On Mon, Jun 18, 2012 at 05:09:36PM +0400, Glauber Costa wrote: >On 06/18/2012 05:10 PM, Wanpeng Li wrote: >>From: Wanpeng Li <liwp@xxxxxxxxxxxxxxxxxx> >> >>move_charge_at_immigrate feature is disabled by default. Charges >>are moved only when you move mm->owner and it also add additional >>overhead. > >How big is this overhead? > >That's hardly a fast path. And if it happens to matter, it will be >just bigger when you enable it, and the compiler start giving the >wrong hints to the code. Thank you for your quick response. Oh, Maybe I should just write comments "move_charge_at_immigrate feature is disabled by default. So add "unlikely", in order to compiler can optimize." Best Regards, Wanpeng Li >-- >To unsubscribe from this list: send the line "unsubscribe cgroups" in >the body of a message to majordomo@xxxxxxxxxxxxxxx >More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>