Re: [PATCH next] mm/swap.c: reduce lock contention in lru_cache_add

Matthew Wilcox
2020-11-26T15:56:12Z

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.