[lkml]   [2011]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: linux-next 20111025: warnings in rcu_idle_exit_common()/rcu_idle_enter_common()
On Wed, Nov 02, 2011 at 10:56:26AM -0400, Steven Rostedt wrote:
> On Wed, 2011-11-02 at 07:44 -0700, Paul E. McKenney wrote:
> > rcu: Fix idle-task checks
> >
> > RCU has traditionally relied on idle_cpu() to determine whether a given
> > CPU is running in the context of an idle task, but recent changes have
> > invalidated this approach.
> Correct. idle_cpu() returns if the CPU is idle or not, not if the CPU is
> running the idle thread. If the CPU wakes up on the idle thread and
> there's tasks on the run queue, then idle_cpu() will return false, even
> though the task running is the idle thread. But the CPU itself is not
> technically idle.
> Acked-by: Steven Rostedt <>

Thank you, Steven! I have added your Acked-by.

Thanx, Paul

 \ /
  Last update: 2011-11-02 16:21    [W:0.070 / U:6.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site