested it. Even on a box without spin lock debugging I get a hard
hang after
double fault, gdt at c1404000 [255 bytes]
even though it should have printed the registers.
So it looks like there is more broken in the DF handler than just
this.
-Andi
next prev parent reply other threads:[~2007-08-09 23:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-09 16:49 i386 doublefault handler is broken with CONFIG_DEBUG_SPINLOCK Chuck Ebbert
2007-08-09 17:49 ` Andi Kleen
2007-08-09 18:40 ` Chuck Ebbert
2007-08-09 19:00 ` Jeremy Fitzhardinge
2007-08-09 23:16 ` Andi Kleen [this message]
2007-08-09 23:35 ` Chuck Ebbert
2007-08-10 8:23 ` Andi Kleen
2007-08-10 19:11 ` Chuck Ebbert
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