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Message-ID: <20190820134032.GA24642@bombadil.infradead.org>
Date:   Tue, 20 Aug 2019 06:40:32 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Alex Shi <alex.shi@...ux.alibaba.com>
Cc:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Tejun Heo <tj@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Oscar Salvador <osalvador@...e.de>,
        Wei Yang <richard.weiyang@...il.com>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Arun KS <arunks@...eaurora.org>, Qian Cai <cai@....pw>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Hugh Dickins <hughd@...gle.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        David Rientjes <rientjes@...gle.com>,
        Souptick Joarder <jrdr.linux@...il.com>,
        swkhack <swkhack@...il.com>,
        "Potyra, Stefan" <Stefan.Potyra@...ktrobit.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Colin Ian King <colin.king@...onical.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Peng Fan <peng.fan@....com>, Ira Weiny <ira.weiny@...el.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Yafang Shao <laoar.shao@...il.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>
Subject: Re: [PATCH 01/14] mm/lru: move pgdat lru_lock into lruvec

On Tue, Aug 20, 2019 at 05:48:24PM +0800, Alex Shi wrote:
> +++ b/include/linux/mmzone.h
> @@ -295,6 +295,9 @@ struct zone_reclaim_stat {
>  
>  struct lruvec {
>  	struct list_head		lists[NR_LRU_LISTS];
> +	/* move lru_lock to per lruvec for memcg */
> +	spinlock_t			lru_lock;

This comment makes no sense outside the context of this patch.

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