On 2022-05-22 01:22:00 [+0200], Stefan Wahren wrote: > Hi, Hi, > while testing the staging/vc04_services/interface/vchiq_arm driver with my > Raspberry Pi 3 B+ (multi_v7_defconfig) i noticed a huge performance > regression since [ff042f4a9b050895a42cae893cc01fa2ca81b95c] mm: > lru_cache_disable: replace work queue synchronization with synchronize_rcu > > Usually i run "vchiq_test -f 1" to see the driver is still working [1]. What about https://lore.kernel.org/all/YmrWK%2FKoU1zrAxPI@xxxxxxxxxxx/ Sebastian
