linux-kernel - Re: [PATCH] Remove unnecessary irq disabling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <463883AA.6060605@rtr.ca>
Date:	Wed, 02 May 2007 08:27:22 -0400
From:	Mark Lord <lkml@....ca>
To:	Andi Kleen <ak@...ell.com>
Cc:	Glauber de Oliveira Costa <gcosta@...hat.com>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Remove unnecessary irq disabling

Andi Kleen wrote:
>>> What does that break, or was it already broken and this fixes it?
>> I think neither. This function is only called at early bootup,
>> (start_secondary() ), and most of its callees have interrupts off anyway.
>> But maybe we do lose something. Andi, do you have a word on this?
> 
> We need to enable them somewhere, but cpu_idle will do it in the end.
> So it should be safe to drop it. I guess keeping them disabled the whole
> time will be a little safer against potential races.
> 
> I added the patch, but might want some cooking in -mm first because this
> is always fragile code.

Okay, that would have it now match how i386 does it.

-ml
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/