On Sat, Mar 08, 2014 at 12:40:58PM +0000, Dietmar Eggemann wrote:
I don't have a strong opinion about using or not a cpu argument for setting the flags of a level (it was part of the initial proposal before we start to completely rework the build of sched_domain) Nevertheless, I see one potential concern that you can have completely different flags configuration of the same sd level of 2 cpus.
Could you elaborate a little bit further regarding the last sentence? Do you think that those completely different flags configuration would make it impossible, that the load-balance code could work at all at this sd?
So a problem with such an interfaces is that is makes it far too easy to generate completely broken domains.
You can, for two cpus in the same domain provide, different flags; such a configuration doesn't make any sense at all.
Now I see why people would like to have this; but unless we can make it robust I'd be very hesitant to go this route.