Re: [PATCH tip/core/rcu 03/12] rcu: Force on tick when invoking lots of callbacks

2019-10-05 Thread Paul E. McKenney
On Thu, Oct 03, 2019 at 04:10:52PM +0200, Frederic Weisbecker wrote: > On Wed, Oct 02, 2019 at 06:38:54PM -0700, paul...@kernel.org wrote: > > From: "Paul E. McKenney" > > > > Callback invocation can run for a significant time period, and within > > CONFIG_NO_HZ_FULL=y kernels, this period will

Re: [PATCH tip/core/rcu 03/12] rcu: Force on tick when invoking lots of callbacks

2019-10-03 Thread Frederic Weisbecker
On Wed, Oct 02, 2019 at 06:38:54PM -0700, paul...@kernel.org wrote: > From: "Paul E. McKenney" > > Callback invocation can run for a significant time period, and within > CONFIG_NO_HZ_FULL=y kernels, this period will be devoid of scheduler-clock > interrupts. In-kernel execution without such

[PATCH tip/core/rcu 03/12] rcu: Force on tick when invoking lots of callbacks

2019-10-02 Thread paulmck
From: "Paul E. McKenney" Callback invocation can run for a significant time period, and within CONFIG_NO_HZ_FULL=y kernels, this period will be devoid of scheduler-clock interrupts. In-kernel execution without such interrupts can cause all manner of malfunction, with RCU CPU stall warnings