From: Zachary Amsden <zach@vmware.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arjan van de Ven <arjan@infradead.org>, Andi Kleen <ak@muc.de>,
virtualization@lists.osdl.org,
Jeremy Fitzhardinge <jeremy@goop.org>,
Andrew Morton <akpm@osdl.org>, Chris Wright <chrisw@sous-sol.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] paravirt.h
Date: Tue, 22 Aug 2006 12:17:30 -0700 [thread overview]
Message-ID: <44EB584A.5070505@vmware.com> (raw)
In-Reply-To: <1156275004.27114.34.camel@localhost.localdomain>
Alan Cox wrote:
>
> - Stacked hypervisors stomping each others functions
>
Possibly an issue, but why would you ever want stacked paravirt-ops?
You're only talking to the hypervisor directly above you, and there is
only one of those.
> - Locking required to do updates: and remember our lock functions use
> methods in the array
>
Yes, locking is an issue, but it is possible to do. You just need to
stop interrupts, NMIs, and faults on all processors simultaneously.
Actually, it's not that scary - since you'll be doing it in a hypervisor.
> - If we boot patch inline code to get performance natively its almost
> impossible to then revert that.
>
You can patch back over it. I've already implemented the locking and
repatching bits for VMI.
Zach
next prev parent reply other threads:[~2006-08-22 19:17 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-10 9:35 [PATCH] paravirt.h Rusty Russell
2006-08-10 10:10 ` Rusty Russell
2006-08-10 10:30 ` Andi Kleen
2006-08-10 11:05 ` Rusty Russell
2006-08-10 11:31 ` Andi Kleen
2006-08-10 11:31 ` Andi Kleen
2006-08-10 13:03 ` Zachary Amsden
2006-08-10 15:14 ` Jeremy Fitzhardinge
[not found] ` <44DB54A5.50006@vmware.com>
[not found] ` <44DB6144.2080308@goop.org>
[not found] ` <1155262867.27719.2.camel@localhost.localdomain>
2006-08-11 2:34 ` Jeremy Fitzhardinge
2006-08-10 18:06 ` Jeremy Fitzhardinge
2006-08-19 1:21 ` Adrian Bunk
2006-08-19 2:46 ` Jeremy Fitzhardinge
2006-08-19 2:46 ` Jeremy Fitzhardinge
2006-08-20 8:50 ` Geert Uytterhoeven
2006-08-22 12:56 ` Jeremy Fitzhardinge
2006-08-22 14:08 ` Adrian Bunk
2006-08-22 14:08 ` Adrian Bunk
2006-08-22 13:56 ` Alan Cox
2006-08-22 13:56 ` Alan Cox
2006-08-22 13:44 ` Andi Kleen
2006-08-22 17:16 ` Zachary Amsden
2006-08-22 18:29 ` Arjan van de Ven
2006-08-22 19:30 ` Alan Cox
2006-08-22 19:17 ` Zachary Amsden [this message]
2006-08-22 19:26 ` Zachary Amsden
2006-08-22 19:29 ` Arjan van de Ven
2006-08-22 19:43 ` Zachary Amsden
2006-08-22 19:43 ` Zachary Amsden
2006-08-22 20:16 ` Andi Kleen
2006-08-22 22:02 ` Zachary Amsden
2006-08-23 1:55 ` Rusty Russell
2006-08-23 1:55 ` Rusty Russell
2006-08-23 2:12 ` Zachary Amsden
2006-08-23 7:56 ` Arjan van de Ven
2006-08-23 8:44 ` Zachary Amsden
2006-08-23 8:50 ` Andi Kleen
2006-08-23 9:01 ` Zachary Amsden
2006-08-23 9:06 ` Andi Kleen
2006-08-23 9:14 ` Zachary Amsden
2006-08-23 9:20 ` Andi Kleen
2006-08-23 9:36 ` Zachary Amsden
2006-08-23 9:41 ` Andi Kleen
2006-08-23 9:48 ` Zachary Amsden
2006-08-23 9:50 ` Andi Kleen
2006-08-23 10:03 ` Zachary Amsden
2006-08-23 10:03 ` Zachary Amsden
2006-08-23 11:24 ` Andi Kleen
2006-08-23 8:56 ` Arjan van de Ven
2006-08-23 8:18 ` Andi Kleen
2006-08-23 8:18 ` Andi Kleen
2006-08-23 8:38 ` Zachary Amsden
2006-08-22 21:36 ` Alan Cox
2006-08-22 13:45 ` Arjan van de Ven
2006-08-22 13:50 ` Andi Kleen
2006-08-22 14:25 ` Adrian Bunk
2006-08-22 14:25 ` Adrian Bunk
2006-08-22 14:54 ` Andi Kleen
2006-08-22 17:36 ` Zachary Amsden
2006-08-22 18:35 ` Alan Cox
2006-08-22 18:35 ` Alan Cox
2006-08-22 14:59 ` Jeremy Fitzhardinge
2006-08-22 15:12 ` Arjan van de Ven
2006-08-22 15:12 ` Arjan van de Ven
2006-08-22 15:58 ` Alan Cox
2006-08-22 15:58 ` Alan Cox
2006-08-23 1:35 ` Rusty Russell
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