linux-kernel - Re: [RFC Patch 6/6] Crash: Recognise slim coredumps and process new elf-note sections

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Message-ID: <m1hb8g6lfa.fsf@fess.ebiederm.org>
Date:	Fri, 27 May 2011 11:35:53 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	prasad@...ux.vnet.ibm.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	crash-utility@...hat.com, Andi Kleen <andi@...stfloor.org>,
	"Luck\, Tony" <tony.luck@...el.com>, kexec@...ts.infradead.org,
	anderson@...hat.com, Wang Chao <wang.chao@...fujitsu.com>,
	Michael Holzheu <holzheu@...ux.vnet.ibm.com>,
	Mahesh Jagannath Salgaonkar <mahesh@...ux.vnet.ibm.com>
Subject: Re: [RFC Patch 6/6] Crash: Recognise slim coredumps and process new elf-note sections

Vivek Goyal <vgoyal@...hat.com> writes:

> On Fri, May 27, 2011 at 11:16:34AM -0700, Eric W. Biederman wrote:
>> "K.Prasad" <prasad@...ux.vnet.ibm.com> writes:
>> 
>> > Crash: Recognise slim coredumps and process new elf-note sections
>> >
>> > The Linux kernel will begin to support SlimDump for certain types of crashes
>> > and the 'crash' tool needs to recognise them. For these types of coredumps, it
>> > need not lookout for usual elf-structures and start gdb. Also process new
>> > elf-note sections that contain additional information about the crash.
>> 
>> I suppose patching crash make sense.
>> 
>> Unfortunately crash doesn't work on  99% of the  kernels I run so, so I
>> stopped caring a while ago.
>
> Are these patched kernels? Otherwise Dave Anderson is pretty good about
> keeping crash running across multiple kernels.

Only slightly patched.  But they are definitely kernels I have built
myself.  It might just be a logistics problem where if I want to use
crash I need to upgrade it when I upgrade my kernels.

I got frustrated a while ago trying to get something out of crash
(and I'm afraid it shows), and I have just gone to extracting the
dmesg.  Which gives me all of the information I generally have time
to process.

Eric
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