On Fri, Apr 21, 2023 at 02:03:43PM +0200, Michal Hocko wrote: > On Tue 28-02-23 17:42:43, Uladzislau Rezki wrote: > > Hello, LSF. > > > > Title: Introduce a per-cpu-vmap-cache to eliminate a vmap lock contention > > > > Description: > > Currently the vmap code is not scaled to number of CPU cores in a system > > because a global vmap space is protected by a single spinlock. Such approach > > has a clear bottleneck if many CPUs simultaneously access to one resource. > > > > In this talk i would like to describe a drawback, show some data related > > to contentions and places where those occur in a code. Apart of that i > > would like to share ideas how to eliminate it providing a few approaches > > and compare them. > > It's been some time since you brough this up. Has there been any > progress on the topic? Do you still find it important to discuss it at > LSFMM? > The idea about sequence was/is: 1) Give an overview on the proposal; 2) Submit patches to address the problem; 3) Start a discussion over lkml with people who are interested in it; 4) Send out a complete solution. -- Uladzislau Rezki
