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authorLinus Torvalds <torvalds@linux-foundation.org>2019-12-05 09:46:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-12-05 09:46:26 -0800
commit5ecc9d15f73b82c748526350d5602c94fdd65cac (patch)
tree686ae55a0de4be8bad9e2248b019e459525cb109 /mm
parent2f13437b8917627119d163d62f73e7a78a92303a (diff)
parentf949286c668aed5aa24acdb5838be9cfd9513bd3 (diff)
downloadlinux-5ecc9d15f73b82c748526350d5602c94fdd65cac.tar.bz2
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "Most of the rest of MM and various other things. Some Kconfig rework still awaits merges of dependent trees from linux-next. Subsystems affected by this patch series: mm/hotfixes, mm/memcg, mm/vmstat, mm/thp, procfs, sysctl, misc, notifiers, core-kernel, bitops, lib, checkpatch, epoll, binfmt, init, rapidio, uaccess, kcov, ubsan, ipc, bitmap, mm/pagemap" * akpm: (86 commits) mm: remove __ARCH_HAS_4LEVEL_HACK and include/asm-generic/4level-fixup.h um: add support for folded p4d page tables um: remove unused pxx_offset_proc() and addr_pte() functions sparc32: use pgtable-nopud instead of 4level-fixup parisc/hugetlb: use pgtable-nopXd instead of 4level-fixup parisc: use pgtable-nopXd instead of 4level-fixup nds32: use pgtable-nopmd instead of 4level-fixup microblaze: use pgtable-nopmd instead of 4level-fixup m68k: mm: use pgtable-nopXd instead of 4level-fixup m68k: nommu: use pgtable-nopud instead of 4level-fixup c6x: use pgtable-nopud instead of 4level-fixup arm: nommu: use pgtable-nopud instead of 4level-fixup alpha: use pgtable-nopud instead of 4level-fixup gpio: pca953x: tighten up indentation gpio: pca953x: convert to use bitmap API gpio: pca953x: use input from regs structure in pca953x_irq_pending() gpio: pca953x: remove redundant variable and check in IRQ handler lib/bitmap: introduce bitmap_replace() helper lib/test_bitmap: fix comment about this file lib/test_bitmap: move exp1 and exp2 upper for others to use ...
Diffstat (limited to 'mm')
-rw-r--r--mm/kasan/common.c1
-rw-r--r--mm/memcontrol.c52
-rw-r--r--mm/memory.c10
-rw-r--r--mm/slab_common.c12
-rw-r--r--mm/vmstat.c60
5 files changed, 61 insertions, 74 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index df3371d5c572..2fa710bb6358 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -36,6 +36,7 @@
#include <linux/bug.h>
#include <linux/uaccess.h>
+#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include "kasan.h"
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index bc01423277c5..c5b5f74cfd4d 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -98,14 +98,6 @@ static bool do_memsw_account(void)
return !cgroup_subsys_on_dfl(memory_cgrp_subsys) && do_swap_account;
}
-static const char *const mem_cgroup_lru_names[] = {
- "inactive_anon",
- "active_anon",
- "inactive_file",
- "active_file",
- "unevictable",
-};
-
#define THRESHOLDS_EVENTS_TARGET 128
#define SOFTLIMIT_EVENTS_TARGET 1024
@@ -1421,7 +1413,7 @@ static char *memory_stat_format(struct mem_cgroup *memcg)
PAGE_SIZE);
for (i = 0; i < NR_LRU_LISTS; i++)
- seq_buf_printf(&s, "%s %llu\n", mem_cgroup_lru_names[i],
+ seq_buf_printf(&s, "%s %llu\n", lru_list_name(i),
(u64)memcg_page_state(memcg, NR_LRU_BASE + i) *
PAGE_SIZE);
