On Fri, Dec 02, 2016 at 07:39:24PM +0300, Boris Zhmurov wrote:
> Paul E. McKenney Thu Dec 01 2016 - 14:39:21 EST:
>
> >> Well, I can confirm, that replacing cond_resched_rcu_qs in
> >> shrink_node_memcg by cond_resched also makes dmesg clean from RCU
> >> CPU stall warnings.
> >>
> >> I've attached patch (just modification of Paul's patch), that
> >> fixes RCU stall messages in situations, when all memory is used by
> >> couchbase/memcached + fs cache and linux starts to use swap.
>
> > Nice! Just to double-check, could you please also test your patch
> > above with these two commits from -rcu?
> >
> > d2db185bfee8 ("rcu: Remove short-term CPU kicking") f8f127e738e3
> > ("rcu: Add long-term CPU kicking")
> >
> > Thanx, Paul
>
>
> Looks like patches d2db185bfee8 and f8f127e738e3 change nothing.
>
> With cond_resched() in shrink_node_memcg and these two patches dmesg is
> clean. No any RCU CPU stall messages.
Very good! I have these two patches queued for 4.11.
And thank you again for all the testing!!!
Thanx, Paul
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>