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From:   Alex Shi <alex.shi@linux.alibaba.com>
To:     willy@infradead.org
Cc:     tim.c.chen@linux.intel.com,
        Konstantin Khlebnikov <koct9i@gmail.com>,
        Hugh Dickins <hughd@google.com>, Yu Zhao <yuzhao@google.com>,
        Michal Hocko <mhocko@suse.com>,
        Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: [RFC PATCH 0/4] pre sort pages on lruvec in pagevec
Date:   Fri, 25 Dec 2020 17:59:46 +0800
Message-Id: <1608890390-64305-1-git-send-email-alex.shi@linux.alibaba.com>
In-Reply-To: <20201126155553.GT4327@casper.infradead.org>
References: <20201126155553.GT4327@casper.infradead.org>
Precedence: bulk

This idea was tried on per memcg lru lock patchset v18, and had a good
result, about 5%~20+% performance gain on lru lock busy benchmarks,
like case-lru-file-readtwice.

But on the latest kernel, I can not reproduce the result on my box.
Also I can not reproduce Tim's performance gain too on my box.

So I don't know if it's workable in some scenario, just sent out if
someone has interesting...

Alex Shi (4):
  mm/swap.c: pre-sort pages in pagevec for pagevec_lru_move_fn
  mm/swap.c: bail out early for no memcg and no numa
  mm/swap.c: extend the usage to pagevec_lru_add
  mm/swap.c: no sort if all page's lruvec are same

Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org

 mm/swap.c | 118 +++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 91 insertions(+), 27 deletions(-)

-- 
2.29.GIT