linux-kernel - Re: [RFC][PATCH] Improving directed yield scalability for PLE handler

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: <1347308360.2124.59.camel@twins>
Date:	Mon, 10 Sep 2012 22:19:20 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	habanero@...ux.vnet.ibm.com
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Ingo Molnar <mingo@...hat.com>, Rik van Riel <riel@...hat.com>,
	KVM <kvm@...r.kernel.org>, chegu vinod <chegu_vinod@...com>,
	LKML <linux-kernel@...r.kernel.org>, X86 <x86@...nel.org>,
	Gleb Natapov <gleb@...hat.com>,
	Srivatsa Vaddagiri <srivatsa.vaddagiri@...il.com>
Subject: Re: [RFC][PATCH] Improving directed yield scalability for PLE
 handler

On Mon, 2012-09-10 at 15:12 -0500, Andrew Theurer wrote:
> +       /*
> +        * if the target task is not running, then only yield if the
> +        * current task is in guest mode
> +        */
> +       if (!(p_rq->curr->flags & PF_VCPU))
> +               goto out_irq; 

This would make yield_to() only ever work on KVM, not that I mind this
too much, its a horrid thing and making it less useful for (ab)use is a
good thing, still this probably wants mention somewhere :-)
--
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/