From: Andi Kleen <andi@firstfloor.org>
To: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: oomichi@mxs.nes.nec.co.jp, Nick Bowler <nbowler@elliptictech.com>,
"Luck, Tony" <tony.luck@intel.com>,
Valdis.Kletnieks@vt.edu, 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, Vivek Goyal <vgoyal@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, 12 Oct 2011 02:20:32 +0200 [thread overview]
Message-ID: <20111012002032.GF14482@one.firstfloor.org> (raw)
In-Reply-To: <20111011184434.GB32316@in.ibm.com>
> So, in any case we may not be able to disable machine-check exceptions
> (MCEs) only within the context of kexec'ed kernel. Let me know if I've
> missed something here.
You can disable signalling in the main machine check register,
then you won't get any machine check interrupts. No need to mess
with any CPU specific banks.
See the old mce tree that kernel.org ate for a patch that just did that
during the kcore copy.
-Andi
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WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>, Vivek Goyal <vgoyal@redhat.com>,
linux-kernel@vger.kernel.org, crash-utility@redhat.com,
kexec@lists.infradead.org, Andi Kleen <andi@firstfloor.org>,
"Luck, Tony" <tony.luck@intel.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
anderson@redhat.com, tachibana@mxm.nes.nec.co.jp,
oomichi@mxs.nes.nec.co.jp, Valdis.Kletnieks@vt.edu,
Nick Bowler <nbowler@elliptictech.com>
Subject: Re: [Patch 1/4][kernel][slimdump] Add new elf-note of type NT_NOCOREDUMP to capture slimdump
Date: Wed, 12 Oct 2011 02:20:32 +0200 [thread overview]
Message-ID: <20111012002032.GF14482@one.firstfloor.org> (raw)
In-Reply-To: <20111011184434.GB32316@in.ibm.com>
> So, in any case we may not be able to disable machine-check exceptions
> (MCEs) only within the context of kexec'ed kernel. Let me know if I've
> missed something here.
You can disable signalling in the main machine check register,
then you won't get any machine check interrupts. No need to mess
with any CPU specific banks.
See the old mce tree that kernel.org ate for a patch that just did that
during the kcore copy.
-Andi
next prev parent reply other threads:[~2011-10-12 0:20 UTC|newest]
Thread overview: 102+ 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 7:07 ` 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 7:32 ` K.Prasad
2011-10-03 10:10 ` Eric W. Biederman
2011-10-03 10:10 ` Eric W. Biederman
2011-10-03 12:03 ` K.Prasad
2011-10-03 12:03 ` K.Prasad
2011-10-04 6:34 ` Borislav Petkov
2011-10-04 6:34 ` Borislav Petkov
2011-10-05 7:07 ` K.Prasad
2011-10-05 7:07 ` K.Prasad
2011-10-05 7:31 ` Borislav Petkov
2011-10-05 7:31 ` Borislav Petkov
2011-10-05 9:47 ` K.Prasad
2011-10-05 9:47 ` K.Prasad
2011-10-05 12:41 ` Borislav Petkov
2011-10-05 12:41 ` Borislav Petkov
2011-10-05 15:52 ` Vivek Goyal
2011-10-05 15:52 ` Vivek Goyal
2011-10-05 16:00 ` Valdis.Kletnieks
2011-10-05 16:16 ` Borislav Petkov
2011-10-05 16:16 ` Borislav Petkov
2011-10-05 17:20 ` Vivek Goyal
2011-10-05 17:20 ` Vivek Goyal
2011-10-05 17:13 ` Vivek Goyal
2011-10-05 17:13 ` Vivek Goyal
2011-10-05 11:55 ` Valdis.Kletnieks
2011-10-05 12:31 ` Borislav Petkov
2011-10-05 12:31 ` Borislav Petkov
2011-10-05 15:19 ` Vivek Goyal
2011-10-05 15:19 ` Vivek Goyal
2011-10-05 15:30 ` Vivek Goyal
2011-10-05 15:30 ` Vivek Goyal
2011-10-03 22:53 ` Luck, Tony
2011-10-03 22:53 ` Luck, Tony
2011-10-04 14:04 ` Vivek Goyal
2011-10-04 14:04 ` Vivek Goyal
2011-10-05 7:18 ` K.Prasad
2011-10-05 7:18 ` K.Prasad
2011-10-05 7:33 ` Borislav Petkov
2011-10-05 7:33 ` Borislav Petkov
2011-10-05 9:23 ` K.Prasad
2011-10-05 9:23 ` K.Prasad
2011-10-05 15:25 ` Vivek Goyal
2011-10-05 15:25 ` Vivek Goyal
2011-10-07 16:12 ` K.Prasad
2011-10-07 16:12 ` K.Prasad
2011-10-10 7:07 ` Borislav Petkov
2011-10-10 7:07 ` Borislav Petkov
2011-10-11 18:44 ` K.Prasad
2011-10-11 18:44 ` K.Prasad
2011-10-11 18:59 ` Luck, Tony
2011-10-11 18:59 ` Luck, Tony
2011-10-12 0:20 ` Andi Kleen [this message]
2011-10-12 0:20 ` Andi Kleen
2011-10-12 10:44 ` Borislav Petkov
2011-10-12 10:44 ` Borislav Petkov
2011-10-12 15:59 ` Vivek Goyal
2011-10-12 15:59 ` Vivek Goyal
2011-10-12 15:51 ` Vivek Goyal
2011-10-12 15:51 ` Vivek Goyal
2011-10-14 11:30 ` K.Prasad
2011-10-14 11:30 ` K.Prasad
2011-10-14 14:14 ` Vivek Goyal
2011-10-14 14:14 ` Vivek Goyal
2011-10-18 17:41 ` K.Prasad
2011-10-18 17:41 ` K.Prasad
2011-10-11 18:55 ` Luck, Tony
2011-10-04 14:30 ` Vivek Goyal
2011-10-04 14:30 ` Vivek Goyal
2011-10-05 7:41 ` K.Prasad
2011-10-05 7:41 ` K.Prasad
2011-10-05 15:40 ` Vivek Goyal
2011-10-05 15:40 ` Vivek Goyal
2011-10-05 15:58 ` Luck, Tony
2011-10-05 16:25 ` Borislav Petkov
2011-10-05 16:25 ` Borislav Petkov
2011-10-05 17:10 ` Vivek Goyal
2011-10-05 17:10 ` Vivek Goyal
2011-10-05 17:20 ` Borislav Petkov
2011-10-05 17:20 ` Borislav Petkov
2011-10-05 17:29 ` Vivek Goyal
2011-10-05 17:29 ` Vivek Goyal
2011-10-05 17:43 ` Borislav Petkov
2011-10-05 17:43 ` Borislav Petkov
2011-10-05 18:00 ` Dave Anderson
2011-10-05 18:00 ` Dave Anderson
2011-10-05 18:09 ` Vivek Goyal
2011-10-05 18:09 ` Vivek Goyal
2011-10-04 15:04 ` Nick Bowler
2011-10-04 15:04 ` Nick Bowler
2011-10-07 16:36 ` K.Prasad
2011-10-07 16:36 ` K.Prasad
2011-10-07 18:19 ` Nick Bowler
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 7:35 ` K.Prasad
2011-10-03 7:37 ` [Patch 3/4][makedumpfile] Capture slimdump if elf-note NT_NOCOREDUMP present K.Prasad
2011-10-03 7:37 ` K.Prasad
2011-10-03 7:45 ` [Patch 4/4][crash] Recognise elf-note of type NT_NOCOREDUMP before vmcore analysis K.Prasad
2011-10-03 7:45 ` K.Prasad
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