From: Zachary Amsden <zach@vmware.com>
To: Rik van Riel <riel@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
Linus Torvalds <torvalds@osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Virtualization Mailing List <virtualization@lists.osdl.org>,
Xen-devel <xen-devel@lists.xensource.com>,
Andrew Morton <akpm@osdl.org>, Dan Hecht <dhecht@vmware.com>,
Dan Arai <arai@vmware.com>, Anne Holler <anne@vmware.com>,
Pratap Subrahmanyam <pratap@vmware.com>,
Christopher Li <chrisl@vmware.com>,
Joshua LeVasseur <jtl@ira.uka.de>, Chris Wright <chrisw@osdl.org>,
Jyothy Reddy <jreddy@vmware.com>, Jack Lo <jlo@vmware.com>,
Kip Macy <kmacy@fsmware.com>, Jan Beulich <jbeulich@novell.com>,
Ky Srinivasan <ksrinivasan@novell.com>,
Wim Coekaerts <wim.coekaerts@oracle.com>,
Leendert van Doorn <leendert@watson.ibm.com>
Subject: Re: [RFC, PATCH 0/24] VMI i386 Linux virtualization interface proposal
Date: Mon, 13 Mar 2006 20:55:57 -0800 [thread overview]
Message-ID: <44164CDD.6030608@vmware.com> (raw)
In-Reply-To: <Pine.LNX.4.63.0603132304200.17874@cuia.boston.redhat.com>
Rik van Riel wrote:
> On Mon, 13 Mar 2006, Zachary Amsden wrote:
>
>
>> About performance - I actually believe that it is possible to implement
>> VMI Linux in such a way that it actually has _better_ performance on Xen
>> than the current XenoLinux kernels.
>>
>
> How would VMI allow page table batching at fault time?
> (one of the future optimizations that are probably worth
> making for Xen)
>
This is exactly what we do. All page table transitions from P->NP or
P->P already require a flushing call (FlushTLB or InvalPage). The
remaining transitions, NP->P require explicit flushing, and we have
added the appropriate call sites to do so. It turns out, the external
MMU cache on Sparc provided exactly the required hook point in this case
- update_mmu_cache().
Zach
next prev parent reply other threads:[~2006-03-14 4:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-13 17:58 [RFC, PATCH 0/24] VMI i386 Linux virtualization interface proposal Zachary Amsden
2006-03-13 18:09 ` Arjan van de Ven
2006-03-13 18:22 ` Zachary Amsden
2006-03-13 18:26 ` Arjan van de Ven
2006-03-13 18:30 ` Zachary Amsden
2006-03-13 18:42 ` Arjan van de Ven
2006-03-13 18:48 ` Zachary Amsden
2006-03-13 19:02 ` Chris Wright
2006-03-13 18:56 ` Joshua LeVasseur
2006-03-16 18:52 ` Jan Engelhardt
2006-03-13 18:56 ` Hollis Blanchard
2006-03-13 18:59 ` Zachary Amsden
2006-03-15 10:25 ` Christoph Hellwig
2006-03-15 15:57 ` Zachary Amsden
2006-03-15 17:38 ` Joshua LeVasseur
2006-03-15 20:02 ` Andrew Morton
2006-03-16 0:05 ` Joshua LeVasseur
2006-03-13 20:17 ` Sam Vilain
2006-03-14 0:39 ` Anthony Liguori
2006-03-14 4:01 ` Zachary Amsden
2006-03-14 4:04 ` Rik van Riel
2006-03-14 4:55 ` Zachary Amsden [this message]
2006-03-14 4:13 ` Anthony Liguori
2006-03-14 4:26 ` Zachary Amsden
2006-03-14 4:30 ` Rik van Riel
2006-03-14 5:46 ` Zachary Amsden
2006-03-14 12:44 ` Rik van Riel
2006-03-14 16:22 ` Zachary Amsden
2006-03-16 18:58 ` Jan Engelhardt
-- strict thread matches above, loose matches on Subject: below --
2006-03-17 15:56 Chuck Ebbert
2006-03-17 17:52 ` Zachary Amsden
2006-03-20 22:03 Anne Holler
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