diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 33 |
1 files changed, 12 insertions, 21 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index aaec7758eec3..e2e8014fb755 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -104,7 +104,7 @@ void put_online_mems(void) } -static void mem_hotplug_begin(void) +void mem_hotplug_begin(void) { mem_hotplug.active_writer = current; @@ -119,7 +119,7 @@ static void mem_hotplug_begin(void) } } -static void mem_hotplug_done(void) +void mem_hotplug_done(void) { mem_hotplug.active_writer = NULL; mutex_unlock(&mem_hotplug.lock); @@ -959,6 +959,7 @@ static void node_states_set_node(int node, struct memory_notify *arg) } +/* Must be protected by mem_hotplug_begin() */ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_type) { unsigned long flags; @@ -969,7 +970,6 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ int ret; struct memory_notify arg; - mem_hotplug_begin(); /* * This doesn't need a lock to do pfn_to_page(). * The section can't be removed here because of the @@ -977,21 +977,20 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ */ zone = page_zone(pfn_to_page(pfn)); - ret = -EINVAL; if ((zone_idx(zone) > ZONE_NORMAL || online_type == MMOP_ONLINE_MOVABLE) && !can_online_high_movable(zone)) - goto out; + return -EINVAL; if (online_type == MMOP_ONLINE_KERNEL && zone_idx(zone) == ZONE_MOVABLE) { if (move_pfn_range_left(zone - 1, zone, pfn, pfn + nr_pages)) - goto out; + return -EINVAL; } if (online_type == MMOP_ONLINE_MOVABLE && zone_idx(zone) == ZONE_MOVABLE - 1) { if (move_pfn_range_right(zone, zone + 1, pfn, pfn + nr_pages)) - goto out; + return -EINVAL; } /* Previous code may changed the zone of the pfn range */ @@ -1007,7 +1006,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ ret = notifier_to_errno(ret); if (ret) { memory_notify(MEM_CANCEL_ONLINE, &arg); - goto out; + return ret; } /* * If this zone is not populated, then it is not in zonelist. @@ -1031,7 +1030,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ (((unsigned long long) pfn + nr_pages) << PAGE_SHIFT) - 1); memory_notify(MEM_CANCEL_ONLINE, &arg); - goto out; + return ret; } zone->present_pages += onlined_pages; @@ -1061,9 +1060,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ if (onlined_pages) memory_notify(MEM_ONLINE, &arg); -out: - mem_hotplug_done(); - return ret; + return 0; } #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ @@ -1688,21 +1685,18 @@ static int __ref __offline_pages(unsigned long start_pfn, if (!test_pages_in_a_zone(start_pfn, end_pfn)) return -EINVAL; - mem_hotplug_begin(); - zone = page_zone(pfn_to_page(start_pfn)); node = zone_to_nid(zone); nr_pages = end_pfn - start_pfn; - ret = -EINVAL; if (zone_idx(zone) <= ZONE_NORMAL && !can_offline_normal(zone, nr_pages)) - goto out; + return -EINVAL; /* set above range as isolated */ ret = start_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE, true); if (ret) - goto out; + return ret; arg.start_pfn = start_pfn; arg.nr_pages = nr_pages; @@ -1795,7 +1789,6 @@ repeat: writeback_set_ratelimit(); memory_notify(MEM_OFFLINE, &arg); - mem_hotplug_done(); return 0; failed_removal: @@ -1805,12 +1798,10 @@ failed_removal: memory_notify(MEM_CANCEL_OFFLINE, &arg); /* pushback to free area */ undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE); - -out: - mem_hotplug_done(); return ret; } +/* Must be protected by mem_hotplug_begin() */ int offline_pages(unsigned long start_pfn, unsigned long nr_pages) { return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ); |