On Tue 22-09-20 16:06:31, Yafang Shao wrote: > On Tue, Sep 22, 2020 at 3:27 PM Michal Hocko <mhocko@xxxxxxxx> wrote: [...] > > What is the latency triggered by the memory reclaim? It should be mostly > > a clean page cache right as drop_caches only drops clean pages. Or is > > this more about [id]cache? Do you have any profiles where is the time > > spent? > > > > Yes, we have analyzed the issues in the direct reclaim, but that is > not the point. Are those fixed? > The point is that each case may take us several days to analyze, while > the user can't wait, so they will use drop_caches to workaround it > until we find the solution. As I've said there are several options to achieve an immediate action. Careful resource domains configuration will certainly help with that. -- Michal Hocko SUSE Labs
