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From: Vivek Goyal <vgoyal@redhat.com>
To: "Américo Wang" <xiyou.wangcong@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	Vitaly Mayatskikh <v.mayatskih@gmail.com>,
	linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Randy Dunlap <rdunlap@xenotime.net>
Subject: Re: [PATCH 0/5] kdump: extract log buffer and registers from vmcore on NMI button pressing
Date: Fri, 4 Jun 2010 10:49:21 -0400	[thread overview]
Message-ID: <20100604144921.GG4111@redhat.com> (raw)
In-Reply-To: <20100604094936.GA5975@cr0.nay.redhat.com>

On Fri, Jun 04, 2010 at 05:49:36PM +0800, Américo Wang wrote:
> On Thu, Jun 03, 2010 at 05:13:47PM +0200, Andi Kleen wrote:
> >> > NMI would be only needed if the crash kernel is completely
> >> > hosed too.
> >> 
> >> That's the case.
> >
> >You're saying it booted but is hosed after boot?
> >
> >That seems like a very obscure case. Is that really common?
> >
> 
> Actually, I met two of this kind of cases recently.
> 
> One was stucked in early_idt_hander() during booting the second kernel,
> the other one is even worse, I even can't find where it hangs.

If you can't initialize the idt, will NMI work?

I think we need to fix those cases instead of creating another NMI
handler. To handle cases like network is not up or there is not sufficient
space on disk, a user space utility in kdump initrd should work.

Thanks
Vivek


  parent reply	other threads:[~2010-06-04 14:49 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-02  7:39 [PATCH 0/5] kdump: extract log buffer and registers from vmcore on NMI button pressing Vitaly Mayatskikh
2010-06-02  7:39 ` [PATCH 1/5] x86: Introduce ELF_CORE_EXTRACT_REGS Vitaly Mayatskikh
2010-06-02  7:39 ` [PATCH 2/5] x86: Split __show_regs() Vitaly Mayatskikh
2010-06-02  9:50   ` Pekka Enberg
2010-06-02 10:00     ` Vitaly Mayatskikh
2010-06-02  7:39 ` [PATCH 3/5] vmcore: Introduce dump_old_log() Vitaly Mayatskikh
2010-06-02  7:39 ` [PATCH 4/5] x86: Add new callback for unhandled NMIs Vitaly Mayatskikh
2010-06-02  7:39 ` [PATCH 5/5] Document unknown_nmi_dump_log variable Vitaly Mayatskikh
2010-06-02 15:16 ` [PATCH 0/5] kdump: extract log buffer and registers from vmcore on NMI button pressing Vivek Goyal
2010-06-03  9:01   ` Vitaly Mayatskikh
2010-06-03  9:30     ` Andi Kleen
2010-06-03 12:33       ` Vitaly Mayatskikh
2010-06-03 15:13         ` Andi Kleen
2010-06-04  9:32           ` Vitaly Mayatskikh
2010-06-04 10:15             ` Andi Kleen
2010-06-04 13:58               ` Vitaly Mayatskikh
2010-06-04  9:49           ` Américo Wang
2010-06-04 10:16             ` Andi Kleen
2010-06-04 14:49             ` Vivek Goyal [this message]
2010-06-04 14:42     ` Vivek Goyal

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