Re: [PATCH 00/13] mm, swap: rework of swap allocator locks

[Andrew Morton]

On Wed, 23 Oct 2024 03:24:38 +0800 Kairui Song <ryncsn@xxxxxxxxx> wrote:

> After this series, lock contention on si->lock is nearly unobservable
> with `perf lock` with the same test above :
> 
>   contended   total wait     max wait     avg wait         type   caller
>   ... snip ...
>          91    204.62 us      4.51 us      2.25 us     spinlock   cluster_move+0x2e
>   ... snip ...
>          47    125.62 us      4.47 us      2.67 us     spinlock   cluster_move+0x2e
>   ... snip ...
>          23     63.15 us      3.95 us      2.74 us     spinlock   cluster_move+0x2e
>   ... snip ...
>          17     41.26 us      4.58 us      2.43 us     spinlock   cluster_isolate_lock+0x1d
>   ... snip ...

Were any overall runtime benefits observed?