linux-kernel - Re: [RFC PATCH 1/5] mm: memcg: make memcg huge page split support any order split.

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Message-ID: <YjjX/bZrUmQfFjHC@casper.infradead.org>
Date:   Mon, 21 Mar 2022 19:54:37 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Zi Yan <ziy@...dia.com>
Cc:     Roman Gushchin <roman.gushchin@...ux.dev>, linux-mm@...ck.org,
        Shuah Khan <shuah@...nel.org>, Yang Shi <shy828301@...il.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Hugh Dickins <hughd@...gle.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [RFC PATCH 1/5] mm: memcg: make memcg huge page split support
 any order split.

On Mon, Mar 21, 2022 at 03:07:46PM -0400, Zi Yan wrote:
> Yes. Will change it to new_nr to be consistent.

uh, you're going to call ilog2?

I think this would look less inconsistent if 'nr' were an unsigned long
(how long until we need 16GB pages?  Think PPC already supports those)