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Date: Wed, 15 Feb 2012 20:47:57 +0000
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Arjan van de Ven <arjan@infradead.org>,
        Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH] hrtimers: Special-case zero length sleeps
Message-ID: <20120215204757.GA30275@srcf.ucam.org>
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On Wed, Feb 15, 2012 at 09:46:27PM +0100, Thomas Gleixner wrote:

> Dammit, we cannot come up with a reasonable definition for special
> casing that stuff simply because you cannot draw a clear boundary what
> to special case and what not. And there is no sensible definition for
> what to do - return right away or go through schedule() or what ever.
> 
> sleep(0) is as pointless as sched_yield() and it's about time that we
> stop to create a fucking mess in the kernel just because user space
> programmers refuse to understand how an operating system works and how
> proper programming should be done.

Ok. I'll work on finding how prevelant it is and see if we can kill it 
off in userspace.

-- 
Matthew Garrett | mjg59@srcf.ucam.org
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