From: Andrea Arcangeli <aarcange@redhat.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Rik van Riel <riel@redhat.com>, Hugh Dickins <hughd@google.com>,
Mel Gorman <mgorman@suse.de>,
Johannes Weiner <jweiner@redhat.com>,
Jerome Glisse <jglisse@redhat.com>,
jroedel@suse.de, Jay.Cornwall@amd.com, Oded.Gabbay@amd.com,
John.Bridgman@amd.com, Suravee.Suthikulpanit@amd.com,
ben.sander@amd.com, Jesse Barnes <jbarnes@virtuousgeek.org>,
David Woodhouse <dwmw2@infradead.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
iommu@lists.linux-foundation.org
Subject: Re: [PATCH 0/3] mmu_notifier: Allow to manage CPU external TLBs
Date: Thu, 24 Jul 2014 16:44:49 +0200 [thread overview]
Message-ID: <20140724144449.GC27715@redhat.com> (raw)
In-Reply-To: <1406212541-25975-1-git-send-email-joro@8bytes.org>
On Thu, Jul 24, 2014 at 04:35:38PM +0200, Joerg Roedel wrote:
> To solve this situation I wrote a patch-set to introduce a
> new notifier call-back: mmu_notifer_invalidate_range(). This
> notifier lifts the strict requirements that no new
> references are taken in the range between _start() and
> _end(). When the subsystem can't guarantee that any new
> references are taken is has to provide the
> invalidate_range() call-back to clear any new references in
> there.
>
> It is called between invalidate_range_start() and _end()
> every time the VMM has to wipe out any references to a
> couple of pages. This are usually the places where the CPU
> TLBs are flushed too and where its important that this
> happens before invalidate_range_end() is called.
>
> Any comments and review appreciated!
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
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next prev parent reply other threads:[~2014-07-24 14:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 14:35 [PATCH 0/3] mmu_notifier: Allow to manage CPU external TLBs Joerg Roedel
[not found] ` <1406212541-25975-1-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-07-24 14:35 ` [PATCH 1/3] mmu_notifier: Add mmu_notifier_invalidate_range() Joerg Roedel
[not found] ` <1406212541-25975-2-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-07-25 20:16 ` Jesse Barnes
2014-07-25 20:43 ` Jerome Glisse
2014-07-25 21:38 ` Joerg Roedel
[not found] ` <20140725213806.GN14017-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2014-07-25 21:42 ` Jesse Barnes
2014-07-25 21:57 ` Joerg Roedel
2014-07-25 21:47 ` Jerome Glisse
2014-07-24 14:35 ` [PATCH 2/3] mmu_notifier: Call mmu_notifier_invalidate_range() from VMM Joerg Roedel
2014-07-24 14:35 ` [PATCH 3/3] mmu_notifier: Add the call-back for mmu_notifier_invalidate_range() Joerg Roedel
2014-07-24 14:44 ` Andrea Arcangeli [this message]
2014-07-24 23:33 ` [PATCH 0/3] mmu_notifier: Allow to manage CPU external TLBs Andrew Morton
2014-07-25 3:10 ` Sander, Ben
[not found] ` <20140724163303.df34065a3c3b26c0a4b3bab1-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2014-07-25 7:47 ` Joerg Roedel
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