> Now we can't depend for mm_cpumask, a parallel find_linux_pte_hugepte > can happen outside that. Now i had a variant for kick_all_cpus_sync that > ignored idle cpus. But then that needs more verification. > > http://article.gmane.org/gmane.linux.ports.ppc.embedded/81105 Can be racy as a CPU moves from non-idle to idle In > + pmd_hugepage_update(vma->vm_mm, address, pmdp, ~0UL, 0); > + /* > + * This ensures that generic code that rely on IRQ disabling > + * to prevent a parallel THP split work as expected. > + */ > + kick_all_cpus_sync(); pmdp_invalidate()->pmd_hugepage_update() can still run in parallel with find_linux_pte_or_hugepte() and race.. Am I missing something? Balbir Singh -- 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>