linux-kernel - Re: [PATCH 6/9] rmap: support file THP

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Message-ID: <565E096D.7000105@intel.com>
Date:	Tue, 1 Dec 2015 12:56:13 -0800
From:	Dave Hansen <dave.hansen@...el.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Hugh Dickins <hughd@...gle.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Vlastimil Babka <vbabka@...e.cz>,
	Christoph Lameter <cl@...two.org>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Jerome Marchand <jmarchan@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 6/9] rmap: support file THP

On 11/18/2015 03:25 PM, Kirill A. Shutemov wrote:
> -void page_add_file_rmap(struct page *page)
> +void page_add_file_rmap(struct page *page, bool compound)

I take it we have to pass 'compound' in explicitly because
PageCompound() could be true, but we don't want to do a compound
mapping.  This is true for those weirdo sound driver allocations and a
few other ones, right?

Or is there something else?
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