linux-kernel - Re: [PATCH v10 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150504162318.GH15736@8bytes.org>
Date:	Mon, 4 May 2015 18:23:18 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Dave Young <dyoung@...hat.com>
Cc:	Baoquan He <bhe@...hat.com>, "Li, ZhenHua" <zhen-hual@...com>,
	dwmw2@...radead.org, indou.takao@...fujitsu.com, 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
Subject: Re: [PATCH v10 0/10] iommu/vt-d: Fix intel vt-d faults in kdump
 kernel

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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/