> +/** > + * vrange_check_purged_pte - Checks ptes for purged pages > + * > + * Iterates over the ptes in the pmd checking if they have > + * purged swap entries. > + * > + * Sets the vrange_walker.pages_purged to 1 if any were purged. > + */ > +static int vrange_check_purged_pte(pmd_t *pmd, unsigned long addr, > + unsigned long end, struct mm_walk > *walk) > +{ > + struct vrange_walker *vw = walk->private; > + pte_t *pte; > + spinlock_t *ptl; > + > + if (pmd_trans_huge(*pmd)) > + return 0; > + if (pmd_trans_unstable(pmd)) > + return 0; > + > + pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); > + for (; addr != end; pte++, addr += PAGE_SIZE) { > + if (!pte_present(*pte)) { > + swp_entry_t vrange_entry = pte_to_swp_entry(*pte); > + > + if (unlikely(is_vpurged_entry(vrange_entry))) { > + vw->page_was_purged = 1; > + break;
This function only detect there is vpurge entry or not. But VRANGE_NONVOLATILE should remove all vpurge entries. Otherwise, non-volatiled range still makes SIGBUS. > + } > + } > + } > + pte_unmap_unlock(pte - 1, ptl); > + cond_resched(); > + > + return 0; > +} -- 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/