On Mon, 16 Aug 2021 17:17:50 -0700 Mike Kravetz <mike.kravetz@xxxxxxxxxx> wrote: > > > > And how does one know the operation has completed so the sysfs files > > can be reloaded for another operation? > > > > When the write to the file is complete, the operation has completed. > Not exactly sure what you mean by reloading the sysfs files for > another operation? If userspace wishes to perform another demote operation, it must wait for the preceding one to complete. Presumably if thread A is blocked in a write to `demote' and thread B concurrently tries to perform a demotion, thread B will be blocked as well? Was this tested? Lots of things are to be added to changelogs & documentation, methinks.
