From: Blaisorblade <blaisorblade@yahoo.it>
To: user-mode-linux-devel@lists.sourceforge.net
Cc: akpm@osdl.org, Jeff Dike <jdike@addtoit.com>,
linux-kernel@vger.kernel.org, wstearns@pobox.com
Subject: Re: [uml-devel] [PATCH 2/3] UML - x86_64 thread fixes
Date: Thu, 22 Feb 2007 01:07:30 +0100 [thread overview]
Message-ID: <200702220107.30766.blaisorblade@yahoo.it> (raw)
In-Reply-To: <200702082157.l18LvVFB007602@ccure.user-mode-linux.org>
On Thursday 08 February 2007 22:57, Jeff Dike wrote:
> x86_64 needs some TLS fixes. What was missing was remembering the
> child thread id during clone and stuffing it into the child during
> each context switch.
>
> The %fs value is stored separately in the thread structure since the
> host controls what effect it has on the actual register file. The
> host also needs to store it in its own thread struct, so we need the
> value kept outside the register file.
Is there any reason for avoiding this treatment to %gs, apart that TLS code
usually does not need it, even if the API allows for it to exist? I _do_
believe this patch fixes bug which can be tested (not verified everything),
even if I wonder why you didn't look at the patch I sent to you time ago (I
hadn't finished it, in truth, but there was most stuff - it had problems I
couldn't debug at that time).
--
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale!
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next prev parent reply other threads:[~2007-02-22 0:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-08 21:57 [uml-devel] [PATCH 2/3] UML - x86_64 thread fixes Jeff Dike
2007-02-22 0:07 ` Blaisorblade [this message]
2007-02-22 16:54 ` Jeff Dike
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