From: "Jan Beulich" <jbeulich@novell.com>
To: "Andi Kleen" <ak@suse.de>
Cc: "Chuck Ebbert" <76306.1226@compuserve.com>,
"Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>,
"Andrew Morton" <akpm@osdl.org>, "Dave Jones" <davej@redhat.com>,
"linux-kernel" <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.18-rc3-g3b445eea BUG: warning at /usr/src/linux-git/kernel/cpu.c:51
Date: Tue, 08 Aug 2006 08:00:24 +0100 [thread overview]
Message-ID: <44D852A8.76E4.0078.0@novell.com> (raw)
In-Reply-To: <200608080849.38012.ak@suse.de>
>>> Andi Kleen <ak@suse.de> 08.08.06 08:49 >>>
>
>> >include/asm-i386/unwind.h::arch_unw_user_mode():
>> > return info->regs.eip < PAGE_OFFSET
>> > || (info->regs.eip >= __fix_to_virt(FIX_VDSO)
>> > && info->regs.eip < __fix_to_virt(FIX_VDSO) + PAGE_SIZE)
>> > || info->regs.esp < PAGE_OFFSET;
>>
>> Hmm, indeed. Then I'm unclear what the problem might be here.
>
>That code will check for the vsyscall page, but sysenter_entry isn't
>in the vsyscall page, but in the kernel proper.
>
>So it means the EIP never actually reached the vsyscall page. It should
>have gone up another level, but didn't.
I think we had seen sysenter_past_esp in the stack trace, so it did reach
that function. The next outer level should be the VDSO page, shouldn't it?
Jan
next prev parent reply other threads:[~2006-08-08 6:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-08 0:39 Chuck Ebbert
2006-08-08 6:36 ` Jan Beulich
2006-08-08 6:49 ` Andi Kleen
2006-08-08 7:00 ` Jan Beulich [this message]
2006-08-17 20:03 Chuck Ebbert
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