lkml.org 
[lkml]   [2011]   [Jul]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH rcu/urgent 0/6] Fixes for RCU/scheduler/irq-threads trainwreck
On Wed, Jul 20, 2011 at 11:05:53PM +0200, Peter Zijlstra wrote:
> On Wed, 2011-07-20 at 12:29 -0700, Paul E. McKenney wrote:
>
> > Peter, does #4 (protect __rcu_read_unlock() against scheduler-using
> > irq handlers) remove the need for #5 (Add irq_{enter,exit}() to
> > scheduler_ipi()) and #6 (Inform RCU of irq_exit() activity)? My guess is
> > "no" for #5 and "yes" for #6.
>
> More or less, we want to keep #5 for it does more than just fix RCU, but
> yeah, I _think_ #4 obsoletes the direct need for #6.

Heh. So the lowest risk is keeping #6 for now and deciding later
whether we really need it.

Thanx, Paul


\
 
 \ /
  Last update: 2011-07-20 23:43    [W:0.060 / U:0.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site