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From: Andi Kleen <andi@firstfloor.org>
To: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: "Luck, Tony" <tony.luck@intel.com>,
	kexec@lists.infradead.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andi Kleen <andi@firstfloor.org>,
	anderson@redhat.com, "Eric W. Biederman" <ebiederm@xmission.com>,
	Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes
Date: Thu, 26 May 2011 19:32:57 +0200	[thread overview]
Message-ID: <20110526173257.GC4065@one.firstfloor.org> (raw)
In-Reply-To: <20110526172305.GA18295@in.ibm.com>

On Thu, May 26, 2011 at 10:53:05PM +0530, K.Prasad wrote:
> 
> slimdump: Capture slimdump for fatal MCE generated crashes
> 
> System crashes resulting from fatal hardware errors (such as MCE) don't need
> all the contents from crashing-kernel's memory. Generate a new 'slimdump' that
> retains only essential information while discarding the old memory.

While this is a good idea, note there may be still poisoned lines
in memory that haven't resulted in a machine check yet, but could
still be fatal when read after a full crash dump for some other
reason.

So you still need 

http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=fe61906edce9e70d02481a77a617ba1397573dce
and
http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=cb58f049ae6709ddbab71be199390dc6852018cd

in addition.

-Andi

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andi Kleen <andi@firstfloor.org>,
	"Luck, Tony" <tony.luck@intel.com>,
	Vivek Goyal <vgoyal@redhat.com>,
	kexec@lists.infradead.org,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	anderson@redhat.com
Subject: Re: [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes
Date: Thu, 26 May 2011 19:32:57 +0200	[thread overview]
Message-ID: <20110526173257.GC4065@one.firstfloor.org> (raw)
In-Reply-To: <20110526172305.GA18295@in.ibm.com>

On Thu, May 26, 2011 at 10:53:05PM +0530, K.Prasad wrote:
> 
> slimdump: Capture slimdump for fatal MCE generated crashes
> 
> System crashes resulting from fatal hardware errors (such as MCE) don't need
> all the contents from crashing-kernel's memory. Generate a new 'slimdump' that
> retains only essential information while discarding the old memory.

While this is a good idea, note there may be still poisoned lines
in memory that haven't resulted in a machine check yet, but could
still be fatal when read after a full crash dump for some other
reason.

So you still need 

http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=fe61906edce9e70d02481a77a617ba1397573dce
and
http://git.kernel.org/?p=linux/kernel/git/ak/linux-mce-2.6.git;a=commit;h=cb58f049ae6709ddbab71be199390dc6852018cd

in addition.

-Andi

  reply	other threads:[~2011-05-26 17:33 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-26 17:07 [RFC Patch 0/6] slimdump: Enable slimdump if crashing kernel memory is not required K.Prasad
2011-05-26 17:07 ` K.Prasad
2011-05-26 17:12 ` [Patch 1/6] XPANIC: Add extended panic interface K.Prasad
2011-05-26 17:12   ` K.Prasad
2011-05-26 17:38   ` richard -rw- weinberger
2011-05-26 17:38     ` richard -rw- weinberger
2011-05-27 15:56     ` K.Prasad
2011-05-27 15:56       ` K.Prasad
2011-05-27 17:59   ` Eric W. Biederman
2011-05-27 17:59     ` Eric W. Biederman
2011-05-26 17:12 ` [Patch 2/6] x86: mce: Convert mce code to xpanic K.Prasad
2011-05-26 17:12   ` K.Prasad
2011-05-27 18:01   ` Eric W. Biederman
2011-05-27 18:01     ` Eric W. Biederman
2011-05-26 17:14 ` [Bugfix][Patch 3/3] Invoke vpanic inside xpanic function K.Prasad
2011-05-26 17:14   ` K.Prasad
2011-05-26 17:15 ` [RFC Patch 4/6] PANIC_MCE: Introduce a new panic flag for fatal MCE, capture related information K.Prasad
2011-05-26 17:15   ` K.Prasad
2011-05-26 18:43   ` Vivek Goyal
2011-05-26 18:43     ` Vivek Goyal
2011-05-27 17:03     ` K.Prasad
2011-05-27 17:03       ` K.Prasad
2011-05-27 18:29       ` Vivek Goyal
2011-05-27 18:29         ` Vivek Goyal
2011-05-27 18:04   ` Eric W. Biederman
2011-05-27 18:04     ` Eric W. Biederman
2011-05-31 17:40     ` K.Prasad
2011-05-31 17:40       ` K.Prasad
2011-06-01 17:18       ` Dave Anderson
2011-06-01 17:18         ` Dave Anderson
2011-06-01 17:23         ` Vivek Goyal
2011-06-01 17:23           ` Vivek Goyal
2011-06-01 17:41           ` Dave Anderson
2011-06-01 17:41             ` Dave Anderson
2011-06-08 17:16       ` K.Prasad
2011-06-08 17:16         ` K.Prasad
2011-06-12 15:44         ` Eric W. Biederman
2011-06-12 15:44           ` Eric W. Biederman
2011-06-15  2:06           ` K.Prasad
2011-06-15  2:06             ` K.Prasad
2011-05-27 18:09   ` Eric W. Biederman
2011-05-27 18:09     ` Eric W. Biederman
2011-05-26 17:23 ` [RFC Patch 5/6] slimdump: Capture slimdump for fatal MCE generated crashes K.Prasad
2011-05-26 17:23   ` K.Prasad
2011-05-26 17:32   ` Andi Kleen [this message]
2011-05-26 17:32     ` Andi Kleen
2011-05-27 15:53     ` K.Prasad
2011-05-27 15:53       ` K.Prasad
2011-05-26 17:44   ` Vivek Goyal
2011-05-26 17:44     ` Vivek Goyal
2011-05-26 18:09     ` Andi Kleen
2011-05-26 18:09       ` Andi Kleen
2011-05-26 18:26       ` Vivek Goyal
2011-05-26 18:26         ` Vivek Goyal
2011-05-26 18:58         ` Andi Kleen
2011-05-26 18:58           ` Andi Kleen
2011-05-26 19:10           ` Vivek Goyal
2011-05-26 19:10             ` Vivek Goyal
2011-05-26 23:44             ` Simon Horman
2011-05-26 23:44               ` Simon Horman
2011-05-27 16:57     ` K.Prasad
2011-05-27 16:57       ` K.Prasad
2011-05-27 17:59       ` Vivek Goyal
2011-05-27 17:59         ` Vivek Goyal
2011-06-08 17:00         ` K.Prasad
2011-06-08 17:00           ` K.Prasad
2011-05-27 18:14   ` Eric W. Biederman
2011-05-27 18:14     ` Eric W. Biederman
2011-05-26 17:26 ` [RFC Patch 6/6] Crash: Recognise slim coredumps and process new elf-note sections K.Prasad
2011-05-26 17:26   ` K.Prasad
2011-05-27 15:37   ` Mahesh J Salgaonkar
2011-05-27 15:37     ` Mahesh J Salgaonkar
2011-05-27 18:16   ` Eric W. Biederman
2011-05-27 18:16     ` Eric W. Biederman
2011-05-27 18:22     ` Vivek Goyal
2011-05-27 18:22       ` Vivek Goyal
2011-05-27 18:35       ` Eric W. Biederman
2011-05-27 18:35         ` Eric W. Biederman
2011-05-26 17:31 ` [RFC Patch 0/6] slimdump: Enable slimdump if crashing kernel memory is not required K.Prasad
2011-05-26 17:31   ` K.Prasad

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