Re: [Patch] New zone ZONE_EASY_RECLAIM take 4. (disable gfp_easy_reclaim bit)[5/8]

Yasunori Goto
2006-01-05T11:00:41Z

> On (05/01/06 14:43), Yasunori Goto didst pronounce:
> > >
> > > > ===================================================================
> > > > --- zone_reclaim.orig/fs/pipe.c 2005-12-16 18:36:20.000000000 +0900
> > > > +++ zone_reclaim/fs/pipe.c 2005-12-16 19:15:35.000000000 +0900
> > > > @@ -284,7 +284,7 @@ pipe_writev(struct file *filp, const str
> > > > int error;
> > > >
> > > > if (!page) {
> > > > - page = alloc_page(GFP_HIGHUSER);
> > > > + page = alloc_page(GFP_HIGHUSER & ~__GFP_EASY_RECLAIM);
> > > > if (unlikely(!page)) {
> > > > ret = ret ? : -ENOMEM;
> > > > break;
> > >
> > > That is a bit hard to understand. How about a new GFP_HIGHUSER_HARD or
> > > somesuch define back in patch 1, then use it here?
> >
> > It looks better. Thanks for your idea.
> >
>
> There are other places where GFP_HIGHUSER is used for pages that are not easily
> reclaimed. It is easier clearer to add __GFP_EASY_RECLAIM at the places you
> know pages are easily reclaimed rather than removing __GFP_EASY_RECLAIM from
> awkward places.

I thought that other pages can be migrated by Chlistoph-san's (and
Kame-san's) patch. May I ask which page should be no EASY_RECLAIM?
Am I overlooking anything?

Thanks.