linux-kernel - Re: [patch 13/13] mm: memcontrol: rewrite uncharge API

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Message-ID: <CAJfpegs-k5QC+42SzLKUSaHrdPxWBaT_dF+SOPqoDvg8h5p_Tw@mail.gmail.com>
Date:	Wed, 23 Jul 2014 20:08:57 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Michal Hocko <mhocko@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>, Tejun Heo <tj@...nel.org>,
	Vladimir Davydov <vdavydov@...allels.com>, linux-mm@...ck.org,
	cgroups@...r.kernel.org,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [patch 13/13] mm: memcontrol: rewrite uncharge API

On Wed, Jul 23, 2014 at 5:06 PM, Johannes Weiner <hannes@...xchg.org> wrote:
> Can the new page be anything else than previous page cache?

It could be an ordinary pipe buffer too.  Stealable as well (see
generic_pipe_buf_steal()).

Thanks,
Miklos
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