On Sat, 8 Feb 2020 21:41:49 +0000 (UTC) Christopher Lameter <cl@xxxxxxxxx> wrote: > On Sat, 8 Feb 2020, Wen Yang wrote: > > > I would greatly appreciate it if you kindly give me some feedback on this > > patch. > > I think the measure is too severe given its use and the general impact on code. Severe in what way? It's really a quite simple change, although quite a few edits were needed. > Maybe avoid taking the lock or reducing the time a lock is taken when reading /proc/slabinfo is > the best approach? > > Also you could cache the value in the userspace application? Why is this > value read continually? : reading "/proc/slabinfo" can possibly block the slab allocation on : another CPU for a while, 200ms in extreme cases That was bad of us. It would be good to stop doing this.
