From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Zachary Amsden <zach@vmware.com>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Virtualization Mailing List <virtualization@lists.osdl.org>,
Rusty Russell <rusty@rustcorp.com.au>,
Chris Wright <chrisw@sous-sol.org>, Avi Kivity <avi@qumranet.com>
Subject: Re: [PATCH] Add I/O hypercalls for i386 paravirt
Date: Wed, 22 Aug 2007 14:54:16 -0700 [thread overview]
Message-ID: <46CCB088.8070606@goop.org> (raw)
In-Reply-To: <46CBC842.4070100@vmware.com>
Zachary Amsden wrote:
> This patch provides hypercalls for the i386 port I/O instructions,
> which vastly helps guests which use native-style drivers. For certain
> VMI workloads, this provides a performance boost of up to 30%. We
> expect KVM and lguest to be able to achieve similar gains on I/O
> intensive workloads.
Two comments:
- I should dust off my "break up paravirt_ops" patch, and this would fit
nicely into it (I think we already discussed this)
- What happens if you *don't* want to pv some of the io instructions?
What if you have a device which is directly exposed to the guest?
J
next prev parent reply other threads:[~2007-08-22 21:54 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-22 5:23 [PATCH] Add I/O hypercalls for i386 paravirt Zachary Amsden
2007-08-22 5:23 ` Zachary Amsden
2007-08-22 5:34 ` Avi Kivity
2007-08-22 5:40 ` Zachary Amsden
2007-08-22 8:37 ` Avi Kivity
2007-08-22 16:16 ` Zachary Amsden
2007-08-22 6:25 ` Rusty Russell
2007-08-22 10:35 ` Andi Kleen
2007-08-22 9:51 ` Avi Kivity
2007-08-22 11:08 ` Andi Kleen
2007-08-22 10:23 ` Avi Kivity
2007-08-22 11:23 ` Andi Kleen
2007-08-22 12:09 ` Avi Kivity
2007-08-22 13:15 ` Andi Kleen
2007-08-22 12:32 ` Avi Kivity
2007-08-22 16:11 ` Jeff Garzik
2007-08-27 17:54 ` Benjamin Herrenschmidt
2007-08-28 6:51 ` Zachary Amsden
2007-08-28 11:18 ` Benjamin Herrenschmidt
2007-08-22 6:00 ` H. Peter Anvin
2007-08-22 6:03 ` Zachary Amsden
2007-08-24 12:20 ` Pavel Machek
2007-08-22 10:22 ` Andi Kleen
2007-08-22 16:48 ` Zachary Amsden
2007-08-22 17:59 ` Andi Kleen
2007-08-22 17:07 ` Zachary Amsden
2007-08-22 19:46 ` Andi Kleen
2007-08-22 20:43 ` Zachary Amsden
2007-08-22 22:04 ` Andi Kleen
2007-08-22 21:25 ` Alan Cox
2007-08-22 21:25 ` Alan Cox
2007-08-22 21:41 ` Zachary Amsden
2007-08-23 5:34 ` Rusty Russell
2007-08-22 21:45 ` Zachary Amsden
2007-08-22 17:34 ` Alan Cox
2007-08-22 17:34 ` Alan Cox
2007-08-22 21:54 ` Jeremy Fitzhardinge [this message]
2007-08-22 22:15 ` James Courtier-Dutton
2007-08-22 22:15 ` James Courtier-Dutton
2007-08-22 22:20 ` Chris Wright
2007-08-22 22:29 ` James Courtier-Dutton
2007-08-22 22:29 ` James Courtier-Dutton
2007-08-22 22:34 ` Chris Wright
2007-08-22 23:14 ` Jeremy Fitzhardinge
2007-08-23 0:47 ` Andi Kleen
2007-08-23 0:38 ` Jeremy Fitzhardinge
2007-08-23 2:34 ` Andi Kleen
2007-08-27 17:54 ` Benjamin Herrenschmidt
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