linux-kernel - Re: [PATCH] x86, kdump: Set crashkernel

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Message-ID: <514766B7.4070303@zytor.com>
Date:	Mon, 18 Mar 2013 12:10:47 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	Yinghai Lu <yinghai@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	WANG Chao <chaowang@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86, kdump: Set crashkernel_low automatically

On 03/18/2013 08:33 AM, Vivek Goyal wrote:
> 
> Thinking more about it, if ongoing DMA is an issue, then setting up
> software iotlb in those areas is also prone to being overwritten by
> those DMAs. Hence, reserving memory low where no DMA is setup by first
> kernel, seems somewhat safer.
> 

Agreed.  We really should reserve some memory low.

	-hpa


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