linux-kernel - Re: [tip:x86/asm] sched/x86_64: Don't save flags on context switch

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Message-ID: <20141103231045.GA12824@redhat.com>
Date:	Tue, 4 Nov 2014 00:10:45 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Jan Beulich <jbeulich@...e.com>, Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Sebastian Lackner <sebastian@...-team.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Chuck Ebbert <cebbert.lkml@...il.com>,
	Anish Bhatt <anish@...lsio.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/asm] sched/x86_64: Don't save flags on context switch

On 11/03, Andy Lutomirski wrote:
>
> On Mon, Nov 3, 2014 at 2:57 PM, Oleg Nesterov <oleg@...hat.com> wrote:
> >
> > I actually tried to say that irqs should be always disabled (afaics!).
> > IOW "interrupts on" should not be possible, not "interrupts off".
>
> But this is checking whether interrupts were on in the frame we're
> returning to, not whether they're on right now, right?

OOPS ;) Thanks!

Oleg.

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