linux-kernel - Re: [PATCH v2] mm/huge_memory.c: reorder operations in __split_huge_page

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Message-ID: <20180211200928.GA4680@bombadil.infradead.org>
Date:   Sun, 11 Feb 2018 12:09:28 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Michal Hocko <mhocko@...e.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Nicholas Piggin <npiggin@...il.com>
Subject: Re: [PATCH v2] mm/huge_memory.c: reorder operations in
 __split_huge_page_tail()

On Sun, Feb 11, 2018 at 05:29:37PM +0300, Konstantin Khlebnikov wrote:
> +	/*
> +	 * Finally unfreeze refcount. Additional pin to radix tree.
> +	 */
> +	page_ref_unfreeze(page_tail, 1 + (!PageAnon(head) ||
> +					  PageSwapCache(head)));

Please say "Additional pin from page cache", not "radix tree".