On Fri, Dec 07, 2012 at 11:06:41AM +0530, Aneesh Kumar K.V wrote: ... > > From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> > > Date: Thu, 6 Dec 2012 20:54:30 -0500 > > Subject: [PATCH v2] HWPOISON, hugetlbfs: fix warning on freeing hwpoisoned > > hugepage > > > > This patch fixes the warning from __list_del_entry() which is triggered > > when a process tries to do free_huge_page() for a hwpoisoned hugepage. > > > Can you get a dump stack for that. I am confused because the page was > already in freelist, and we deleted it from the list and set the > refcount to 1. So how are we reaching free_huge_page() again ? free_huge_page() can be called for hwpoisoned hugepage from unpoison_memory(). This function gets refcount once and clears PageHWPoison, and then puts refcount twice to return the hugepage back to free pool. The second put_page() finally reaches free_huge_page(). Thanks, Naoya -- 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>