linux-kernel - Re: [PATCH 0/3] fs, mm: get rid of PAGE_CACHE_* and page_cache

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Message-ID: <alpine.DEB.2.20.1603221019350.18618@east.gentwo.org>
Date:	Tue, 22 Mar 2016 10:20:09 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/3] fs, mm: get rid of PAGE_CACHE_* and page_cache_{get,release}
 macros

On Tue, 22 Mar 2016, Kirill A. Shutemov wrote:

> > Should then not PAGE_CACHE_SIZE take a page parameter and return the
> > correct page size?
>
> Why? What would you achieve by this?
>
> We already have a way to find out size of page: compoun_order() or
> hpage_nr_pages().

Ok that makes sense.