Message-ID: <1340985857.28750.100.camel@twins>
Subject: Re: [PATCH 09/40] autonuma: introduce kthread_bind_node()
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, Hillf Danton <dhillf@gmail.com>,
        Dan Smith <danms@us.ibm.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
        Paul Turner <pjt@google.com>,
        Suresh Siddha <suresh.b.siddha@intel.com>,
        Mike Galbraith <efault@gmx.de>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Lai Jiangshan <laijs@cn.fujitsu.com>,
        Bharata B Rao <bharata.rao@gmail.com>,
        Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
        Christoph Lameter <cl@linux.com>, Alex Shi <alex.shi@intel.com>,
        Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Don Morris <don.morris@hp.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri, 29 Jun 2012 18:04:17 +0200
In-Reply-To: <4FEDCB7A.1060007@redhat.com>
References: <1340888180-15355-1-git-send-email-aarcange@redhat.com>
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	 <4FEDCB7A.1060007@redhat.com>
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On Fri, 2012-06-29 at 11:36 -0400, Rik van Riel wrote:
> On 06/28/2012 08:55 AM, Andrea Arcangeli wrote:
> 
> > --- a/include/linux/sched.h
> > +++ b/include/linux/sched.h
> > @@ -1792,7 +1792,7 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *
> >   #define PF_SWAPWRITE	0x00800000	/* Allowed to write to swap */
> >   #define PF_SPREAD_PAGE	0x01000000	/* Spread page cache over cpuset */
> >   #define PF_SPREAD_SLAB	0x02000000	/* Spread some slab caches over cpuset */
> > -#define PF_THREAD_BOUND	0x04000000	/* Thread bound to specific cpu */
> > +#define PF_THREAD_BOUND	0x04000000	/* Thread bound to specific cpus */
> >   #define PF_MCE_EARLY    0x08000000      /* Early kill for mce process policy */
> >   #define PF_MEMPOLICY	0x10000000	/* Non-default NUMA mempolicy */
> >   #define PF_MUTEX_TESTER	0x20000000	/* Thread belongs to the rt mutex tester */
> 
> Changing the semantics of PF_THREAD_BOUND without so much as
> a comment in your changelog or buy-in from the scheduler
> maintainers is a big no-no.

In fact I've already said a number of times this patch isn't going
anywhere.


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