linux-kernel - Re: [PATCH] x86: Fix thermal throttling reporting after kexec

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: <alpine.DEB.2.11.1510011413151.4500@nanos>
Date:	Thu, 1 Oct 2015 14:15:54 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andi Kleen <andi@...stfloor.org>
cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] x86: Fix thermal throttling reporting after kexec

On Thu, 24 Sep 2015, Andi Kleen wrote:
> The per CPU thermal vector init code checks if the thermal
> vector is already installed and complains and bails out if
> it is.
> 
> This happens after kexec, as kernel shut down does
> not clear the thermal vector APIC register.

So the obvious question is, why don't we do that.

> Just remove the check. I checked the code and there's
> no valid code paths where the thermal init code for a CPU
> could be called multiple times.

I'm not against removing that check as it does not really add value,
but we still should clear the APIC register at shut down, right?

Thanks,

	tglx
--
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/