From: Dave Young <dyoung@redhat.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: "Li, Zhen-Hua" <zhen-hual@hp.com>,
dwmw2@infradead.org, indou.takao@jp.fujitsu.com, bhe@redhat.com,
vgoyal@redhat.com, iommu@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
kexec@lists.infradead.org, alex.williamson@redhat.com,
ddutile@redhat.com, ishii.hironobu@jp.fujitsu.com,
bhelgaas@google.com, doug.hatch@hp.com, jerry.hoemann@hp.com,
tom.vaden@hp.com, li.zhang6@hp.com, lisa.mitchell@hp.com,
billsumnerlinux@gmail.com, rwright@hp.com
Subject: Re: [PATCH v9 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel
Date: Thu, 7 May 2015 21:25:36 +0800 [thread overview]
Message-ID: <20150507132536.GA4559@localhost.localdomain> (raw)
In-Reply-To: <20150506081617.GB20611@8bytes.org>
On 05/06/15 at 10:16am, Joerg Roedel wrote:
> On Wed, May 06, 2015 at 09:46:49AM +0800, Dave Young wrote:
> > For the original problem, the key issue is dmar faults cause kdump kernel
> > hang so that vmcore can not be saved. I do not know the reason why it hangs
> > I think it is acceptable if kdump kernel boot ok with some dma errors..
>
> It hangs because some devices can't handle the DMAR faults and the kdump
> kernel can't initialize them and will hang itself. For that it doesn't
> matter whether the fault was caused by a read or write request.
Ok, thanks for explanation. so it explains sometimes kdump kernel boot ok
with faults, sometimes it hangs instead.
Dave
next prev parent reply other threads:[~2015-05-07 13:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 5:36 [PATCH v9 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 01/10] iommu/vt-d: New function to attach domain with id Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 02/10] iommu/vt-d: Items required for kdump Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 03/10] iommu/vt-d: Function to get old context entry Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 04/10] iommu/vt-d: functions to copy data from old mem Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 05/10] iommu/vt-d: Add functions to load and save old re Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 06/10] iommu/vt-d: datatypes and functions used for kdump Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 07/10] iommu/vt-d: enable kdump support in iommu module Li, Zhen-Hua
2015-04-02 11:06 ` Joerg Roedel
2015-04-03 7:45 ` Li, ZhenHua
2015-03-19 5:36 ` [PATCH v9 08/10] iommu/vt-d: assign new page table for dma_map Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 09/10] iommu/vt-d: Copy functions for irte Li, Zhen-Hua
2015-03-19 5:36 ` [PATCH v9 10/10] iommu/vt-d: Use old irte in kdump kernel Li, Zhen-Hua
2015-04-02 11:11 ` [PATCH v9 0/10] iommu/vt-d: Fix intel vt-d faults " Joerg Roedel
2015-04-03 7:54 ` Li, ZhenHua
2015-04-03 8:28 ` Dave Young
2015-04-03 8:31 ` Li, ZhenHua
2015-04-03 8:40 ` Dave Young
2015-04-03 9:01 ` Li, ZhenHua
2015-04-03 9:21 ` Dave Young
2015-04-03 14:05 ` Li, Zhen-Hua
2015-04-07 3:49 ` Dave Young
2015-04-05 1:54 ` Baoquan He
2015-04-07 3:46 ` Dave Young
2015-04-07 9:08 ` Dave Young
2015-04-07 9:55 ` Li, ZhenHua
2015-04-08 3:33 ` Dave Young
2015-04-07 14:12 ` Don Dutile
2015-05-07 14:00 ` Dave Young
2015-05-07 14:25 ` Don Dutile
2015-05-08 1:21 ` Dave Young
2015-05-10 21:37 ` Don Dutile
2015-05-10 21:31 ` Don Dutile
2015-05-04 11:05 ` Joerg Roedel
2015-05-04 15:21 ` Don Dutile
2015-05-05 6:09 ` Dave Young
2015-05-05 15:23 ` Joerg Roedel
2015-05-06 1:46 ` Dave Young
2015-05-06 8:16 ` Joerg Roedel
2015-05-07 13:25 ` Dave Young [this message]
2015-05-07 13:56 ` Dave Young
2015-05-11 10:11 ` Joerg Roedel
2015-05-12 5:57 ` Dave Young
2015-05-12 6:41 ` Dave Young
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