linux-kernel - Re: [PATCH v2 2/5] sched, numa: Document usages of mm->numa_scan

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Message-ID: <1430429197.2475.55.camel@j-VirtualBox>
Date:	Thu, 30 Apr 2015 14:26:37 -0700
From:	Jason Low <jason.low2@...com>
To:	Davidlohr Bueso <dave@...olabs.net>
Cc:	Waiman Long <waiman.long@...com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>, jason.low2@...com
Subject: Re: [PATCH v2 2/5] sched, numa: Document usages of mm->numa_scan_seq

On Thu, 2015-04-30 at 11:54 -0700, Davidlohr Bueso wrote:

> I also wonder why this patch is included in a set called
> "sched, timer: Improve scalability of itimers" ;)

Good point  :)

The reason these first 2 patches were included in this patchset is
because patch 3 depended on patch 1 (particularly due to the
modifications to posix_cpu_timers_init_group() which happen to use
ACCESS_ONCE after initializing the thread_group_cputimer lock). Likewise
patch 2 depended on patch 1. Thus, I included these changes to make
applying these patches a bit simpler.

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