linux-kernel - Re: [PATCH v9 3/5] qrwlock, x86 - Treat all data type not bigger than long as atomic in x86

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Message-ID: <20140127170931.GQ9012@linux.vnet.ibm.com>
Date:	Mon, 27 Jan 2014 09:09:31 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Waiman Long <waiman.long@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michel Lespinasse <walken@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Rik van Riel <riel@...hat.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	George Spelvin <linux@...izon.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	Scott J Norton <scott.norton@...com>
Subject: Re: [PATCH v9 3/5] qrwlock, x86 - Treat all data type not bigger
 than long as atomic in x86

On Wed, Jan 22, 2014 at 02:09:33PM +0100, Ingo Molnar wrote:
> 
> * Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > On Wed, Jan 22, 2014 at 01:09:17PM +0100, Ingo Molnar wrote:
> > > 
> > > * Peter Zijlstra <peterz@...radead.org> wrote:
> > > 
> > > > On Tue, Jan 21, 2014 at 04:31:56PM -0800, Linus Torvalds wrote:
> > > > > And if somebody tries to do a "smp_store_release()" on a random
> > > > > structure or union, do we care? We're not some nanny state that wants
> > > > > to give nice warnings for insane code.
> > > > 
> > > > Hurm, and here I thought warning on insane code was a good idea :/
> > > 
> > > There's a level of insanity that is best cured through Darwin Awards?
> > 
> > Yeah, but who will clean up after them? :-)
> 
> Birds, insects, bacteria?

In the Linux kernel, it will probably be us cleaning up after them.  ;-)

								Thanx, Paul

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