On Thu, Aug 06, 2015 at 03:45:31PM -0500, Christoph Lameter wrote: > On Thu, 6 Aug 2015, Hugh Dickins wrote: > > > > I know a patchset which solves this! ;) > > > > Oh, and I know a patchset which avoids these problems completely, > > by not using compound pages at all ;) > > Another dumb idea: Stop the insanity of splitting pages on the fly? > Splitting pages should work like page migration: Lock everything down and > ensure no one is using the page and then do it. That way the compound pages > and its metadata are as stable as a regular page. That's what I do in refcounting patchset. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>