On Thu, Aug 1, 2019 at 11:31 AM Suren Baghdasaryan <sur...@google.com> wrote: > > On Thu, Aug 1, 2019 at 10:49 AM Johannes Weiner <han...@cmpxchg.org> wrote: > > > > On Thu, Aug 01, 2019 at 01:13:49PM +0200, Peter Zijlstra wrote: > > > PSI defaults to a FIFO-99 thread, reduce this to FIFO-1.
nit: above "PSI defaults" is more accurately "PSI polling defaults". The core PSI thread that handles regular updates is a regular kthread. > > > > > > FIFO-99 is the very highest priority available to SCHED_FIFO and > > > it not a suitable default; it would indicate the psi work is the > > > most important work on the machine. > > > > > > Since Real-Time tasks will have pre-allocated memory and locked it in > > > place, Real-Time tasks do not care about PSI. All it needs is to be > > > above OTHER. > > > > > > Cc: Suren Baghdasaryan <sur...@google.com> > > > Cc: Johannes Weiner <han...@cmpxchg.org> > > > Cc: Thomas Gleixner <t...@linutronix.de> > > > Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> > > > > Acked-by: Johannes Weiner <han...@cmpxchg.org> > > > > Subject should be s/pci/psi/ > > Thanks for the patch. Please give me a couple hours for testing to > ensure no regressions before merging it. Tested-by: Suren Baghdasaryan <sur...@google.com>
