On Tue, Jul 03, 2018 at 06:34:48PM -0700, David Rientjes wrote:
> On Sun, 1 Jul 2018, Rodrigo Freire wrote:
>
> > The default page memory unit of OOM task dump events might not be
> > intuitive for the non-initiated when debugging OOM events. Add
> > a small printk prior to the task dump informing that the memory
> > units are actually memory _pages_.
> >
> > Signed-off-by: Rodrigo Freire <rfreire@xxxxxxxxxx>
> > ---
> > mm/oom_kill.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> > index 84081e7..b4d9557 100644
> > --- a/mm/oom_kill.c
> > +++ b/mm/oom_kill.c
> > @@ -392,6 +392,7 @@ static void dump_tasks(struct mem_cgroup *memcg, const nodemask_t *nodemask)
> > struct task_struct *p;
> > struct task_struct *task;
> >
> > + pr_info("Tasks state (memory values in pages):\n");
> > pr_info("[ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name\n");
> > rcu_read_lock();
> > for_each_process(p) {
>
> As the author of dump_tasks(), and having seen these values misinterpreted
> on more than one occassion, I think this is a valuable addition.
>
> Could you also expand out the "pid" field to allow for seven digits
> instead of five? I think everything else is aligned.
>
> Feel free to add
>
> Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
>
> to a v2.
>
Same here, for a v2:
Acked-by: Rafael Aquini <aquini@xxxxxxxxxx>
