On Wed, Apr 28, 2010 at 05:45:08PM +0200, Andrea Arcangeli wrote: > On Wed, Apr 28, 2010 at 04:23:54PM +0100, Mel Gorman wrote: > > Is it possible to delay the linkage like that? As arguments get copied into > > the temporary stack before it gets moved, I'd have expected the normal fault > > path to prepare and attach the anon_vma. We could special case it but > > that isn't very palatable either. > > I'm not sure what is more palatable, but I feel it should be fixed in > execve. Ok the best idea so far I had is to add a fake temporary fake vma to the anon_vma list with the old vm_start and same vm_pgoff before shifting down vma->vm_start and calling move_page_tables. Then after the move is complete we remove the fake vma. So all the fast paths will remain unmodified and no magic is required. I'll try to fix this for the old stable anon-vma code and test in aa.git first as the code will differ. If it works ok anybody can port it to new anon-vma code. -- 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>