linux-kernel - Re: [mmotm][PATCH] coalescing uncharge

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Message-Id: <20090902151500.532ffc2f.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 2 Sep 2009 15:15:00 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [mmotm][PATCH] coalescing uncharge

On Wed, 2 Sep 2009 13:41:14 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

>  #ifdef CONFIG_SWAP
>  /*
>   * called after __delete_from_swap_cache() and drop "page" account.
> Index: mmotm-2.6.31-Aug27/include/linux/sched.h
> ===================================================================
> --- mmotm-2.6.31-Aug27.orig/include/linux/sched.h
> +++ mmotm-2.6.31-Aug27/include/linux/sched.h
> @@ -1540,6 +1540,13 @@ struct task_struct {
>  	unsigned long trace_recursion;
>  #endif /* CONFIG_TRACING */
>  	unsigned long stack_start;
> +#ifdef CONFIG_CGROUP_MEM_RES_CTLR /* memcg uses this to do batch job */
> +	struct memcg_batch_info {
> +		bool do_batch;
> +		struct mem_cgroup *memcg;
> +		long pages, memsw;
> +	} memcg_batch;
> +#endif
I wonder I should make this as a pointer
	struct memcg_batch_info *

and allocate this dynamically at attach. Hmm. maybe useful for other purpose
to track per-task memcg behavior.

Regards,
-Kmae

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