Hello, Daniel. On Thu, Feb 20, 2020 at 02:55:35PM -0500, Daniel Jordan wrote: > On Thu, Feb 20, 2020 at 01:45:45PM -0500, Tejun Heo wrote: > > The setup cost can be lazy optimized but it'd still have to bounce the > > tiny pieces of work to different threads instead of processing them in > > one fell swoop from the same context, which most likely is gonna be > > untenably expensive. > > I see, your last mail is clearer now. If it's easy to do, a pointer to where > this happens would help so we're on the same page. Network packet rx is the clearest example I think, but you already mentioned it. Reclaim is less so but when kswapd reclaims, it walks everybody, and there can be a lot of small cgroups. Thanks. -- tejun
