diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mprotect.c | 10 | ||||
| -rw-r--r-- | mm/page_alloc.c | 94 |
2 files changed, 80 insertions, 24 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index a5bf31c27375..acfe7c8d72fc 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -47,19 +47,17 @@ static void change_pte_range(struct mm_struct *mm, pmd_t *pmd, if (pte_present(oldpte)) { pte_t ptent; - /* Avoid an SMP race with hardware updated dirty/clean - * bits by wiping the pte and then setting the new pte - * into place. - */ - ptent = ptep_get_and_clear(mm, addr, pte); + ptent = ptep_modify_prot_start(mm, addr, pte); ptent = pte_modify(ptent, newprot); + /* * Avoid taking write faults for pages we know to be * dirty. */ if (dirty_accountable && pte_dirty(ptent)) ptent = pte_mkwrite(ptent); - set_pte_at(mm, addr, pte, ptent); + + ptep_modify_prot_commit(mm, addr, pte, ptent); #ifdef CONFIG_MIGRATION } else if (!pte_file(oldpte)) { swp_entry_t entry = pte_to_swp_entry(oldpte); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f32fae3121f0..f024b9b3a2a6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2929,6 +2929,18 @@ void __init free_bootmem_with_active_regions(int nid, } } +void __init work_with_active_regions(int nid, work_fn_t work_fn, void *data) +{ + int i; + int ret; + + for_each_active_range_index_in_nid(i, nid) { + ret = work_fn(early_node_map[i].start_pfn, + early_node_map[i].end_pfn, data); + if (ret) + break; + } +} /** * sparse_memory_present_with_active_regions - Call memory_present for each active range * @nid: The node to call memory_present for. If MAX_NUMNODES, all nodes will be used. @@ -3461,6 +3473,11 @@ void __paginginit free_area_init_node(int nid, struct pglist_data *pgdat, calculate_node_totalpages(pgdat, zones_size, zholes_size); alloc_node_mem_map(pgdat); +#ifdef CONFIG_FLAT_NODE_MEM_MAP + printk(KERN_DEBUG "free_area_init_node: node %d, pgdat %08lx, node_mem_map %08lx\n", + nid, (unsigned long)pgdat, + (unsigned long)pgdat->node_mem_map); +#endif free_area_init_core(pgdat, zones_size, zholes_size); } @@ -3503,7 +3520,7 @@ void __init add_active_range(unsigned int nid, unsigned long start_pfn, { int i; - printk(KERN_DEBUG "Entering add_active_range(%d, %lu, %lu) " + printk(KERN_DEBUG "Entering add_active_range(%d, %#lx, %#lx) " "%d entries of %d used\n", nid, start_pfn, end_pfn, nr_nodemap_entries, MAX_ACTIVE_REGIONS); @@ -3547,27 +3564,68 @@ void __init add_active_range(unsigned int nid, unsigned long start_pfn, } /** - * shrink_active_range - Shrink an existing registered range of PFNs + * remove_active_range - Shrink an existing registered range of PFNs * @nid: The node id the range is on that should be shrunk - * @old_end_pfn: The old end PFN of the range - * @new_end_pfn: The new PFN of the range + * @start_pfn: The new PFN of the range + * @end_pfn: The new PFN of the range * * i386 with NUMA use alloc_remap() to store a node_mem_map on a local node. - * The map is kept at the end physical page range that has already been - * registered with add_active_range(). This function allows an arch to shrink - * an existing registered range. + * The map is kept near the end physical page range that has already been + * registered. This function allows an arch to shrink an existing registered + * range. */ -void __init shrink_active_range(unsigned int nid, unsigned long old_end_pfn, - unsigned long new_end_pfn) +void __init remove_active_range(unsigned int nid, unsigned long start_pfn, + unsigned long end_pfn) { - int i; + int i, j; + int removed = 0; + + printk(KERN_DEBUG "remove_active_range (%d, %lu, %lu)\n", + nid, start_pfn, end_pfn); /* Find the old active region end and shrink */ - for_each_active_range_index_in_nid(i, nid) - if (early_node_map[i].end_pfn == old_end_pfn) { - early_node_map[i].end_pfn = new_end_pfn; - break; + for_each_active_range_index_in_nid(i, nid) { + if (early_node_map[i].start_pfn >= start_pfn && + early_node_map[i].end_pfn <= end_pfn) { + /* clear it */ + early_node_map[i].start_pfn = 0; + early_node_map[i].end_pfn = 0; + removed = 1; + continue; + } + if (early_node_map[i].start_pfn < start_pfn && + early_node_map[i].end_pfn > start_pfn) { + unsigned long temp_end_pfn = early_node_map[i].end_pfn; + early_node_map[i].end_pfn = start_pfn; + if (temp_end_pfn > end_pfn) + add_active_range(nid, end_pfn, temp_end_pfn); + continue; } + if (early_node_map[i].start_pfn >= start_pfn && + early_node_map[i].end_pfn > end_pfn && + early_node_map[i].start_pfn < end_pfn) { + early_node_map[i].start_pfn = end_pfn; + continue; + } + } + + if (!removed) + return; + + /* remove the blank ones */ + for (i = nr_nodemap_entries - 1; i > 0; i--) { + if (early_node_map[i].nid != nid) + continue; + if (early_node_map[i].end_pfn) + continue; + /* we found it, get rid of it */ + for (j = i; j < nr_nodemap_entries - 1; j++) + memcpy(&early_node_map[j], &early_node_map[j+1], + sizeof(early_node_map[j])); + j = nr_nodemap_entries - 1; + memset(&early_node_map[j], 0, sizeof(early_node_map[j])); + nr_nodemap_entries--; + } } /** @@ -3611,7 +3669,7 @@ static void __init sort_node_map(void) } /* Find the lowest pfn for a node */ -unsigned long __init find_min_pfn_for_node(unsigned long nid) +unsigned long __init find_min_pfn_for_node(int nid) { int i; unsigned long min_pfn = ULONG_MAX; @@ -3622,7 +3680,7 @@ unsigned long __init find_min_pfn_for_node(unsigned long nid) if (min_pfn == ULONG_MAX) { printk(KERN_WARNING - "Could not find start_pfn for node %lu\n", nid); + "Could not find start_pfn for node %d\n", nid); return 0; } @@ -3878,7 +3936,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn) for (i = 0; i < MAX_NR_ZONES; i++) { if (i == ZONE_MOVABLE) continue; - printk(" %-8s %8lu -> %8lu\n", + printk(" %-8s %0#10lx -> %0#10lx\n", zone_names[i], arch_zone_lowest_possible_pfn[i], arch_zone_highest_possible_pfn[i]); @@ -3894,7 +3952,7 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn) /* Print out the early_node_map[] */ printk("early_node_map[%d] active PFN ranges\n", nr_nodemap_entries); for (i = 0; i < nr_nodemap_entries; i++) - printk(" %3d: %8lu -> %8lu\n", early_node_map[i].nid, + printk(" %3d: %0#10lx -> %0#10lx\n", early_node_map[i].nid, early_node_map[i].start_pfn, early_node_map[i].end_pfn); |
