From: Chuck Ebbert <cebbert@redhat.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: i386 doublefault handler is broken with CONFIG_DEBUG_SPINLOCK
Date: Thu, 09 Aug 2007 19:35:39 -0400 [thread overview]
Message-ID: <46BBA4CB.7070009@redhat.com> (raw)
In-Reply-To: <20070809231618.GC1845@one.firstfloor.org>
On 08/09/2007 07:16 PM, Andi Kleen wrote:
>
> 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.
Looks like it just fails the ptr_ok() test:
#define ptr_ok(x) ((x) > PAGE_OFFSET && (x) < PAGE_OFFSET + 0x1000000)
page_offset c0000000
+ 1000000
< c1404000
What should that be changed to, or is there some easier way to test that?
next prev parent reply other threads:[~2007-08-09 23:35 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
2007-08-09 23:35 ` Chuck Ebbert [this message]
2007-08-10 8:23 ` Andi Kleen
2007-08-10 19:11 ` Chuck Ebbert
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