linux-kernel - Re: [PATCH v2] Show kernel stack usage to /proc/meminfo and OOM log

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Message-Id: <20090703090226.08E6.A69D9226@jp.fujitsu.com>
Date:	Fri,  3 Jul 2009 09:03:15 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Christoph Lameter <cl@...ux-foundation.org>,
	David Howells <dhowells@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"tytso@....edu" <tytso@....edu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"elladan@...imo.com" <elladan@...imo.com>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"Barnes, Jesse" <jesse.barnes@...el.com>
Subject: Re: [PATCH v2] Show kernel stack usage to /proc/meminfo and OOM log

> Christoph Lameter wrote:
> > On Wed, 1 Jul 2009, David Howells wrote:
> > 
> >> KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> wrote:
> >>
> >>> +	int pages = THREAD_SIZE / PAGE_SIZE;
> >> Bad assumption.  On FRV, for example, THREAD_SIZE is 8K and PAGE_SIZE is 16K.
> > 
> > Guess that means we need arch specific accounting for this counter.
> 
> Or we count the number of stacks internally and only
> convert to pages whenever we display the value.

Thanks good idea. I'll implement this today (or tommorow).


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