From: Bernhard Walle <bernhard.walle@gmx.de>
To: Andi Kleen <andi@firstfloor.org>
Cc: Neil Horman <nhorman@redhat.com>,
tony.luck@intel.com, linux-ia64@vger.kernel.org,
Amerigo Wang <amwang@redhat.com>,
Kexec Mailing List <kexec@lists.infradead.org>,
linux-kernel@vger.kernel.org,
"Eric W. Biederman" <ebiederm@xmission.com>,
akpm@linux-foundation.org,
Anton Vorontsov <avorontsov@ru.mvista.com>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [Patch 0/7] Implement crashkernel=auto
Date: Fri, 07 Aug 2009 23:26:09 +0200 [thread overview]
Message-ID: <4A7C9BF1.8070700@gmx.de> (raw)
In-Reply-To: <20090807210306.GA25609@basil.fritz.box>
Andi Kleen schrieb:
>> As an initial approximation I would use a 32nd of low memory.
>
> That means a 1TB machine will have a 32GB crash kernel.
>
> Surely that's excessive?!?
>
> It would be repeating all the same mistakes people made with hash tables
> several years ago.
The idea of Eric was to shrink the reserved memory in an init script. I
doubt that the 1 TB machine will have any problems or performance issue
when booting with (1 TB - 32 GB) memory.
> It doesn't sound reasonable to Andi.
>
> Why do you even want to grow the crash kernel that much? Is there
> any real problem with a 64-128MB crash kernel?
Try it out. No chance for 64-128MB crashkernel on "medium" IA64 machines.
Regards,
Bernhard
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next prev parent reply other threads:[~2009-08-07 21:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090805112123.6552.73574.sendpatchset@localhost.localdomain>
[not found] ` <m1eirqtmey.fsf@fess.ebiederm.org>
[not found] ` <20090805140408.GJ7259@hmsreliant.think-freely.org>
[not found] ` <m1skg5vpgg.fsf@fess.ebiederm.org>
[not found] ` <4A7A3A78.7080200@redhat.com>
[not found] ` <m1y6pxr737.fsf@fess.ebiederm.org>
[not found] ` <4A7A506B.2060008@redhat.com>
[not found] ` <m1ljlxsiox.fsf@fess.ebiederm.org>
[not found] ` <4A7A70E5.2010204@redhat.com>
[not found] ` <m1bpmtqxjh.fsf@fess.ebiederm.org>
[not found] ` <4A7A7A0F.6070906@redhat.com>
[not found] ` <m1iqh1nxv3.fsf@fess.ebiederm.org>
[not found] ` <4A7A9E54.60705@redhat.com>
2009-08-07 19:50 ` [Patch 0/7] Implement crashkernel=auto Eric W. Biederman
2009-08-07 21:03 ` Andi Kleen
2009-08-07 21:26 ` Bernhard Walle [this message]
2009-08-07 22:06 ` Eric W. Biederman
2009-08-07 21:31 ` Bernhard Walle
2009-08-07 22:16 ` Eric W. Biederman
2009-08-10 3:11 ` Amerigo Wang
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