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From: Simon Horman <horms@verge.net.au>
To: Dave Young <dyoung@redhat.com>
Cc: iommu@lists.linux-foundation.org, luyu@redhat.com,
	kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	vgoyal@redhat.com
Subject: Re: [PATCH] intel-iommu:make identity_map default for crash dump
Date: Sat, 22 Oct 2011 10:08:21 +0900	[thread overview]
Message-ID: <20111022010821.GF21850@verge.net.au> (raw)
In-Reply-To: <20111021123154.GA5821@darkstar.nay.redhat.com>

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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WARNING: multiple messages have this Message-ID (diff)
From: Simon Horman <horms@verge.net.au>
To: Dave Young <dyoung@redhat.com>
Cc: kexec@lists.infradead.org, iommu@lists.linux-foundation.org,
	vgoyal@redhat.com, linux-kernel@vger.kernel.org, luyu@redhat.com
Subject: Re: [PATCH] intel-iommu:make identity_map default for crash dump
Date: Sat, 22 Oct 2011 10:08:21 +0900	[thread overview]
Message-ID: <20111022010821.GF21850@verge.net.au> (raw)
In-Reply-To: <20111021123154.GA5821@darkstar.nay.redhat.com>

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.

  reply	other threads:[~2011-10-22  1:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-21 12:31 [PATCH] intel-iommu:make identity_map default for crash dump Dave Young
2011-10-21 12:31 ` Dave Young
2011-10-22  1:08 ` Simon Horman [this message]
2011-10-22  1:08   ` Simon Horman

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