linux-kernel - Re: [PATCH 1/2 V2] iommu/amd: Add workaround for ERBT1312

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Message-ID: <5177E3A8.5020001@redhat.com>
Date:	Wed, 24 Apr 2013 09:52:40 -0400
From:	Don Dutile <ddutile@...hat.com>
To:	Joerg Roedel <joro@...tes.org>
CC:	Suravee Suthikulanit <suravee.suthikulpanit@....com>,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2 V2] iommu/amd: Add workaround for ERBT1312

On 04/24/2013 06:46 AM, Joerg Roedel wrote:
> On Tue, Apr 23, 2013 at 09:22:45AM -0400, Don Dutile wrote:
>> Given other threads on this mail list (and I've seen crashes with same problem)
>> where this type of logging during a flood of IOMMU errors will lock up the machine,
>> is there something that can be done to break the do-while loop after n iterations
>> have been exec'd, so the kernel can progress during a crash ?
>
> In the case of an IOMMU error flood this loop will only run until the
> event-log/ppr-log overflows. So it should not turn into an endless loop.
>
>
> 	Joerg
>
>
Thanks for verification.

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