lkml.org 
[lkml]   [2020]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] mm, oom: prevent soft lockup on memcg oom for UP systems
On Wed, 11 Mar 2020, Tetsuo Handa wrote:

> > diff --git a/mm/vmscan.c b/mm/vmscan.c
> > --- a/mm/vmscan.c
> > +++ b/mm/vmscan.c
> > @@ -2637,6 +2637,8 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
> > unsigned long reclaimed;
> > unsigned long scanned;
> >
> > + cond_resched();
> > +
>
> Is this safe for CONFIG_PREEMPTION case? If current thread has realtime priority,
> can we guarantee that the OOM victim (well, the OOM reaper kernel thread rather
> than the OOM victim ?) gets scheduled?
>

I think it's the best we can do that immediately solves the issue unless
you have another idea in mind?

> > switch (mem_cgroup_protected(target_memcg, memcg)) {
> > case MEMCG_PROT_MIN:
> > /*
> >
>

\
 
 \ /
  Last update: 2020-03-10 23:56    [W:0.126 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site