Re: 答复: 答复: [PATCH] mm: Add RWH_RMAP_EXCLUDE flag to exclude files from rmap sharing

[Matthew Wilcox]

On Fri, Apr 24, 2026 at 01:08:35AM +0000, Yibin Liu wrote:
> On an Intel Emerald Rapids server (112 cores), run the execl benchmark from
> UnixBench with the command: ./Run -c 220 execl
> Then perf top shows:
> 
>   91.53%  [kernel]                    [k] osq_lock
>    0.50%  [kernel]                    [k] rwsem_spin_on_owner

OK, but does this represent a realistic workload?  It's pretty easy to
construct workloads that hammer on particular locks; the question is
whether it's a relevant performance bottleneck that customers care about.