On Mon, Jul 28, 2014 at 04:02:31PM -0700, David Rientjes wrote: > On Mon, 28 Jul 2014, Naoya Horiguchi wrote: > > > We have a race condition between move_pages() and freeing hugepages, > > where move_pages() calls follow_page(FOLL_GET) for hugepages internally > > and tries to get its refcount without preventing concurrent freeing. > > This race crashes the kernel, so this patch fixes it by moving FOLL_GET > > code for hugepages into follow_huge_pmd() with taking the page table lock. > > > > What about CONFIG_ARCH_WANT_GENERAL_HUGETLB=n configs?
Ah yes, I need cover them. So I'll add some wrapper to do this locking in common hugetlb code. Thanks, Naoya Horiguchi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
