linux-kernel - Re: [RFC PATCH] iommu/amd: fix a race in fetch

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Date:   Sun, 3 May 2020 20:39:27 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Qian Cai <cai@....pw>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] iommu/amd: fix a race in fetch_pte()

Hi Qian,

On Sun, May 03, 2020 at 09:04:03AM -0400, Qian Cai wrote:
> > On Apr 29, 2020, at 7:20 AM, Joerg Roedel <joro@...tes.org> wrote:
> > Can you please test this branch:
> > 
> > 	https://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git/log/?h=amd-iommu-fixes
> > 
> > It has the previous fix in it and a couple more to make sure the
> > device-table is updated and flushed before increase_address_space()
> > updates domain->pt_root.
> 
> I believe this closed the existing races as it had survived for many
> days. Great work!

Thanks a lot for testing these changes! Can I add your Tested-by when I
send them to the mailing list tomorrow?

Regards,

	Joerg