This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-devel] [PATCH][RFC] making "xm dump-core" paralell

To: Rikiya Ayukawa <ayukawa.rikiya@xxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH][RFC] making "xm dump-core" paralell
From: John Levon <levon@xxxxxxxxxxxxxxxxx>
Date: Thu, 27 Sep 2007 15:26:15 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>, SUZUKI Kazuhiro <kaz@xxxxxxxxxxxxxx>
Delivery-date: Thu, 27 Sep 2007 07:27:19 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <46FB6B87.4000204@xxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <46FB6B87.4000204@xxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.9i
On Thu, Sep 27, 2007 at 05:36:23PM +0900, Rikiya Ayukawa wrote:

> # Sorry, I mistook the function name on e-mail.
> # xc_domain_dump() -> xc_domain_dumpcore()
> > - Add xc_dumpcore program. This program only calls xc_domain_dump()
> > >   in libxc to dump the core image of a domainU.
> >   
> >
> > Why?
> To make xend call indirectly xc_domain_dumpcore() written by C.
> I think this is similar to xc_save and xc_restore programs.
> xend (cset#15880:a00cc97b392a) calls xc_domain_dumpcore() directly.
> It takes xend a lot of time to finish this C function.
> Until the xend's thread finishes xc_domain_dumpcore(), any other xend's
> thread
> don't run because of GIL (global interpreter lock) in CPython specification.
> http://docs.python.org/api/threads.html

But if you're forking, why can't you do it in Python?


Xen-devel mailing list