On Wed, Apr 28, 2010 at 09:13:45AM +0900, KAMEZAWA Hiroyuki wrote: > Doing some check in move_ptes() after vma_adjust() is not safe. > IOW, when vma's information and information in page-table is incosistent...objrmap > is broken and migartion will cause panic. > > Then...I think there are 2 ways. > 1. use seqcounter in "mm_struct" as previous patch and lock it at mremap. > or > 2. get_user_pages_fast() when do remap. 3 take the anon_vma->lock -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>