On Fri, Jan 27, 2017 at 01:43:37PM +0530, Vinayak Menon wrote: > At the end of a window period, if the reclaimed pages > is greater than scanned, an unsigned underflow can > result in a huge pressure value and thus a critical event. > Reclaimed pages is found to go higher than scanned because > of the addition of reclaimed slab pages to reclaimed in > shrink_node without a corresponding increment to scanned > pages. Minchan Kim mentioned that this can also happen in > the case of a THP page where the scanned is 1 and reclaimed > could be 512. > > Signed-off-by: Vinayak Menon <vinmenon@xxxxxxxxxxxxxx> Acked-by: Minchan Kim <minchan@xxxxxxxxxx> Thanks for the fix up! -- 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>
