On Wed, Apr 20, 2011 at 2:40 PM, TAO HU <tghk48@xxxxxxxxxxxx> wrote: > Hi, Minchan Kim > > Thanks for your analysis and suggestion! > > I'm not familiar with COMPACTION. It's rather recent new feature of mm. > Does it work with ARM? Logically, It doesn't depends on architecture. But I am not sure because ARM's ugly pfn_valid hole in sparsemem. (I don't remember it well but there was some issue at that time) I guess if you use FLATMEM, it works well. If you have a trouble, please report it. > Does it require specific MMU configuration? Notice that it depends on > HUGETLB_PAGE > It doesn't depends on hugetlb. It is fixed [33a938774fdb: mm: compaction: don't depend on HUGETLB_PAGE] recently. You can backport it. Thanks. -- 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 internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>