xen-devel

[Top] [All Lists]

Re: [Xen-devel] Event from dom0

from [Wei Liu]

[Permanent Link][Original]

To:	"Jinesh M.K" <mkjinesh@xxxxxxxxx>
Subject:	Re: [Xen-devel] Event from dom0
From:	Wei Liu <liuw@xxxxxxxxx>
Date:	Thu, 18 Aug 2011 09:33:49 +0800
Cc:	Xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date:	Wed, 17 Aug 2011 18:34:37 -0700
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to:	<CAKx7_gyEoX2vpxwbohhuy28tt=6FftgUJjzLhpsBgj-GgqR0FQ@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:	<CAKx7_gyEoX2vpxwbohhuy28tt=6FftgUJjzLhpsBgj-GgqR0FQ@xxxxxxxxxxxxxx>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx

On Wed, Aug 17, 2011 at 12:52 PM, Jinesh M.K <mkjinesh@xxxxxxxxx> wrote:
> Hi,
>
> How to capture a event(eg:file copying) from dom0?
>

Well, there is a technique called "system call intercepting".

File copying or any other kinds of operation need the help from the
kernel -- that is, they will issue syscalls. If you can intercept
syscall in Xen, then Xen can tell your little daemon in Dom0 what's
happening in DomU.

It is doable, because my colleage has done something similar before.
However, this kind of operation slows down the whole system, because
it requires virtual machine introspection to eliminate semantic gap
between Dom0 and DomU, and the frequent switching from Xen, Dom0 and
DomU is certainly a performance hit.

Or you can try Pasi's way, depending on your need.

Wei.

_______________________________________________
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] Event from dom0, Jinesh M.K Re: [Xen-devel] Event from dom0, Pasi Kärkkäinen Re: [Xen-devel] Event from dom0, Jinesh M.K Re: [Xen-devel] Event from dom0, Pasi Kärkkäinen Re: [Xen-devel] Event from dom0, Wei Liu <= Re: [Xen-devel] Event from dom0, Jinesh M.K Re: [Xen-devel] Event from dom0, Wei Liu

Previous by Date:	RE: [Xen-devel] [bug] 'VT-d 1G super page' feature is blocked, Kay, Allen M
Next by Date:	[Xen-devel] maximum numer of guest per host, jbuy0710
Previous by Thread:	Re: [Xen-devel] Event from dom0, Pasi Kärkkäinen
Next by Thread:	Re: [Xen-devel] Event from dom0, Jinesh M.K
Indexes:	[Date] [Thread] [Top] [All Lists]