@@ -1434,8 +1426,10 @@ static char *memory_stat_format(struct mem_cgroup *memcg)
/* Accumulated memory events */
- seq_buf_printf(&s, "pgfault %lu\n", memcg_events(memcg, PGFAULT));
- seq_buf_printf(&s, "pgmajfault %lu\n", memcg_events(memcg, PGMAJFAULT));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGFAULT),
+ memcg_events(memcg, PGFAULT));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGMAJFAULT),
+ memcg_events(memcg, PGMAJFAULT));
seq_buf_printf(&s, "workingset_refault %lu\n",
memcg_page_state(memcg, WORKINGSET_REFAULT));
@@ -1444,22 +1438,27 @@ static char *memory_stat_format(struct mem_cgroup *memcg)
seq_buf_printf(&s, "workingset_nodereclaim %lu\n",
memcg_page_state(memcg, WORKINGSET_NODERECLAIM));
- seq_buf_printf(&s, "pgrefill %lu\n", memcg_events(memcg, PGREFILL));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGREFILL),
+ memcg_events(memcg, PGREFILL));
seq_buf_printf(&s, "pgscan %lu\n",
memcg_events(memcg, PGSCAN_KSWAPD) +
memcg_events(memcg, PGSCAN_DIRECT));
seq_buf_printf(&s, "pgsteal %lu\n",
memcg_events(memcg, PGSTEAL_KSWAPD) +
memcg_events(memcg, PGSTEAL_DIRECT));
- seq_buf_printf(&s, "pgactivate %lu\n", memcg_events(memcg, PGACTIVATE));
- seq_buf_printf(&s, "pgdeactivate %lu\n", memcg_events(memcg, PGDEACTIVATE));
- seq_buf_printf(&s, "pglazyfree %lu\n", memcg_events(memcg, PGLAZYFREE));
- seq_buf_printf(&s, "pglazyfreed %lu\n", memcg_events(memcg, PGLAZYFREED));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGACTIVATE),
+ memcg_events(memcg, PGACTIVATE));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGDEACTIVATE),
+ memcg_events(memcg, PGDEACTIVATE));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGLAZYFREE),
+ memcg_events(memcg, PGLAZYFREE));
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(PGLAZYFREED),
+ memcg_events(memcg, PGLAZYFREED));
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- seq_buf_printf(&s, "thp_fault_alloc %lu\n",
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(THP_FAULT_ALLOC),
memcg_events(memcg, THP_FAULT_ALLOC));
- seq_buf_printf(&s, "thp_collapse_alloc %lu\n",
+ seq_buf_printf(&s, "%s %lu\n", vm_event_name(THP_COLLAPSE_ALLOC),
memcg_events(memcg, THP_COLLAPSE_ALLOC));
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
@@ -3742,13 +3741,6 @@ static const unsigned int memcg1_events[] = {
PGMAJFAULT,
};
-static const char *const memcg1_event_names[] = {
- "pgpgin",
- "pgpgout",
- "pgfault",
- "pgmajfault",
-};
-
static int memcg_stat_show(struct seq_file *m, void *v)
{
struct mem_cgroup *memcg = mem_cgroup_from_seq(m);
@@ -3757,7 +3749,6 @@ static int memcg_stat_show(struct seq_file *m, void *v)
unsigned int i;
BUILD_BUG_ON(ARRAY_SIZE(memcg1_stat_names) != ARRAY_SIZE(memcg1_stats));
- BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS);
for (i = 0; i < ARRAY_SIZE(memcg1_stats); i++) {
if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account())
@@ -3768,11 +3759,11 @@ static int memcg_stat_show(struct seq_file *m, void *v)
}
for (i = 0; i < ARRAY_SIZE(memcg1_events); i++)
- seq_printf(m, "%s %lu\n", memcg1_event_names[i],
+ seq_printf(m, "%s %lu\n", vm_event_name(memcg1_events[i]),
memcg_events_local(memcg, memcg1_events[i]));
for (i = 0; i < NR_LRU_LISTS; i++)
- seq_printf(m, "%s %lu\n", mem_cgroup_lru_names[i],
