From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: "Cornwall, Jay" <Jay.Cornwall-5C7GfCeVMHo@public.gmane.org>
Cc: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
"Naru, Kim" <Kim.Naru-5C7GfCeVMHo@public.gmane.org>,
"Hurwitz, Sherry" <sherry.hurwitz-5C7GfCeVMHo@public.gmane.org>
Subject: Re: [PATCH] iommu/amd: Fix for L2 race with VM invalidation
Date: Tue, 20 May 2014 15:32:45 +0200 [thread overview]
Message-ID: <20140520133245.GE17056@8bytes.org> (raw)
In-Reply-To: <99CB3FADB756624A867BE9481439561C334C9045-XjPeyzlH3nQYUXYKxDj4HkEOCMrvLtNR@public.gmane.org>
On Wed, May 14, 2014 at 11:38:25AM +0000, Cornwall, Jay wrote:
> Hi,
>
> I'm not sure why you're submitting this, Suravee?
>
> We already agreed that we need the extra mmu_notifier point, proposed
> by Joerg back in 2011, to eliminate the race. I had thought we were
> waiting on that to be implemented.
Speaking of this, would it also be possible to hold back all faults (so
not sending back ppr-comletions) between invalidate_range_start/end()?
Or will the hardware run into a timeout when it takes too long to
process a fault or when it issued the maximum number of parallel faults?
Regards,
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: "Cornwall, Jay" <Jay.Cornwall@amd.com>
Cc: "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@amd.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"Hurwitz, Sherry" <sherry.hurwitz@amd.com>,
"Naru, Kim" <Kim.Naru@amd.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] iommu/amd: Fix for L2 race with VM invalidation
Date: Tue, 20 May 2014 15:32:45 +0200 [thread overview]
Message-ID: <20140520133245.GE17056@8bytes.org> (raw)
In-Reply-To: <99CB3FADB756624A867BE9481439561C334C9045@satlexdag03.amd.com>
On Wed, May 14, 2014 at 11:38:25AM +0000, Cornwall, Jay wrote:
> Hi,
>
> I'm not sure why you're submitting this, Suravee?
>
> We already agreed that we need the extra mmu_notifier point, proposed
> by Joerg back in 2011, to eliminate the race. I had thought we were
> waiting on that to be implemented.
Speaking of this, would it also be possible to hold back all faults (so
not sending back ppr-comletions) between invalidate_range_start/end()?
Or will the hardware run into a timeout when it takes too long to
process a fault or when it issued the maximum number of parallel faults?
Regards,
Joerg
next prev parent reply other threads:[~2014-05-20 13:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 6:34 [PATCH] iommu/amd: Fix for L2 race with VM invalidation suravee.suthikulpanit-5C7GfCeVMHo
2014-05-14 6:34 ` suravee.suthikulpanit
[not found] ` <1400049252-4213-1-git-send-email-suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
2014-05-14 9:29 ` Joerg Roedel
2014-05-14 9:29 ` Joerg Roedel
[not found] ` <20140514092920.GB6026-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-05-14 11:38 ` Cornwall, Jay
2014-05-14 11:38 ` Cornwall, Jay
[not found] ` <99CB3FADB756624A867BE9481439561C334C9045-XjPeyzlH3nQYUXYKxDj4HkEOCMrvLtNR@public.gmane.org>
2014-05-20 13:32 ` Joerg Roedel [this message]
2014-05-20 13:32 ` Joerg Roedel
2014-05-20 13:53 ` Cornwall, Jay
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