From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@muc.de>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, virtualization@lists.osdl.org,
xen-devel@lists.xensource.com, Chris Wright <chrisw@sous-sol.org>,
Ian Pratt <ian.pratt@xensource.com>,
Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Subject: Re: [patch 13/21] Xen-paravirt: Add nosegneg capability to the vsyscall page notes
Date: Tue, 13 Feb 2007 14:49:10 -0800 [thread overview]
Message-ID: <45D24066.4070109@goop.org> (raw)
In-Reply-To: <45D23F97.5040907@vmware.com>
Zachary Amsden wrote:
> I don't like this because now a kernel compiled with both CONFIG_XEN
> and CONFIG_VMI has "nosegneg" turned on. We don't actually require
> this for performance or correctness, so it would be nice to be able to
> dynamically turn it off instead of having it forced.
Any suggestions about how to do this? It seems hard to have a note
dynamically appear and disappear in the vsyscall.so.
I wasn't terribly concerned about this, since there is effectively zero
performance difference between the two library implementations.
J
WARNING: multiple messages have this Message-ID (diff)
From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Zachary Amsden <zach@vmware.com>
Cc: Andrew Morton <akpm@osdl.org>,
xen-devel@lists.xensource.com,
Ian Pratt <ian.pratt@xensource.com>,
virtualization@lists.osdl.org, linux-kernel@vger.kernel.org,
Chris Wright <chrisw@sous-sol.org>, Andi Kleen <ak@muc.de>,
Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Subject: Re: [patch 13/21] Xen-paravirt: Add nosegneg capability to the vsyscall page notes
Date: Tue, 13 Feb 2007 14:49:10 -0800 [thread overview]
Message-ID: <45D24066.4070109@goop.org> (raw)
In-Reply-To: <45D23F97.5040907@vmware.com>
Zachary Amsden wrote:
> I don't like this because now a kernel compiled with both CONFIG_XEN
> and CONFIG_VMI has "nosegneg" turned on. We don't actually require
> this for performance or correctness, so it would be nice to be able to
> dynamically turn it off instead of having it forced.
Any suggestions about how to do this? It seems hard to have a note
dynamically appear and disappear in the vsyscall.so.
I wasn't terribly concerned about this, since there is effectively zero
performance difference between the two library implementations.
J
next prev parent reply other threads:[~2007-02-13 22:49 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-13 22:17 [patch 00/21] Xen-paravirt: Xen guest implementation for paravirt_ops interface Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 01/21] Xen-paravirt: Fix typo in sync_constant_test_bit()s name Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 02/21] Xen-paravirt: Handle a zero-sized VT console Jeremy Fitzhardinge
2007-02-14 9:24 ` Gerd Hoffmann
2007-02-14 9:24 ` Gerd Hoffmann
2007-02-13 22:17 ` [patch 03/21] Xen-paravirt: Add pagetable accessors to pack and unpack pagetable entries Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 04/21] Xen-paravirt: paravirt_ops: hooks to set up initial pagetable Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 05/21] Xen-paravirt: paravirt_ops: allocate a fixmap slot Jeremy Fitzhardinge
2007-02-14 1:23 ` Dan Hecht
2007-02-14 1:36 ` Jeremy Fitzhardinge
2007-02-14 1:36 ` Jeremy Fitzhardinge
2007-02-14 2:34 ` Dan Hecht
2007-02-14 8:43 ` Gerd Hoffmann
2007-02-14 8:37 ` [Xen-devel] " Jan Beulich
2007-02-14 8:37 ` Jan Beulich
2007-02-14 9:15 ` [Xen-devel] " Andi Kleen
2007-02-14 9:15 ` Andi Kleen
2007-02-13 22:17 ` [patch 06/21] Xen-paravirt: remove ctor for pgd cache Jeremy Fitzhardinge
2007-02-13 22:39 ` Zachary Amsden
2007-02-13 22:17 ` [patch 07/21] Xen-paravirt: Allow paravirt backend to choose kernel PMD sharing Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 08/21] Xen-paravirt: Allow paravirt backend to select PGD allocation alignment Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 09/21] Xen-paravirt: add hooks to intercept mm creation and destruction Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 10/21] Xen-paravirt: Name: dont export paravirt_ops structure, do individual functions Jeremy Fitzhardinge
