LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Andi Kleen <ak@suse.de>
To: virtualization@lists.osdl.org
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
	Chris Wright <chrisw@sous-sol.org>,
	xen-devel@lists.xensource.com,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [patch 17/24] Xen-paravirt_ops: avoid having a bad selector in %gs during context switch
Date: Wed, 21 Feb 2007 23:10:02 +0100	[thread overview]
Message-ID: <200702212310.02218.ak@suse.de> (raw)
In-Reply-To: <20070221205323.770169136@goop.org>


>  	/*
> +	 * Temporary hack: zero gs now that we've saved it so that Xen
> +	 * doesn't try to reload the old value after changing the GDT
> +	 * during the context switch.  This can go away once Xen has
> +	 * been taught to only reload %gs when it absolutely must.
> +	 */
> +	loadsegment(gs, 0);

Sorry, but i don't really want that unconditionally in the context switch.
Adding a paravirt ops for it would be also ugly. Can Xen be fixed?

-Andi

       reply	other threads:[~2007-02-21 22:10 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20070221205254.169835700@goop.org>
     [not found] ` <20070221205323.770169136@goop.org>
2007-02-21 22:10   ` Andi Kleen [this message]
2007-02-21 22:14     ` Jeremy Fitzhardinge
2007-02-21 22:16     ` Keir Fraser
2007-02-21 23:25     ` [Xen-devel] " Zachary Amsden
2007-02-21 23:29       ` Jeremy Fitzhardinge
     [not found] ` <20070221205322.869165491@goop.org>
2007-02-21 22:15   ` [patch 05/24] Xen-paravirt_ops: Add pagetable accessors to pack and unpack pagetable entries Andi Kleen
2007-02-21 22:20     ` Jeremy Fitzhardinge
2007-02-21 23:20     ` Rusty Russell
2007-02-21 23:27       ` [Xen-devel] " Jeremy Fitzhardinge
     [not found] ` <20070221205323.842917348@goop.org>
2007-02-22  3:10   ` [patch 18/24] Xen-paravirt_ops: Some generic early printk & boot console fixups Andrew Morton
2007-02-22  5:48     ` Jeremy Fitzhardinge
2007-02-22  8:33       ` Gerd Hoffmann

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200702212310.02218.ak@suse.de \
    --to=ak@suse.de \
    --cc=akpm@linux-foundation.org \
    --cc=chrisw@sous-sol.org \
    --cc=jeremy@goop.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=virtualization@lists.osdl.org \
    --cc=xen-devel@lists.xensource.com \
    --subject='Re: [patch 17/24] Xen-paravirt_ops: avoid having a bad selector in %gs during context switch' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).