On Mon, Feb 20, 2012 at 04:10:40PM -0500, Dean Nelson wrote: > Andrea Arcangeli pointed out to me that a check in __memory_failure() which > was intended to prevent THP tail pages from being checked for the absence > of the PG_lru flag (something that is always the case), was also preventing > THP head pages from being checked. > > A THP head page could actually benefit from the call to shake_page() by > ending up being put back to a LRU, provided it had been waiting in a > pagevec array. > > Andrea suggested that the "!PageTransCompound(p)" in the if-statement > should be replaced by a "!PageTransTail(p)", thus allowing THP head pages > to be checked and possibly shaken. > > Signed-off-by: Dean Nelson <dnelson@xxxxxxxxxx> Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>