From: Alex Shi <alex.shi@linux.alibaba.com>
To: Matthew Wilcox <willy@infradead.org>, Vlastimil Babka <vbabka@suse.cz>
Cc: Yu Zhao <yuzhao@google.com>,
Konstantin Khlebnikov <koct9i@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Michal Hocko <mhocko@suse.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH next] mm/swap.c: reduce lock contention in lru_cache_add
Date: Fri, 27 Nov 2020 11:14:49 +0800 [thread overview]
Message-ID: <5f8300ea-2abc-5cee-d837-f20e535f19c2@linux.alibaba.com> (raw)
In-Reply-To: <20201126155553.GT4327@casper.infradead.org>
在 2020/11/26 下午11:55, Matthew Wilcox 写道:
> On Thu, Nov 26, 2020 at 04:44:04PM +0100, Vlastimil Babka wrote:
>> However, Matthew wanted to increase pagevec size [1] and once 15^2 becomes
>> 63^2, it starts to be somewhat more worrying.
>>
>> [1] https://lore.kernel.org/linux-mm/20201105172651.2455-1-willy@infradead.org/
>
> Well, Tim wanted it ;-)
>
> I would suggest that rather than an insertion sort (or was it a bubble
> sort?), we should be using a Shell sort. It's ideal for these kinds of
> smallish arrays.
>
> https://en.wikipedia.org/wiki/Shellsort
>
Uh, looks perfect good!. I gonna look into it. :)
Thanks!
next prev parent reply other threads:[~2020-11-27 3:15 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 8:27 [PATCH next] mm/swap.c: reduce lock contention in lru_cache_add Alex Shi
2020-11-20 23:19 ` Andrew Morton
2020-11-23 4:46 ` Alex Shi
2020-11-25 15:38 ` Vlastimil Babka
2020-11-26 3:12 ` Alex Shi
2020-11-26 11:05 ` Vlastimil Babka
2020-11-26 4:52 ` Yu Zhao
2020-11-26 6:39 ` Alex Shi
2020-11-26 7:24 ` Yu Zhao
2020-11-26 8:09 ` Alex Shi
2020-11-26 11:22 ` Vlastimil Babka
2020-11-26 15:44 ` Vlastimil Babka
2020-11-26 15:55 ` Matthew Wilcox
2020-11-27 3:14 ` Alex Shi [this message]
2020-12-01 8:02 ` [PATCH 1/3] mm/swap.c: pre-sort pages in pagevec for pagevec_lru_move_fn Alex Shi
2020-12-01 8:02 ` [PATCH 2/3] mm/swap.c: bail out early for no memcg and no numa Alex Shi
2020-12-01 8:02 ` [PATCH 3/3] mm/swap.c: extend the usage to pagevec_lru_add Alex Shi
2020-12-01 8:10 ` [PATCH 1/3] mm/swap.c: pre-sort pages in pagevec for pagevec_lru_move_fn Michal Hocko
2020-12-01 8:20 ` Alex Shi
2020-12-25 9:59 ` [RFC PATCH 0/4] pre sort pages on lruvec in pagevec Alex Shi
2020-12-25 9:59 ` [RFC PATCH 1/4] mm/swap.c: pre-sort pages in pagevec for pagevec_lru_move_fn Alex Shi
2020-12-25 9:59 ` [RFC PATCH 2/4] mm/swap.c: bail out early for no memcg and no numa Alex Shi
2020-12-25 9:59 ` [RFC PATCH 3/4] mm/swap.c: extend the usage to pagevec_lru_add Alex Shi
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