diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory-failure.c | 21 | ||||
| -rw-r--r-- | mm/oom_kill.c | 2 | ||||
| -rw-r--r-- | mm/page-writeback.c | 57 | ||||
| -rw-r--r-- | mm/slub.c | 8 | ||||
| -rw-r--r-- | mm/vmscan.c | 49 |
5 files changed, 59 insertions, 78 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 7e3601ce51c..3b4120e38d4 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -854,14 +854,14 @@ static int page_action(struct page_state *ps, struct page *p, * the pages and send SIGBUS to the processes if the data was dirty. */ static int hwpoison_user_mappings(struct page *p, unsigned long pfn, - int trapno, int flags) + int trapno, int flags, struct page **hpagep) { enum ttu_flags ttu = TTU_UNMAP | TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS; struct address_space *mapping; LIST_HEAD(tokill); int ret; int kill = 1, forcekill; - struct page *hpage = compound_head(p); + struct page *hpage = *hpagep; struct page *ppage; if (PageReserved(p) || PageSlab(p)) @@ -940,11 +940,14 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn, * We pinned the head page for hwpoison handling, * now we split the thp and we are interested in * the hwpoisoned raw page, so move the refcount - * to it. + * to it. Similarly, page lock is shifted. */ if (hpage != p) { put_page(hpage); get_page(p); + lock_page(p); + unlock_page(hpage); + *hpagep = p; } /* THP is split, so ppage should be the real poisoned page. */ ppage = p; @@ -962,17 +965,11 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn, if (kill) collect_procs(ppage, &tokill); - if (hpage != ppage) - lock_page(ppage); - ret = try_to_unmap(ppage, ttu); if (ret != SWAP_SUCCESS) printk(KERN_ERR "MCE %#lx: failed to unmap page (mapcount=%d)\n", pfn, page_mapcount(ppage)); - if (hpage != ppage) - unlock_page(ppage); - /* * Now that the dirty bit has been propagated to the * struct page and all unmaps done we can decide if @@ -1189,8 +1186,12 @@ int memory_failure(unsigned long pfn, int trapno, int flags) /* * Now take care of user space mappings. * Abort on fail: __delete_from_page_cache() assumes unmapped page. + * + * When the raw error page is thp tail page, hpage points to the raw + * page after thp split. */ - if (hwpoison_user_mappings(p, pfn, trapno, flags) != SWAP_SUCCESS) { + if (hwpoison_user_mappings(p, pfn, trapno, flags, &hpage) + != SWAP_SUCCESS) { printk(KERN_ERR "MCE %#lx: cannot unmap page, give up\n", pfn); res = -EBUSY; goto out; diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 79e451a78c9..dfa94ed3c7f 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -170,7 +170,7 @@ unsigned long oom_badness(struct task_struct *p, struct mem_cgroup *memcg, * implementation used by LSMs. */ if (has_capability_noaudit(p, CAP_SYS_ADMIN)) - adj -= 30; + points -= (points * 3) / 100; /* Normalize to oom_score_adj units */ adj *= totalpages / 1000; diff --git a/mm/page-writeback.c b/mm/page-writeback.c index aca4364275b..5a06d4cb9a3 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -188,6 +188,26 @@ static unsigned long writeout_period_time = 0; * global dirtyable memory first. */ +/** + * zone_dirtyable_memory - number of dirtyable pages in a zone + * @zone: the zone + * + * Returns the zone's number of pages potentially available for dirty + * page cache. This is the base value for the per-zone dirty limits. + */ +static unsigned long zone_dirtyable_memory(struct zone *zone) +{ + unsigned long nr_pages; + + nr_pages = zone_page_state(zone, NR_FREE_PAGES); + nr_pages -= min(nr_pages, zone->dirty_balance_reserve); + + nr_pages += zone_page_state(zone, NR_INACTIVE_FILE); + nr_pages += zone_page_state(zone, NR_ACTIVE_FILE); + + return nr_pages; +} + static unsigned long highmem_dirtyable_memory(unsigned long total) { #ifdef CONFIG_HIGHMEM @@ -195,11 +215,9 @@ static unsigned long highmem_dirtyable_memory(unsigned long total) unsigned long x = 0; for_each_node_state(node, N_HIGH_MEMORY) { - struct zone *z = - &NODE_DATA(node)->node_zones[ZONE_HIGHMEM]; + struct zone *z = &NODE_DATA(node)->node_zones[ZONE_HIGHMEM]; - x += zone_page_state(z, NR_FREE_PAGES) + - zone_reclaimable_pages(z) - z->dirty_balance_reserve; + x += zone_dirtyable_memory(z); } /* * Unreclaimable memory (kernel memory or anonymous memory @@ -235,9 +253,12 @@ static unsigned long global_dirtyable_memory(void) { unsigned long x; - x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages(); + x = global_page_state(NR_FREE_PAGES); x -= min(x, dirty_balance_reserve); + x += global_page_state(NR_INACTIVE_FILE); + x += global_page_state(NR_ACTIVE_FILE); + if (!vm_highmem_is_dirtyable) x -= highmem_dirtyable_memory(x); @@ -289,32 +310,6 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty) } /** - * zone_dirtyable_memory - number of dirtyable pages in a zone - * @zone: the zone - * - * Returns the zone's number of pages potentially available for dirty - * page cache. This is the base value for the per-zone dirty limits. - */ -static unsigned long zone_dirtyable_memory(struct zone *zone) -{ - /* - * The effective global number of dirtyable pages may exclude - * highmem as a big-picture measure to keep the ratio between - * dirty memory and lowmem reasonable. - * - * But this function is purely about the individual zone and a - * highmem zone can hold its share of dirty pages, so we don't - * care about vm_highmem_is_dirtyable here. - */ - unsigned long nr_pages = zone_page_state(zone, NR_FREE_PAGES) + - zone_reclaimable_pages(zone); - - /* don't allow this to underflow */ - nr_pages -= min(nr_pages, zone->dirty_balance_reserve); - return nr_pages; -} - -/** * zone_dirty_limit - maximum number of dirty pages allowed in a zone * @zone: the zone * diff --git a/mm/slub.c b/mm/slub.c index c34bd44e8be..deaed7b4721 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -4285,7 +4285,13 @@ static ssize_t show_slab_objects(struct kmem_cache *s, page = ACCESS_ONCE(c->partial); if (page) { - x = page->pobjects; + node = page_to_nid(page); + if (flags & SO_TOTAL) + WARN_ON_ONCE(1); + else if (flags & SO_OBJECTS) + WARN_ON_ONCE(1); + else + x = page->pages; total += x; nodes[node] += x; } diff --git a/mm/vmscan.c b/mm/vmscan.c index 78baaa80eee..c3d074ea137 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2160,6 +2160,20 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc) return aborted_reclaim; } +static unsigned long zone_reclaimable_pages(struct zone *zone) +{ + int nr; + + nr = zone_page_state(zone, NR_ACTIVE_FILE) + + zone_page_state(zone, NR_INACTIVE_FILE); + + if (get_nr_swap_pages() > 0) + nr += zone_page_state(zone, NR_ACTIVE_ANON) + + zone_page_state(zone, NR_INACTIVE_ANON); + + return nr; +} + static bool zone_reclaimable(struct zone *zone) { return zone->pages_scanned < zone_reclaimable_pages(zone) * 6; @@ -3118,41 +3132,6 @@ void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx) wake_up_interruptible(&pgdat->kswapd_wait); } -/* - * The reclaimable count would be mostly accurate. - * The less reclaimable pages may be - * - mlocked pages, which will be moved to unevictable list when encountered - * - mapped pages, which may require several travels to be reclaimed - * - dirty pages, which is not "instantly" reclaimable - */ -unsigned long global_reclaimable_pages(void) -{ - int nr; - - nr = global_page_state(NR_ACTIVE_FILE) + - global_page_state(NR_INACTIVE_FILE); - - if (get_nr_swap_pages() > 0) - nr += global_page_state(NR_ACTIVE_ANON) + - global_page_state(NR_INACTIVE_ANON); - - return nr; -} - -unsigned long zone_reclaimable_pages(struct zone *zone) -{ - int nr; - - nr = zone_page_state(zone, NR_ACTIVE_FILE) + - zone_page_state(zone, NR_INACTIVE_FILE); - - if (get_nr_swap_pages() > 0) - nr += zone_page_state(zone, NR_ACTIVE_ANON) + - zone_page_state(zone, NR_INACTIVE_ANON); - - return nr; -} - #ifdef CONFIG_HIBERNATION /* * Try to free `nr_to_reclaim' of memory, system-wide, and return the number of |