On 2012/12/11 10:58, Andi Kleen wrote: >> That sounds like overkill. There are not so many free pages in a >> typical server system. > > As Fengguang said -- memory error handling is tricky. Lots of things > could be done in theory, but they all have a cost in testing and > maintenance. > > In general they are only worth doing if the situation is common and > represents a significant percentage of the total pages of a relevant server > workload. > > -Andi > Hi Andi and Fengguang, "There are not so many free pages in a typical server system", sorry I don't quite understand it. buffered_rmqueue() prep_new_page() check_new_page() bad_page() If we alloc 2^10 pages and one of them is a poisoned page, then the whole 4M memory will be dropped. Thanks, Xishi Qiu -- 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>