linux-kernel - Re: [-mm PATCH 4/9] Memory controller memory accounting (v4)

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Message-Id: <20070815084454.09B061BF982@siro.lan>
Date:	Wed, 15 Aug 2007 17:44:53 +0900 (JST)
From:	yamamoto@...inux.co.jp (YAMAMOTO Takashi)
To:	svaidy@...ux.vnet.ibm.com
Cc:	a.p.zijlstra@...llo.nl, dhaval@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	ebiederm@...ssion.com, containers@...ts.osdl.org,
	akpm@...ux-foundation.org, xemul@...nvz.org, menage@...gle.com,
	balbir@...ux.vnet.ibm.com
Subject: Re: [-mm PATCH 4/9] Memory controller memory accounting (v4)

> YAMAMOTO Takashi wrote:
> >> +	lock_meta_page(page);
> >> +	/*
> >> +	 * Check if somebody else beat us to allocating the meta_page
> >> +	 */
> >> +	race_mp = page_get_meta_page(page);
> >> +	if (race_mp) {
> >> +		kfree(mp);
> >> +		mp = race_mp;
> >> +		atomic_inc(&mp->ref_cnt);
> >> +		res_counter_uncharge(&mem->res, 1);
> >> +		goto done;
> >> +	}
> > 
> > i think you need css_put here.
> 
> Thats correct. We do need css_put in this path.
> 
> Thanks,
> Vaidy

v5 still seems to have the problem.

YAMAMOTO Takashi
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