Re: [PATCH] memcg: Add memory.pressure_level events

[Greg Thelen <gthelen@google.com>]

On Tue, Feb 12 2013, Anton Vorontsov wrote:

> Hi Greg,
>
> Thanks for taking a look!
>
> On Tue, Feb 12, 2013 at 10:42:51PM -0800, Greg Thelen wrote:
> [...]
>> > +static bool vmpressure_event(struct vmpressure *vmpr,
>> > +			     unsigned long s, unsigned long r)
>> > +{
>> > +	struct vmpressure_event *ev;
>> > +	int level = vmpressure_calc_level(vmpressure_win, s, r);
>> > +	bool signalled = 0;
>> s/bool/int/
>
> Um... I surely can do this, but why do you think it is a good idea?

Because you incremented signalled below.  Incrementing a bool seems
strange.  A better fix would be to leave this a bool and
s/signaled++/signaled = true/ below.

>> > +
>> > +	mutex_lock(&vmpr->events_lock);
>> > +
>> > +	list_for_each_entry(ev, &vmpr->events, node) {
>> > +		if (level >= ev->level) {
>> > +			eventfd_signal(ev->efd, 1);
>> > +			signalled++;
>> > +		}
>> > +	}
>> > +
>> > +	mutex_unlock(&vmpr->events_lock);
>> > +
>> > +	return signalled;

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>