Re: [RFC][PATCH -mm 6/7] memcg:make-mapping-null-before-calling-uncharge.patch

[KAMEZAWA Hiroyuki]

On Fri, 22 Aug 2008 13:57:43 +0900
Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx> wrote:

> > @@ -379,6 +377,15 @@ static void migrate_page_copy(struct pag
> >  	ClearPagePrivate(page);
> >  	set_page_private(page, 0);
> >  	page->mapping = NULL;
> You forget to remove this line :)
> 
Ouch, thanks.
-Kame

> Thanks,
> Daisuke Nishimura.
> 
> > +	/* page->mapping contains a flag for PageAnon() */
> > +	if (PageAnon(page)) {
> > +		/* This page is uncharged at try_to_unmap(). */
> > +		page->mapping = NULL;
> > +	} else {
> > +		/* Obsolete file cache should be uncharged */
> > +		page->mapping = NULL;
> > +		mem_cgroup_uncharge_cache_page(page);
> > +	}
> >  
> >  	/*
> >  	 * If any waiters have accumulated on the new page then
> > 
> 

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