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Date: Wed, 5 Mar 2014 15:54:20 +0100
From: Oleg Nesterov <oleg@redhat.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Thomas Gleixner <tglx@linutronix.de>, Khalid Aziz <khalid.aziz@oracle.com>,
        One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
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        peterz@infradead.org, akpm@linux-foundation.org,
        viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org
Subject: Re: [RFC] [PATCH] Pre-emption control for userspace
Message-ID: <20140305145420.GA30173@redhat.com>
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On 03/04, Andi Kleen wrote:
>
> Anything else?

Well, we have yield_to(). Perhaps sys_yield_to(lock_owner) can help.
Or perhaps sys_futex() can do this if it knows the owner. Don't ask
me what exactly I mean though ;)

Oleg.