From: Zachary Amsden <zach@vmware.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@muc.de>,
Rusty Russell <rusty@rustcorp.com.au>,
Chris Wright <chrisw@sous-sol.org>,
Hugh Dickins <hugh@veritas.com>,
David Rientjes <rientjes@google.com>,
Michel Lespinasse <walken@vmware.com>,
Virtualization Mailing List <virtualization@lists.osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/4] Pte drop ptep_get_and_clear paravirt op.patch
Date: Thu, 12 Apr 2007 12:47:52 -0700 [thread overview]
Message-ID: <461E8CE8.2070808@vmware.com> (raw)
In-Reply-To: <461E8D16.6060202@goop.org>
Jeremy Fitzhardinge wrote:
> Zachary Amsden wrote:
>
>> In shadow mode hypervisors, ptep_get_and_clear achieves the desired
>> purpose of keeping the shadows in sync by issuing a native_get_and_clear,
>> followed by a call to pte_update, which indicates the PTE has been
>> modified.
>>
>> Direct mode hypervisors (Xen) have no need for this anyway, and will trap
>> the update using writable pagetables.
>>
>> This means no hypervisor makes use of ptep_get_and_clear; there is no
>> reason to have it in the paravirt-ops structure. Change confusing
>> terminology about raw vs. native functions into consistent use of
>> native_pte_xxx for operations which do not invoke paravirt-ops.
>>
>>
>
> Looks OK to me. Are you going to put this into the pvops queue?
>
> Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Yes, the rest are still undergoing feedback. I'll kick this in and
fixup the damage it causes.
Zach
next prev parent reply other threads:[~2007-04-12 19:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-12 5:30 [PATCH 1/4] Pte drop ptep_get_and_clear paravirt op.patch Zachary Amsden
2007-04-12 19:48 ` Jeremy Fitzhardinge
2007-04-12 19:47 ` Zachary Amsden [this message]
2007-04-17 13:32 ` Jeremy Fitzhardinge
2007-04-17 11:18 ` Zachary Amsden
2007-04-18 13:05 ` Jeremy Fitzhardinge
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