Hello, Kamezawa. On Tue, Nov 20, 2012 at 04:05:51PM +0900, Kamezawa Hiroyuki wrote: > BTW, css's ID was limited to 65535 to be encoded in 2bytes. > If we use INT, this will increase size of swap_cgroup. > (2bytes per page => 4bytes per page) It's preallocated at swapon() > because allocating memory dynamically when we swap a memory is not good. > > Do we really need 4bytes for ID ? If so, swap_cgroup should be totally > re-designed.
That's a memcg restriction which shouldn't have been imposed on cgroup core from the beginning. What memcg should do is rejecting to become online from ->css_onilne() if cgrp->id is out of the range it can handle. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
