linux-kernel - Re: [PATCH v9 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

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Message-ID: <551E4FC4.3030601@hp.com>
Date:	Fri, 03 Apr 2015 16:31:00 +0800
From:	"Li, ZhenHua" <zhen-hual@...com>
To:	Dave Young <dyoung@...hat.com>
CC:	dwmw2@...radead.org, indou.takao@...fujitsu.com, bhe@...hat.com,
	joro@...tes.org, vgoyal@...hat.com,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, kexec@...ts.infradead.org,
	alex.williamson@...hat.com, ddutile@...hat.com,
	ishii.hironobu@...fujitsu.com, bhelgaas@...gle.com,
	doug.hatch@...com, jerry.hoemann@...com, tom.vaden@...com,
	li.zhang6@...com, lisa.mitchell@...com, billsumnerlinux@...il.com,
	rwright@...com, "Li, ZhenHua" <zhen-hual@...com>
Subject: Re: [PATCH v9 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

On 04/03/2015 04:28 PM, Dave Young wrote:
> On 03/19/15 at 01:36pm, Li, Zhen-Hua wrote:
>> This patchset is an update of Bill Sumner's patchset, implements a fix for:
>> If a kernel boots with intel_iommu=on on a system that supports intel vt-d,
>> when a panic happens, the kdump kernel will boot with these faults:
> Zhenhua,
>
> I will review the patchset recently, sorry for jumping in late.
>
> Thanks
> Dave
>
Hi Dave,
Thanks for your review. And please also take a look at the plan I sent 
in another mail:

Change use of
      if (is_kdump_kernel()) { }

To:
     if (iommu_enabled_in_last_kernel) { }

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