On Tue, Dec 11, 2012 at 08:18:27PM +0800, Xishi Qiu wrote: > 1) move poisoned page check at the beginning of the function. > 2) add page_lock to avoid unpoison clear the flag. That doesn't make sense, obviously you would need to recheck inside the lock again to really protect against unpoison. But unpoison is only for debugging anyways, so it doesn't matter if the count is 100% correct. -Andi -- 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>