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

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Message-ID: <20160113161704.GA13146@pd.tnic>
Date:	Wed, 13 Jan 2016 17:17:04 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"Michael S. Tsirkin" <mst@...hat.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 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?

-- 
Regards/Gruss,
    Boris.

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