linux-kernel - Re: [patch 4/7 -mm] oom: badness heuristic rewrite

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Date:	Thu, 11 Feb 2010 15:37:24 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Rik van Riel <riel@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Nick Piggin <npiggin@...e.de>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Lubos Lunak <l.lunak@...e.cz>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [patch 4/7 -mm] oom: badness heuristic rewrite

On Thu, 11 Feb 2010 15:31:14 -0800 (PST)
David Rientjes <rientjes@...gle.com> wrote:

> > There _are_ things we can do though.  Detect a write to the old file and
> > emit a WARN_ON_ONCE("you suck").  Wait a year, turn it into
> > WARN_ON("you really suck").  Wait a year, then remove it.
> > 
> 
> Ok, I'll use WARN_ON_ONCE() to let the user know of the deprecation and 
> then add an entry to Documentation/feature-removal-schedule.txt.

A printk_once() would be better - WARN() generates a big stack
spew which often is wholly irrelevant.

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