On Thu, Jan 18, 2024 at 06:42:35PM +0000, Shakeel Butt wrote: > One of our workloads (Postgres 14) has regressed when migrated from 5.10 > to 6.1 upstream kernel. The regression can be reproduced by sysbench's > oltp_write_only benchmark. It seems like the always on rstat flush in > mem_cgroup_wb_stats() is causing the regression. So, rate limit that > specific rstat flush. One potential consequence would be the dirty > throttling might be decided on stale memcg stats. However from our > benchmarks and production traffic we have not observed any change in the > dirty throttling behavior of the application. > > Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx> Acked-by: Roman Gushchin <roman.gushchin@xxxxxxxxx> Thanks!
