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] update for x86_64-put-note-sections-into-a-pt_note-segme

To: "Ian Campbell" <ian.campbell@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] update for x86_64-put-note-sections-into-a-pt_note-segment-in-vmlinux.patch
From: "Jan Beulich" <jbeulich@xxxxxxxxxx>
Date: Mon, 11 Sep 2006 08:47:59 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Mon, 11 Sep 2006 00:47:40 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <1157831978.4659.8.camel@insmouth>
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: <44F3088B.76E4.0078.0@xxxxxxxxxx> <1157831978.4659.8.camel@insmouth>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>>> Ian Campbell <ian.campbell@xxxxxxxxxxxxx> 09.09.06 21:59 >>>
>On Mon, 2006-08-28 at 14:15 +0100, Jan Beulich wrote:
>> Older binutils (prior to 2.16) have a problem with the linker script 
>> resulting
>> from the change introducing explicit segment maps. Namely does the
>> respective linker not properly handle @nobits sections (i.e. .bss) sitting
>> between @progbits ones (i.e. .data.*). The .bss section must therefore
>> be moved past all initialized sections (as is already the case on i386).
>> Replacement patch attached.
>I've applied this now. Sorry for the delay, it slipped off my radar...
>I'm a little wary of the problem described here
>http://marc.theaimsgroup.com/?l=linux-kernel&m=115629369729911&w=2 but I
>was unable to reproduce it and for now it seems preferable to not
>working at all with older binutils.

I discussed this at some length with Andi Kleen (as I'm of the opinion that if 
patch introduced a problem like this, then the problem was likely just hidden
before). Since we have so little data about the problem, we'd need to see this
again in order to analyze it more thoroughly; I would have wanted it to be put
back in even in the native kernel for this purpose, but Andi wanted to at least
delay doing so until we (internally) have a wider test window again than at this
point in time.
Therefore, should anyone run into any problems because of this change, I
would very much appreciate being explicitly notified about that.


Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>