On Fri, Mar 18, 2011 at 02:34:03PM -0700, Hugh Dickins wrote: > On Fri, 18 Mar 2011, Andrea Arcangeli wrote: > > On Mon, Mar 14, 2011 at 10:30:11AM -0700, Linus Torvalds wrote: > > Subject: mm: PageBuddy and mapcount robustness > > > > From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > > > Change the _mapcount value indicating PageBuddy from -2 to -128 for > > more robusteness against page_mapcount() undeflows. > > > > Use reset_page_mapcount instead of __ClearPageBuddy in bad_page to > > ignore the previous retval of PageBuddy(). > > > > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > Reported-by: Hugh Dickins <hughd@xxxxxxxxxx> > > Yes, this version satisfies my objections too. > I'd say Acked-by but I see that it's already in, great. > > I've Cc'ed stable@xxxxxxxxxx: please can we have this in 2.6.38.1, > since 2.6.38 regressed the recovery from bad page states, > inadvertently changing them to a fatal error when CONFIG_DEBUG_VM. Now queued up for 2.6.38.2, thanks. greg k-h -- 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>