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From: Vivek Goyal <vgoyal@redhat.com>
To: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: oomichi@mxs.nes.nec.co.jp, "Luck, Tony" <tony.luck@intel.com>,
	kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	tachibana@mxm.nes.nec.co.jp, Andi Kleen <andi@firstfloor.org>,
	Borislav Petkov <bp@alien8.de>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	anderson@redhat.com, crash-utility@redhat.com
Subject: Re: [Patch 1/4][kernel][slimdump] Add new elf-note of type NT_NOCOREDUMP to capture slimdump
Date: Wed, 5 Oct 2011 11:52:17 -0400	[thread overview]
Message-ID: <20111005155217.GE30146@redhat.com> (raw)
In-Reply-To: <20111005094727.GB7485@in.ibm.com>

On Wed, Oct 05, 2011 at 03:17:27PM +0530, K.Prasad wrote:

[..]
> Fine with me. I see that the various IA32_MCi_Status registers will hold
> information about the error and use that to classify MCEs.
> 
> I think the best way to go about is to retain NT_NOCOREDUMP for non-DRAM
> errors also, but use the note-name field in the elf-note and distinguish the
> various types of errors...say, by using names such as "PANIC_MCE_DRAM",
> "PANIC_MCE_CACHE", etc (similar to the error codes described in the Intel
> manual). The upstream tools like 'makedumpfile' and 'crash' will have to
> be taught to parse the elf-note name and act accordingly.

I am assuming that basic MCE error messages are available in kernel log. 
Why can't user space simply scan the logs for MCE error and just save
the log buffers in case of MCE. That way a user gets the MCE information
while not trying to save the whole dump. And no need of an extra ELF note.

Thanks
Vivek

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  parent reply	other threads:[~2011-10-05 15:53 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-03  7:07 [Patch 0/4] Slimdump framework using NT_NOCOREDUMP elf-note K.Prasad
2011-10-03  7:32 ` [Patch 1/4][kernel][slimdump] Add new elf-note of type NT_NOCOREDUMP to capture slimdump K.Prasad
2011-10-03 10:10   ` Eric W. Biederman
2011-10-03 12:03     ` K.Prasad
2011-10-04  6:34       ` Borislav Petkov
2011-10-05  7:07         ` K.Prasad
2011-10-05  7:31           ` Borislav Petkov
2011-10-05  9:47             ` K.Prasad
2011-10-05 12:41               ` Borislav Petkov
2011-10-05 15:52               ` Vivek Goyal [this message]
     [not found]                 ` <10327.1317830438@turing-police.cc.vt.edu>
2011-10-05 16:16                   ` Borislav Petkov
2011-10-05 17:20                     ` Vivek Goyal
2011-10-05 17:13                   ` Vivek Goyal
     [not found]             ` <26571.1317815746@turing-police.cc.vt.edu>
2011-10-05 12:31               ` Borislav Petkov
2011-10-05 15:19           ` Vivek Goyal
2011-10-05 15:30           ` Vivek Goyal
2011-10-03 22:53     ` Luck, Tony
2011-10-04 14:04   ` Vivek Goyal
2011-10-05  7:18     ` K.Prasad
2011-10-05  7:33       ` Borislav Petkov
2011-10-05  9:23         ` K.Prasad
2011-10-05 15:25       ` Vivek Goyal
2011-10-07 16:12         ` K.Prasad
2011-10-10  7:07           ` Borislav Petkov
2011-10-11 18:44             ` K.Prasad
2011-10-11 18:59               ` Luck, Tony
2011-10-12  0:20               ` Andi Kleen
2011-10-12 10:44               ` Borislav Petkov
2011-10-12 15:59                 ` Vivek Goyal
2011-10-12 15:51               ` Vivek Goyal
2011-10-14 11:30                 ` K.Prasad
2011-10-14 14:14                   ` Vivek Goyal
2011-10-18 17:41                     ` K.Prasad
2011-10-11 18:55             ` Luck, Tony
2011-10-04 14:30   ` Vivek Goyal
2011-10-05  7:41     ` K.Prasad
2011-10-05 15:40       ` Vivek Goyal
2011-10-05 15:58         ` Luck, Tony
2011-10-05 16:25           ` Borislav Petkov
2011-10-05 17:10           ` Vivek Goyal
2011-10-05 17:20             ` Borislav Petkov
2011-10-05 17:29               ` Vivek Goyal
2011-10-05 17:43                 ` Borislav Petkov
2011-10-05 18:00                 ` Dave Anderson
2011-10-05 18:09                   ` Vivek Goyal
2011-10-04 15:04   ` Nick Bowler
2011-10-07 16:36     ` K.Prasad
2011-10-07 18:19       ` Nick Bowler
2011-10-03  7:35 ` [Patch 2/4][kexec-tools] Recognise NT_NOCOREDUMP elf-note type K.Prasad
2011-10-03  7:37 ` [Patch 3/4][makedumpfile] Capture slimdump if elf-note NT_NOCOREDUMP present K.Prasad
2011-10-03  7:45 ` [Patch 4/4][crash] Recognise elf-note of type NT_NOCOREDUMP before vmcore analysis K.Prasad

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