Messages in this thread | | | Date | Thu, 27 Jul 2017 07:46:34 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH tip/core/rcu 4/5] sys_membarrier: Add expedited option |
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On Thu, Jul 27, 2017 at 04:36:24PM +0200, Peter Zijlstra wrote: > On Thu, Jul 27, 2017 at 07:32:05AM -0700, Paul E. McKenney wrote: > > > as per your proposed patch, will spray IPIs to all CPUs and at high > > > rates. > > > > OK, I have updated my patch to do throttling. > > But not respect cpusets. Which is the other important point. > > The scheduler based IPIs are limited to where we are allowed to place > tasks (as are the TLB ones for that matter, for the exact same reason).
Yes, these are disadvantages, no argument there. But I will nevertheless be carrying some variant of this patch until something better exists, including that something being tested and found satisfactory by the various people asking for this.
Thanx, Paul
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