From: Joerg Roedel <joro@8bytes.org>
To: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>, "Li, ZhenHua" <zhen-hual@hp.com>,
dwmw2@infradead.org, indou.takao@jp.fujitsu.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 v10 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel
Date: Mon, 4 May 2015 18:23:18 +0200 [thread overview]
Message-ID: <20150504162318.GH15736@8bytes.org> (raw)
In-Reply-To: <20150424084957.GC23912@dhcp-128-91.nay.redhat.com>
On Fri, Apr 24, 2015 at 04:49:57PM +0800, Dave Young wrote:
> I'm more than happy to see this issue can be fixed in the patchset, I
> do not agree to add the code there with such problems. OTOH, for now
> seems there's no way to fix it.
And that's the point. We discuss this issue and possible solutions for
years by now, and what ZhenHua implemented is what we agreed to be the
best-effort on what we can do in the kdump case with IOMMU enabled.
Of course there are still failure scenarios left, but that is not
different from systems without any IOMMU.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Dave Young <dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Baoquan He <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, ZhenHua" <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 v10 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel
Date: Mon, 4 May 2015 18:23:18 +0200 [thread overview]
Message-ID: <20150504162318.GH15736@8bytes.org> (raw)
In-Reply-To: <20150424084957.GC23912-0VdLhd/A9Pns0dwjj9W26R/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
On Fri, Apr 24, 2015 at 04:49:57PM +0800, Dave Young wrote:
> I'm more than happy to see this issue can be fixed in the patchset, I
> do not agree to add the code there with such problems. OTOH, for now
> seems there's no way to fix it.
And that's the point. We discuss this issue and possible solutions for
years by now, and what ZhenHua implemented is what we agreed to be the
best-effort on what we can do in the kdump case with IOMMU enabled.
Of course there are still failure scenarios left, but that is not
different from systems without any IOMMU.
Joerg
next prev parent reply other threads:[~2015-05-04 16:23 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-10 8:42 [PATCH v10 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 01/10] iommu/vt-d: New function to attach domain with id Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 02/10] iommu/vt-d: Items required for kdump Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 03/10] iommu/vt-d: Function to get old context entry Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 04/10] iommu/vt-d: functions to copy data from old mem Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-05-07 7:49 ` Baoquan He
2015-05-07 7:49 ` Baoquan He
2015-05-07 8:33 ` Li, ZhenHua
2015-05-07 8:33 ` Li, ZhenHua
2015-05-07 8:33 ` Li, ZhenHua
2015-04-10 8:42 ` [PATCH v10 05/10] iommu/vt-d: Add functions to load and save old re Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 06/10] iommu/vt-d: datatypes and functions used for kdump Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 07/10] iommu/vt-d: enable kdump support in iommu module Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 08/10] iommu/vt-d: assign new page table for dma_map Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 09/10] iommu/vt-d: Copy functions for irte Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` [PATCH v10 10/10] iommu/vt-d: Use old irte in kdump kernel Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-10 8:42 ` Li, Zhen-Hua
2015-04-15 0:57 ` [PATCH v10 0/10] iommu/vt-d: Fix intel vt-d faults " Dave Young
2015-04-15 5:47 ` Li, ZhenHua
2015-04-15 5:47 ` Li, ZhenHua
2015-04-15 5:47 ` Li, ZhenHua
2015-04-15 6:48 ` Dave Young
2015-04-15 6:48 ` Dave Young
2015-04-21 1:39 ` Li, ZhenHua
2015-04-21 1:39 ` Li, ZhenHua
2015-04-21 2:53 ` Dave Young
2015-04-21 2:53 ` Dave Young
2015-04-21 2:53 ` Dave Young
2015-04-24 8:01 ` Baoquan He
2015-04-24 8:01 ` Baoquan He
2015-04-24 8:25 ` Dave Young
2015-04-24 8:25 ` Dave Young
2015-04-24 8:35 ` Baoquan He
2015-04-24 8:35 ` Baoquan He
2015-04-24 8:49 ` Dave Young
2015-04-24 8:49 ` Dave Young
2015-04-28 8:54 ` Baoquan He
2015-04-28 8:54 ` Baoquan He
2015-04-28 9:00 ` Li, ZhenHua
2015-04-28 9:00 ` Li, ZhenHua
2015-05-04 16:23 ` Joerg Roedel [this message]
2015-05-04 16:23 ` Joerg Roedel
2015-05-05 6:14 ` Dave Young
2015-05-05 6:14 ` Dave Young
2015-05-05 15:31 ` Joerg Roedel
2015-05-05 15:31 ` Joerg Roedel
2015-05-06 1:51 ` Dave Young
2015-05-06 1:51 ` Dave Young
2015-05-06 1:51 ` Dave Young
2015-05-06 2:37 ` Li, ZhenHua
2015-05-06 2:37 ` Li, ZhenHua
2015-05-06 2:37 ` Li, ZhenHua
2015-05-06 8:25 ` Joerg Roedel
2015-05-06 8:25 ` Joerg Roedel
2015-04-23 8:35 ` Li, ZhenHua
2015-04-23 8:35 ` Li, ZhenHua
2015-04-23 8:35 ` Li, ZhenHua
2015-04-23 8:38 ` Li, ZhenHua
2015-04-23 8:38 ` Li, ZhenHua
2015-04-23 8:38 ` Li, ZhenHua
2015-04-29 11:20 ` Baoquan He
2015-04-29 11:20 ` Baoquan He
2015-04-29 11:20 ` Baoquan He
2015-05-03 8:55 ` Baoquan He
2015-05-03 8:55 ` Baoquan He
2015-05-03 8:55 ` Baoquan He
2015-05-04 3:06 ` Li, ZhenHua
2015-05-04 3:06 ` Li, ZhenHua
2015-05-04 3:06 ` Li, ZhenHua
2015-05-04 3:17 ` Baoquan He
2015-05-04 3:17 ` Baoquan He
2015-05-07 17:32 ` Joerg Roedel
2015-05-07 17:32 ` Joerg Roedel
2015-05-08 1:00 ` Li, ZhenHua
2015-05-08 1:00 ` Li, ZhenHua
2015-05-08 1:00 ` Li, ZhenHua
2015-06-11 15:40 ` David Woodhouse
2015-06-11 15:40 ` David Woodhouse
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