On Fri, 7 Dec 2012 10:49:57 -0500 Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> wrote: > 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. This changelog is very short. In fact it is too short, resulting in others having to ask questions about the patch. When this happens, please treat it as a sign that the changelog needs additional information - so that other readers will not feel a need to ask the same questions! I added this paragraph: : 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(). Also, is the description accurate? Is the __list_del_entry() warning the only problem? Or is it the case that this bug will cause memory corruption? If so then the patch is pretty important and is probably needed in -stable as well? I haven't checked how far back in time the bug exists. -- 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>