xen-ia64-devel

[Top] [All Lists]

[Xen-ia64-devel] [PATCH 0/3] [RFC] clean up priv_handle_op() and paravir

from [Isaku Yamahata]

[Permanent Link][Original]

To:	xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-ia64-devel] [PATCH 0/3] [RFC] clean up priv_handle_op() and paravirtualise vdso
From:	Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Date:	Tue, 30 May 2006 12:09:40 +0900
Cc:	Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Delivery-date:	Mon, 29 May 2006 20:09:56 -0700
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxx
List-help:	<mailto:xen-ia64-devel-request@lists.xensource.com?subject=help>
List-id:	Discussion of the ia64 port of Xen <xen-ia64-devel.lists.xensource.com>
List-post:	<mailto:xen-ia64-devel@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-ia64-devel>, <mailto:xen-ia64-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-ia64-devel>, <mailto:xen-ia64-devel-request@lists.xensource.com?subject=unsubscribe>
Sender:	xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent:	Mutt/1.4.2.1i

priv_handle_op() caused some troubles.
the 1/3 patch fixes them. However it causes performance loss
because vdso area always requires priv_handle_op() and itlb reflection.
System call enterance is performance critical so that it is
worthwhile for paravirtualization.
The 3/3 patch paravirtualizes it.

There are choices to paravirtualize vdso area for transparent virtualization.
A. add running_on_xen check to gate.S directly or
B. prepare two version of gate.S, and use appropriate version at setup.
However B. requires modification to additional several files.
So My current choice is option A.

Should we go for option B?

_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[Xen-ia64-devel] [PATCH 0/3] [RFC] clean up priv_handle_op() and paravirtualise vdso, Isaku Yamahata <= Re: [Xen-ia64-devel] [PATCH 0/3] [RFC] clean up priv_handle_op() and paravirtualise vdso, Isaku Yamahata

Previous by Date:	RE: [Xen-ia64-devel] [FYI] Recipe of Booting up the latest Xen, Akio Takebe
Next by Date:	[Xen-ia64-devel] [PATCH 1/3][RFC] rewrite priv_handle_op(), Isaku Yamahata
Previous by Thread:	RE: [Xen-ia64-devel] [FYI] Recipe of Booting up the latest Xen, Tian, Kevin
Next by Thread:	Re: [Xen-ia64-devel] [PATCH 0/3] [RFC] clean up priv_handle_op() and paravirtualise vdso, Isaku Yamahata
Indexes:	[Date] [Thread] [Top] [All Lists]