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] Re: [XCP] new version available

To: Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [XCP] new version available
From: Tom Rotenberg <tom.rotenberg@xxxxxxxxx>
Date: Thu, 21 Jan 2010 21:57:44 +0200
Cc: Markus Schuster <ml@xxxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Thu, 21 Jan 2010 11:58:53 -0800
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=YHMl2BJYA1WhfAid+XIAM4EZ3VVdjWqWyuAvtJJmlX8=; b=oy0+BU39KKtbz1jj1qSsL7qrKwXENq2VQgWOAlhiGrzor3BRUzYwABBQDZvJ6XvNLW Eygn8878SMqzD5byOSa5HTSno0NQS9es8LROCgXVofrbJgY2PcRcZVLCRSjsjmIdncDU F0m5a159HtDDqz8WoONbeRaRIAohf5A6nqFZQ=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=rH3dPaQ5e6chHw2uu+1IqROwW9AkjwvdSKjphOpuG/9Yoy75p7cizypqPdF6I9rx9c hFyUYN+zQavmsWRUFiflG1QrOaxEXRqcXXtaAlEvnbr3ebmSeeAXEeVpamRws4ix/yU1 DolVg1oU00lZrtr2T65JXHu929OugtCZRfUhs=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4FA716B1526C7C4DB0375C6DADBC4EA342A82FAB44@xxxxxxxxxxxxxxxxxxxxxxxxx>
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: <81A73678E76EA642801C8F2E4823AD2143B8C194C1@xxxxxxxxxxxxxxxxxxxxxxxxx> <201001192030.40494.ml@xxxxxxxxxxxxxxxxxxxx> <20100119193606.GF2861@xxxxxxxxxxx> <201001192039.21424.ml@xxxxxxxxxxxxxxxxxxxx> <4FA716B1526C7C4DB0375C6DADBC4EA342A82FAB44@xxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
So, the community has currently 2 sets of drivers:
* The GPL PV drivers, which are less stable, and not as good as the
XCP PV drivers (not signed by MS$, etc), but are open, and everyone
can change them fix their bugs, support extra-stuff, etc.
* The XCP PV drivers, which looks stable, and better, but are
closed-source, and u can't fix bugs there, change them for your own
use, etc.

1. Is it a good idea, to have the XCP PV drivers closed-source? If u
will open-source the XCP drivers, or at-least contribute some of their
code (which isn't blocked by MS$ stuff) to the GPL-PV, the community
will have one strong and stable PV drivers tree. It will be good for
Xen, as other companies, like Red-Hat (KVM) already released the full
source of their Windows PV drivers.

2. What is the planned policy about the XCP PV drivers?


2010/1/21 Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>:
>> > > That's cool! Is there some comparison with GPLPV drivers in case of
>> > > stability, speed, features and so on?
>> > > It looks a bit like future competition between the two driver packs?
>> >
>> > Well the major difference is that GPLPV drivers are opensource,
>> > and the Citrix Windows PV drivers provided in XCP are not.
>> Ah, I see - too bad Citrix couldn't open source them :)
> They're freely distributable in binary form, but they link against various 
> MSFT libraries which have licenses that restrict what can be done with the 
> source. The binaries pass all the MSFT class-specific WHQL tests and are 
> signed so you don't get annoying pop-ups when installing them.
> I'm not aware of any relative benchmarking having been done, but it would 
> certainly be  interesting to know.
> Ian
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

Xen-devel mailing list