diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 11 | ||||
| -rw-r--r-- | mm/memory-failure.c | 2 | ||||
| -rw-r--r-- | mm/memory_hotplug.c | 31 | ||||
| -rw-r--r-- | mm/process_vm_access.c | 2 |
4 files changed, 27 insertions, 19 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e43f4ffb0..2edfa1eb9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5805,16 +5805,17 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp, swap_buffers: /* Swap primary and spare array */ thresholds->spare = thresholds->primary; - /* If all events are unregistered, free the spare array */ - if (!new) { - kfree(thresholds->spare); - thresholds->spare = NULL; - } rcu_assign_pointer(thresholds->primary, new); /* To be sure that nobody uses thresholds */ synchronize_rcu(); + + /* If all events are unregistered, free the spare array */ + if (!new) { + kfree(thresholds->spare); + thresholds->spare = NULL; + } unlock: mutex_unlock(&memcg->thresholds_lock); } diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 8dd58702b..efb399f3e 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1472,7 +1472,7 @@ static int get_any_page(struct page *page, unsigned long pfn, int flags) * Did it turn free? */ ret = __get_any_page(page, pfn, 0); - if (!PageLRU(page)) { + if (ret == 1 && !PageLRU(page)) { /* Drop page reference which is from __get_any_page() */ put_page(page); pr_info("soft_offline: %#lx: unknown non LRU page type %lx\n", diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index acf416407..6e53762de 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1209,23 +1209,30 @@ int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages) */ static int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn) { - unsigned long pfn; + unsigned long pfn, sec_end_pfn; struct zone *zone = NULL; struct page *page; int i; - for (pfn = start_pfn; + for (pfn = start_pfn, sec_end_pfn = SECTION_ALIGN_UP(start_pfn); pfn < end_pfn; - pfn += MAX_ORDER_NR_PAGES) { - i = 0; - /* This is just a CONFIG_HOLES_IN_ZONE check.*/ - while ((i < MAX_ORDER_NR_PAGES) && !pfn_valid_within(pfn + i)) - i++; - if (i == MAX_ORDER_NR_PAGES) + pfn = sec_end_pfn + 1, sec_end_pfn += PAGES_PER_SECTION) { + /* Make sure the memory section is present first */ + if (!present_section_nr(pfn_to_section_nr(pfn))) continue; - page = pfn_to_page(pfn + i); - if (zone && page_zone(page) != zone) - return 0; - zone = page_zone(page); + for (; pfn < sec_end_pfn && pfn < end_pfn; + pfn += MAX_ORDER_NR_PAGES) { + i = 0; + /* This is just a CONFIG_HOLES_IN_ZONE check.*/ + while ((i < MAX_ORDER_NR_PAGES) && + !pfn_valid_within(pfn + i)) + i++; + if (i == MAX_ORDER_NR_PAGES) + continue; + page = pfn_to_page(pfn + i); + if (zone && page_zone(page) != zone) + return 0; + zone = page_zone(page); + } } return 1; } diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index fd26d0433..e739825be 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -298,7 +298,7 @@ static ssize_t process_vm_rw_core(pid_t pid, const struct iovec *lvec, goto free_proc_pages; } - mm = mm_access(task, PTRACE_MODE_ATTACH); + mm = mm_access(task, PTRACE_MODE_ATTACH_REALCREDS); if (!mm || IS_ERR(mm)) { rc = IS_ERR(mm) ? PTR_ERR(mm) : -ESRCH; /* |