On Wed, May 18, 2016 at 10:09:50AM +0000, Naoya Horiguchi wrote: > From c600b1ee6c36b3df6973f5365b4179c92f3c08e3 Mon Sep 17 00:00:00 2001 > From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> > Date: Wed, 18 May 2016 18:42:57 +0900 > Subject: [PATCH v2] mm: check_new_page_bad() directly returns in __PG_HWPOISON > case > > Currently we check page->flags twice for "HWPoisoned" case of > check_new_page_bad(), which can cause a race with unpoisoning. > This race unnecessarily taints kernel with "BUG: Bad page state". > check_new_page_bad() is the only caller of bad_page() which is interested > in __PG_HWPOISON, so let's move the hwpoison related code in bad_page() > to it. > > Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> -- Mel Gorman SUSE Labs -- 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>