xen-devel

[Top] [All Lists]

Re: [Xen-devel] Memory Sharing

from [Tim Deegan]

[Permanent Link][Original]

To:	Lakshitha Harshan <harshan.dll@xxxxxxxxx>
Subject:	Re: [Xen-devel] Memory Sharing
From:	Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Date:	Tue, 26 Jul 2011 10:51:48 +0100
Cc:	xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date:	Tue, 26 Jul 2011 02:52:46 -0700
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to:	<CAH-yA4TdWn6dFf=CSpXe16r5PW+otbqBph6_um_NWHGv4_LLDw@xxxxxxxxxxxxxx>
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/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References:	<CAH-yA4TdWn6dFf=CSpXe16r5PW+otbqBph6_um_NWHGv4_LLDw@xxxxxxxxxxxxxx>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent:	Mutt/1.5.21 (2010-09-15)

Hi, 

At 13:03 +0530 on 26 Jul (1311685428), Lakshitha Harshan wrote:
> I'm doing a research project related to memory sharing. In my project I'm
> trying to share the memory pages in kernel code segments. These kernels are
> identical.
> I have carried out some experiments to analyze these memory pages. Results
> concluded that no modifications occurs on these memory pages at runtime.
> 
> But after sharing these pages using nominate and share functions, 5 memory
> pages calls unshare() operation just after sharing the code pages.
> 
> So my question is, if no modifications occurs at runtime, how could be
> possible to call "unshare()"?

Have you tried tracing the callers of the function to find out what they
are?  The WARN() macro is handy for that - it prints a complete
backtrace of the hypervisor call chain. 

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[Xen-devel] Memory Sharing, Lakshitha Harshan Re: [Xen-devel] Memory Sharing, Tim Deegan <=

Previous by Date:	Re: [Xen-devel] improving VNC performance, Pasi Kärkkäinen
Next by Date:	Re: [Xen-devel] improving VNC performance, Jean Guyader
Previous by Thread:	[Xen-devel] Memory Sharing, Lakshitha Harshan
Indexes:	[Date] [Thread] [Top] [All Lists]