Re: [PATCH tip/core/rcu 08/12] rcu: Force tick on for nohz_full CPUs not reaching quiescent states

2019-10-05 Thread Paul E. McKenney
On Thu, Oct 03, 2019 at 04:50:55PM +0200, Frederic Weisbecker wrote: > On Wed, Oct 02, 2019 at 06:38:59PM -0700, paul...@kernel.org wrote: > > From: "Paul E. McKenney" > > > > CPUs running for long time periods in the kernel in nohz_full mode > > might leave the scheduling-clock interrupt

Re: [PATCH tip/core/rcu 08/12] rcu: Force tick on for nohz_full CPUs not reaching quiescent states

2019-10-03 Thread Frederic Weisbecker
On Wed, Oct 02, 2019 at 06:38:59PM -0700, paul...@kernel.org wrote: > From: "Paul E. McKenney" > > CPUs running for long time periods in the kernel in nohz_full mode > might leave the scheduling-clock interrupt disabled for then full > duration of their in-kernel execution. This can (among

[PATCH tip/core/rcu 08/12] rcu: Force tick on for nohz_full CPUs not reaching quiescent states

2019-10-02 Thread paulmck
From: "Paul E. McKenney" CPUs running for long time periods in the kernel in nohz_full mode might leave the scheduling-clock interrupt disabled for then full duration of their in-kernel execution. This can (among other things) delay grace periods. This commit therefore forces the tick back on