linux-kernel - Re: [RFC v2 0/2] Early use of boot service memory

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Message-ID: <CAE9FiQUx5rnA0kpqXRQYtpj9Qk-4bPGaUKEbbF=XHsZbnSd6Rg@mail.gmail.com>
Date:	Thu, 21 Nov 2013 17:29:01 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	jerry.hoemann@...com, Vivek Goyal <vgoyal@...hat.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Rob Landley <rob@...dley.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Matt Fleming <matt.fleming@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...e.de>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-efi@...r.kernel.org, Pekka Enberg <penberg@...nel.org>,
	Ingo Molnar <mingo.kernel.org@...il.com>
Subject: Re: [RFC v2 0/2] Early use of boot service memory

On Thu, Nov 21, 2013 at 5:25 PM,  <jerry.hoemann@...com> wrote:
> On Thu, Nov 21, 2013 at 05:12:57PM -0800, H. Peter Anvin wrote:
>
> Large systems w/ lots of IO require large crash kernel allocations for
> the kernel to boot.  Then you have to worry about the OOM killer.....

so go with crashkernel=1024M,high.

>
> makedumpfile going to cyclic buffer has helped out greatly, but on
> our new systems we're still looking at 512 MB crash kernels.

I tried 6TiB system/16 PCIE cards, kdump on RHEL 6.5 beta still does not work.
still get OOM.

Thanks

Yinghai
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