2007-02-14 1:06 ` Zachary Amsden
2007-02-14 1:06 ` Zachary Amsden
2007-02-14 1:16 ` Jeremy Fitzhardinge
2007-02-14 1:16 ` Jeremy Fitzhardinge
2007-02-14 1:18 ` Zachary Amsden
2007-02-14 1:18 ` Zachary Amsden
2007-02-14 1:37 ` Jeremy Fitzhardinge
2007-02-14 1:37 ` Jeremy Fitzhardinge
2007-02-14 1:43 ` Zachary Amsden
2007-02-14 1:43 ` Zachary Amsden
2007-02-14 1:44 ` Jeremy Fitzhardinge
2007-02-14 1:44 ` Jeremy Fitzhardinge
2007-02-14 5:51 ` Rusty Russell
2007-02-14 5:51 ` Rusty Russell
2007-02-14 19:36 ` Christoph Hellwig
2007-02-13 22:17 ` [patch 11/21] Xen-paravirt: Add apply_to_page_range() which applies a function to a pte range Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 12/21] Xen-paravirt: Allocate and free vmalloc areas Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 13/21] Xen-paravirt: Add nosegneg capability to the vsyscall page notes Jeremy Fitzhardinge
2007-02-13 22:45 ` Zachary Amsden
2007-02-13 22:45 ` Zachary Amsden
2007-02-13 22:49 ` Jeremy Fitzhardinge [this message]
2007-02-13 22:49 ` Jeremy Fitzhardinge
2007-02-13 22:54 ` Zachary Amsden
2007-02-13 22:54 ` Zachary Amsden
2007-02-13 23:13 ` Jeremy Fitzhardinge
2007-02-13 23:13 ` Jeremy Fitzhardinge
2007-02-14 5:38 ` [Xen-devel] " Rusty Russell
2007-02-14 5:38 ` Rusty Russell
2007-02-13 22:17 ` [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options Jeremy Fitzhardinge
2007-02-13 22:53 ` Dan Hecht
2007-02-13 22:53 ` Dan Hecht
2007-02-13 23:29 ` Jeremy Fitzhardinge
2007-02-13 23:29 ` Jeremy Fitzhardinge
2007-02-13 23:58 ` [Xen-devel] " Zachary Amsden
2007-02-13 23:58 ` Zachary Amsden
2007-02-13 23:58 ` Dan Hecht
2007-02-13 22:17 ` [patch 15/21] Xen-paravirt: Add Xen interface header files Jeremy Fitzhardinge
2007-02-14 20:45 ` Eric W. Biederman
2007-02-14 20:45 ` Eric W. Biederman
2007-02-15 0:10 ` Jeremy Fitzhardinge
2007-02-15 0:10 ` Jeremy Fitzhardinge
2007-02-15 17:32 ` Christoph Hellwig
2007-02-13 22:17 ` [patch 16/21] Xen-paravirt: Add code into head.S to handle being booted by Xen Jeremy Fitzhardinge
2007-02-13 23:54 ` Andi Kleen
2007-02-14 0:39 ` Jeremy Fitzhardinge
2007-02-14 0:39 ` Jeremy Fitzhardinge
2007-02-14 8:56 ` [Xen-devel] " Jan Beulich
2007-02-14 8:56 ` Jan Beulich
2007-02-14 18:53 ` Jeremy Fitzhardinge
2007-02-14 18:53 ` Jeremy Fitzhardinge
2007-02-14 20:10 ` Eric W. Biederman
2007-02-14 20:10 ` Eric W. Biederman
2007-02-14 20:41 ` Jeremy Fitzhardinge
2007-02-14 20:41 ` Jeremy Fitzhardinge
2007-02-14 21:06 ` Eric W. Biederman
2007-02-14 21:06 ` Eric W. Biederman
2007-02-15 0:13 ` Jeremy Fitzhardinge
2007-02-15 0:13 ` Jeremy Fitzhardinge
2007-02-15 1:39 ` Eric W. Biederman
2007-02-15 1:39 ` Eric W. Biederman
2007-02-15 1:52 ` Jeremy Fitzhardinge
2007-02-15 1:52 ` Jeremy Fitzhardinge
2007-02-15 2:18 ` Eric W. Biederman
2007-02-15 2:18 ` Eric W. Biederman
2007-02-15 2:23 ` Jeremy Fitzhardinge
2007-02-15 2:23 ` Jeremy Fitzhardinge
2007-02-15 2:41 ` Eric W. Biederman
2007-02-15 2:41 ` Eric W. Biederman
2007-02-14 20:33 ` Eric W. Biederman
2007-02-14 20:33 ` Eric W. Biederman
2007-02-14 20:42 ` Jeremy Fitzhardinge
2007-02-14 20:42 ` Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 17/21] Xen-paravirt: Add the Xen virtual console driver Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 18/21] Xen-paravirt: Add Xen grant table support Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 19/21] Xen-paravirt: Add the Xenbus sysfs and virtual device hotplug driver Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 20/21] Xen-paravirt: Add Xen virtual block device driver Jeremy Fitzhardinge
2007-02-13 22:17 ` [patch 21/21] Xen-paravirt: Add the Xen virtual network " Jeremy Fitzhardinge
2007-02-14 20:40 ` Eric W. Biederman
2007-02-14 20:40 ` Eric W. Biederman
2007-02-16 2:24 [patch 00/21] Xen-paravirt: Xen guest implementation for paravirt_ops interface Jeremy Fitzhardinge
2007-02-16 2:25 ` [patch 13/21] Xen-paravirt: Add nosegneg capability to the vsyscall page notes Jeremy Fitzhardinge
2007-02-16 2:25 ` Jeremy Fitzhardinge
2007-02-16 6:06 ` Zachary Amsden
2007-02-16 6:06 ` Zachary Amsden
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