linux-kernel - Re: [PATCH 00/11] mm: lru related cleanups

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Message-ID: <X9lZcn+GTOnzI6Zl@google.com>
Date:   Tue, 15 Dec 2020 17:48:50 -0700
From:   Yu Zhao <yuzhao@...gle.com>
To:     Alex Shi <alex.shi@...ux.alibaba.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Roman Gushchin <guro@...com>, Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/11] mm: lru related cleanups

On Thu, Dec 10, 2020 at 05:28:08PM +0800, Alex Shi wrote:
> Hi Yu,
> 
> btw, after this patchset, to do cacheline alignment on each of lru lists
> are possible, so did you try that to see performance changes?

I ran a Chrome-based performance benchmark without memcg and with one
memcg many times. The good news is I didn't see any regressions for
these basic cases. But I can't say how much improvements there would
be with hundreds of memcgs.