linux-kernel - Re: [PATCH] intel-iommu:make identity

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Message-ID: <20111022010821.GF21850@verge.net.au>
Date:	Sat, 22 Oct 2011 10:08:21 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Dave Young <dyoung@...hat.com>
Cc:	kexec@...ts.infradead.org, iommu@...ts.linux-foundation.org,
	vgoyal@...hat.com, linux-kernel@...r.kernel.org, luyu@...hat.com
Subject: Re: [PATCH] intel-iommu:make identity_map default for crash dump

On Fri, Oct 21, 2011 at 08:31:54PM +0800, Dave Young wrote:
> kdump kernel sometimes will get DMAR faults which
> is caused by random in-flight dma from 1st kernel
> 
> Here make the identity_mapping as default for this case

This seems reasonable to me. Although I am curious to know
what the side effects of using IDENTMAP_ALL might be.
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