Hi, On 2025-06-02 21:20:33 +0300, Yura Sokolov wrote: > But still problem of spin lock contention is here.
I still would like to see a reproducer for this. > So I propose to introduce another spin lock type capable for Exclusive and > Shared lock modes (i.e. Write/Read modes) and use it in this two places. I am vehemently opposed to that. We should work towards getting rid of spinlocks, not introduce more versions of spinlocks. Userspace spinlocks largely are a bad idea. We should instead make properly queued locks cheaper (e.g. by having an exclusive-only lock, which can be cheaper to release on common platforms). Greetings, Andres Freund
