From: Jeremy Fitzhardinge <jeremy@goop.org>
To: George Dunlap <dunlapg@umich.edu>
Cc: Muli Ben-Yehuda <MULI@il.ibm.com>,
deshantm@gmail.com, Gianluca Guida <gianluca.guida@eu.citrix.com>,
xen-devel mailing list <xen-devel@lists.xensource.com>,
Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: Re: Poor performance on HVM (kernbench)
Date: Fri, 12 Sep 2008 07:20:05 -0700 [thread overview]
Message-ID: <48CA7A95.3090605@goop.org> (raw)
In-Reply-To: <de76405a0809120419o6a05b615qc109cb3393a9937d@mail.gmail.com>
George Dunlap wrote:
> Ah, that's the problem... Linux seems to have changed the location of
> the 1:1 map. Gianluca's using an older kernel, where it's at
> 0xffff810000000000, but this trace has it at 0xffff880000000000, so
> the "guess" heuristic is missing.
>
> Jereme, is this a permanent long-term move, or is it going to be
> something random? I.e., should we just add a new heuristic "guess" at
> this address, or do we need to do something more complicated?
>
It's a permanent move. I moved it up to 0xffff880000000000 to leave
space for Xen when running as a PV kernel, but there's no reasonable way
to make it variable so the linear map will be there regardless of what
mode the kernel is operating in.
J
next prev parent reply other threads:[~2008-09-12 14:20 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-10 18:23 Poor performance on HVM (kernbench) Todd Deshane
2008-09-10 21:22 ` Todd Deshane
2008-09-10 22:42 ` Anthony Liguori
2008-09-11 2:52 ` Todd Deshane
2008-09-11 9:35 ` George Dunlap
2008-09-11 15:30 ` Todd Deshane
2008-09-11 10:00 ` Gianluca Guida
2008-09-11 15:17 ` Gianluca Guida
2008-09-11 15:25 ` Gianluca Guida
2008-09-11 15:35 ` Todd Deshane
2008-09-11 16:48 ` Gianluca Guida
2008-09-11 17:25 ` Gianluca Guida
2008-09-11 18:07 ` George Dunlap
2008-09-11 18:26 ` Gianluca Guida
2008-09-11 19:04 ` Todd Deshane
2008-09-11 19:54 ` Todd Deshane
2008-09-11 20:02 ` Jeremy Fitzhardinge
2008-09-11 20:24 ` John Levon
2008-09-12 10:41 ` Gianluca Guida
2008-09-12 11:04 ` George Dunlap
2008-09-12 11:19 ` George Dunlap
2008-09-12 14:20 ` Jeremy Fitzhardinge [this message]
2008-09-10 21:37 ` Daniel Magenheimer
2008-09-10 21:42 ` Todd Deshane
2008-09-10 21:45 ` Daniel Magenheimer
2008-09-11 2:48 ` Todd Deshane
2008-09-10 21:51 ` Steve Ofsthun
2008-09-11 2:50 ` Todd Deshane
2008-09-11 6:31 ` Pasi Kärkkäinen
2008-09-11 16:02 ` Todd Deshane
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