From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 23 Nov 2018 13:56:44 +0300
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH 2/2] page cache: Store only head pages in i_pages
Message-ID: <20181123105643.fxqk7l57rdurdubx@kshutemo-mobl1>
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 <20181122213224.12793-3-willy@infradead.org>
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On Thu, Nov 22, 2018 at 01:32:24PM -0800, Matthew Wilcox wrote:
> Transparent Huge Pages are currently stored in i_pages as pointers to
> consecutive subpages.  This patch changes that to storing consecutive
> pointers to the head page in preparation for storing huge pages more
> efficiently in i_pages.

I probably miss something, I don't see how it wouldn't break
split_huge_page().

I don't see what would replace head pages in i_pages with
formerly-tail-pages?

Hm?

-- 
 Kirill A. Shutemov