Messages in this thread | | | Subject | Re: INFO: rcu_sched detected stalls on CPUs/tasks with `kswapd` and `mem_cgroup_shrink_node` | From | Boris Zhmurov <> | Date | Fri, 2 Dec 2016 19:39:24 +0300 |
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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.
Thanks.
-- Boris Zhmurov mailto: bb@kernelpanic.ru "wget http://kernelpanic.ru/bb_public_key.pgp -O - | gpg --import"
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