On Mon, Nov 8, 2010 at 7:14 AM, Johannes Weiner <hannes@xxxxxxxxxxx> wrote: > For increasing and decreasing per-cpu cgroup usage counters it makes > sense to use signed types, as single per-cpu values might go negative > during updates. But this is not the case for only-ever-increasing > event counters. > > All the counters have been signed 64-bit so far, which was enough to > count events even with the sign bit wasted. > > The next patch narrows the usage counters type (on 32-bit CPUs, that > is), though, so break out the event counters and make them unsigned > words as they should have been from the start. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx> Fair enough. We already have used unsigned long in vmstat. -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href