linux-kernel - Re: [RFC][PATCH] fix swap entries is not reclaimed in proper way for mem+swap controller

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Message-Id: <20090424133306.0d9fb2ce.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 24 Apr 2009 13:33:06 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
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>,
	"hugh@...itas.com" <hugh@...itas.com>
Subject: Re: [RFC][PATCH] fix swap entries is not reclaimed in proper way
 for mem+swap controller

On Wed, 22 Apr 2009 14:38:33 +0900
Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote:

> >  #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
> >  extern void mem_cgroup_uncharge_swap(swp_entry_t ent);
> > +extern void mem_cgroup_mark_swapcache_stale(struct page *page);
> > +extern void mem_cgroup_fixup_swapcache(struct page *page);
> >  #else
> >  static inline void mem_cgroup_uncharge_swap(swp_entry_t ent)
> >  {
> >  }
> > +static void mem_cgroup_check_mark_swapcache_stale(struct page *page)
> > +{
> > +}
> > +static void mem_cgroup_fixup_swapcache(struct page *page)
> > +{
> > +}
> >  #endif
> >  
> I think they should be defined in MEM_RES_CTLR case.
> Exhausting swap entries problem is not depend on MEM_RES_CTLR_SWAP.
> 
Could you explain this more ? I can't understand.


Thanks,
-Kame

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