From: Dave Young <dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
Cc: bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
tom.vaden-VXdhtT5mjnY@public.gmane.org,
rwright-VXdhtT5mjnY@public.gmane.org,
linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
lisa.mitchell-VXdhtT5mjnY@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
"Li, Zhen-Hua" <zhen-hual-VXdhtT5mjnY@public.gmane.org>,
doug.hatch-VXdhtT5mjnY@public.gmane.org,
ishii.hironobu-+CUm20s59erQFUHtdCDX3A@public.gmane.org,
bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
billsumnerlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
li.zhang6-VXdhtT5mjnY@public.gmane.org,
dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
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-zLv9SwRftAIdnm+yROfE0A@public.gmane.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
[not found] ` <1426743388-26908-1-git-send-email-zhen-hual-VXdhtT5mjnY@public.gmane.org>
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
[not found] ` <20150402110608.GL4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
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
[not found] ` <20150402111133.GM4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-04-03 7:54 ` Li, ZhenHua
2015-04-03 8:28 ` Dave Young
[not found] ` <20150403082816.GE22579-0VdLhd/A9PldIt/LePPtNh/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2015-04-03 8:31 ` Li, ZhenHua
2015-04-03 8:40 ` Dave Young
[not found] ` <20150403084031.GF22579-0VdLhd/A9PldIt/LePPtNh/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
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
[not found] ` <20150403092111.GG22579-0VdLhd/A9PldIt/LePPtNh/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
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
[not found] ` <5523A977.1030707-VXdhtT5mjnY@public.gmane.org>
2015-04-08 3:33 ` Dave Young
[not found] ` <20150407034622.GB7213-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2015-04-07 14:12 ` Don Dutile
2015-05-07 14:00 ` Dave Young
[not found] ` <20150507140029.GC4559-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2015-05-07 14:25 ` Don Dutile
2015-05-08 1:21 ` Dave Young
[not found] ` <20150508012118.GA4809-0VdLhd/A9PlTxLCkMk2GaBcY2uh10dtjAL8bYrjMMd8@public.gmane.org>
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
[not found] ` <20150505060931.GB31063-0VdLhd/A9PlTxLCkMk2GaBcY2uh10dtjAL8bYrjMMd8@public.gmane.org>
2015-05-05 15:23 ` Joerg Roedel
2015-05-06 1:46 ` Dave Young
[not found] ` <20150506014649.GA14065-0VdLhd/A9PlTxLCkMk2GaBcY2uh10dtjAL8bYrjMMd8@public.gmane.org>
2015-05-06 8:16 ` Joerg Roedel
[not found] ` <20150506081617.GB20611-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
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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