linux-kernel - Re: [PATCH 3/4] x86,asm: Re-work smp_store

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Message-ID: <20160113182505-mutt-send-email-mst@redhat.com>
Date:	Wed, 13 Jan 2016 18:25:21 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...capital.net>,
	Andy Lutomirski <luto@...nel.org>,
	Davidlohr Bueso <dave@...olabs.net>,
	Davidlohr Bueso <dbueso@...e.de>,
	Peter Zijlstra <peterz@...radead.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	virtualization <virtualization@...ts.linux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 3/4] x86,asm: Re-work smp_store_mb()

On Wed, Jan 13, 2016 at 05:17:04PM +0100, Borislav Petkov wrote:
> On Tue, Jan 12, 2016 at 03:24:05PM -0800, Linus Torvalds wrote:
> > But talking to the hw people about this is certainly a good idea regardless.
> 
> I'm not seeing it in this thread but I might've missed it too. Anyway,
> I'm being reminded that the ADD will change rFLAGS while MFENCE doesn't
> touch them.
> 
> Do we care?

Which flag do you refer to, exactly?

> -- 
> Regards/Gruss,
>     Boris.
> 
> ECO tip #101: Trim your mails when you reply.