linux-kernel - Re: [PATCH v2] memcg: reduce lock time at move charge (Was Re: [PATCH 04/10] memcg: disable local interrupts in lock_page

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Message-Id: <20101012125613.1accc1bd.nishimura@mxp.nes.nec.co.jp>
Date:	Tue, 12 Oct 2010 12:56:13 +0900
From:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Greg Thelen <gthelen@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, containers@...ts.osdl.org,
	Andrea Righi <arighi@...eler.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
Subject: Re: [PATCH v2] memcg: reduce lock time at move charge (Was Re:
 [PATCH 04/10] memcg: disable local interrupts in lock_page_cgroup()

> +err_out:
> +	for (; mt < info + num; mt++)
> +		if (mt->type == MC_TARGET_PAGE) {
> +			putback_lru_page(mt->val.page);
Is this putback_lru_page() necessary ?
is_target_pte_for_mc() doesn't isolate the page.

Thanks,
Daisuke Nishimura.


> +			put_page(mt->val.page);
> +		}
> +	goto out;
>  }
>  
>  static void mem_cgroup_move_charge(struct mm_struct *mm)
> 
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