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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Andi Kleen <ak@suse.de>
Cc: Arkadiusz Miskiewicz <arekm@maven.pl>, linux-kernel@vger.kernel.org
Subject: Re: proxy_pda was Re: What was in the x86 merge for .20
Date: Fri, 08 Dec 2006 13:09:42 -0800	[thread overview]
Message-ID: <4579D496.6080201@goop.org> (raw)
In-Reply-To: <200612082206.20409.ak@suse.de>

Andi Kleen wrote:
> Looking at Arkadiusz' output file it looks like gcc 4.2 decided to CSE the
> address :/
>
> 	movl	$_proxy_pda+8, %edx	#, tmp65
>
> Very sad, but legitimate.
>   

Yes, that was my conclusion too.  Though in this case the code could be
cleaned up by cutting down on the number of uses of "current" - but
that's hardly a general fix.

> The only workaround I can think of would be to define it as a symbol
> (or away in vmlinux.lds.S)

Yes.  I was thinking about setting it in vmlinux.lds to some obviously
bad address so that any access will be highly visible.

> . Or do away with the idea of proxy_pda
> again.
>   

That would be very sad indeed.

    J

  reply	other threads:[~2006-12-08 21:09 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-08  3:01 Andi Kleen
2006-12-08 10:08 ` Andrew Morton
2006-12-08 10:44   ` Ingo Molnar
2006-12-08 16:41   ` Siddha, Suresh B
2006-12-08 17:10     ` Andi Kleen
2006-12-08 18:00       ` Siddha, Suresh B
2006-12-08 20:15         ` [discuss] " Andi Kleen
2006-12-09  8:41         ` Andrew Morton
2006-12-09 18:51           ` Andi Kleen
2006-12-08 17:12   ` Andi Kleen
2006-12-08 12:04 ` Arkadiusz Miskiewicz
2006-12-08 12:51   ` Muli Ben-Yehuda
2006-12-08 13:03     ` Arkadiusz Miskiewicz
2006-12-08 16:34       ` Muli Ben-Yehuda
2006-12-08 18:04       ` Andi Kleen
2006-12-08 18:10         ` Arkadiusz Miskiewicz
2006-12-08 20:07           ` Andi Kleen
2006-12-08 20:36             ` Jeremy Fitzhardinge
2006-12-08 20:35   ` Jeremy Fitzhardinge
2006-12-08 21:06     ` proxy_pda was " Andi Kleen
2006-12-08 21:09       ` Jeremy Fitzhardinge [this message]
2006-12-08 21:22         ` Andi Kleen
2006-12-08 21:34           ` Jeremy Fitzhardinge
2006-12-08 22:04           ` Arkadiusz Miskiewicz
2007-01-15 20:41 Paweł Sikora

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