+ seq_printf(m, "%s %lu\n", lru_list_name(i),
memcg_page_state_local(memcg, NR_LRU_BASE + i) *
PAGE_SIZE);
@@ -3797,11 +3788,12 @@ static int memcg_stat_show(struct seq_file *m, void *v)
}
for (i = 0; i < ARRAY_SIZE(memcg1_events); i++)
- seq_printf(m, "total_%s %llu\n", memcg1_event_names[i],
+ seq_printf(m, "total_%s %llu\n",
+ vm_event_name(memcg1_events[i]),
(u64)memcg_events(memcg, memcg1_events[i]));
for (i = 0; i < NR_LRU_LISTS; i++)
- seq_printf(m, "total_%s %llu\n", mem_cgroup_lru_names[i],
+ seq_printf(m, "total_%s %llu\n", lru_list_name(i),
(u64)memcg_page_state(memcg, NR_LRU_BASE + i) *
PAGE_SIZE);
diff --git a/mm/memory.c b/mm/memory.c
index 513c3ecc76ee..606da187d1de 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -672,7 +672,7 @@ struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr,
if (pmd_devmap(pmd))
return NULL;
- if (is_zero_pfn(pfn))
+ if (is_huge_zero_pmd(pmd))
return NULL;
if (unlikely(pfn > highest_memmap_pfn))
return NULL;
@@ -4197,19 +4197,11 @@ int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address)
smp_wmb(); /* See comment in __pte_alloc */
ptl = pud_lock(mm, pud);
-#ifndef __ARCH_HAS_4LEVEL_HACK
if (!pud_present(*pud)) {
mm_inc_nr_pmds(mm);
pud_populate(mm, pud, new);
} else /* Another has populated it */
pmd_free(mm, new);
-#else
- if (!pgd_present(*pud)) {
- mm_inc_nr_pmds(mm);
- pgd_populate(mm, pud, new);
- } else /* Another has populated it */
- pmd_free(mm, new);
-#endif /* __ARCH_HAS_4LEVEL_HACK */
spin_unlock(ptl);
return 0;
}
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 8afa188f6e20..f0ab6d4ceb4c 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -904,6 +904,18 @@ static void flush_memcg_workqueue(struct kmem_cache *s)
* previous workitems on workqueue are processed.
*/
flush_workqueue(memcg_kmem_cache_wq);
+
+ /*
+ * If we're racing with children kmem_cache deactivation, it might
+ * take another rcu grace period to complete their destruction.
+ * At this moment the corresponding percpu_ref_kill() call should be
+ * done, but it might take another rcu grace period to complete
+ * switching to the atomic mode.
+ * Please, note that we check without grabbing the slab_mutex. It's safe
+ * because at this moment the children list can't grow.
+ */
+ if (!list_empty(&s->memcg_params.children))
+ rcu_barrier();
}
#else
static inline int shutdown_memcg_caches(struct kmem_cache *s)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index a8222041bd44..78d53378db99 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1084,7 +1084,8 @@ int fragmentation_index(struct zone *zone, unsigned int order)
}
#endif
-#if defined(CONFIG_PROC_FS) || defined(CONFIG_SYSFS) || defined(CONFIG_NUMA)
+#if defined(CONFIG_PROC_FS) || defined(CONFIG_SYSFS) || \
+ defined(CONFIG_NUMA) || defined(CONFIG_MEMCG)
#ifdef CONFIG_ZONE_DMA
#define TEXT_FOR_DMA(xx) xx "_dma",
#else
@@ -1134,7 +1135,7 @@ const char * const vmstat_text[] = {
"numa_other",
#endif
- /* Node-based counters */
+ /* enum node_stat_item counters */
"nr_inactive_anon",
"nr_active_anon",
"nr_inactive_file",
@@ -1172,7 +1173,7 @@ const char * const vmstat_text[] = {
"nr_dirty_threshold",
"nr_dirty_background_threshold",
-#ifdef CONFIG_VM_EVENT_COUNTERS
+#if defined(CONFIG_VM_EVENT_COUNTERS) || defined(CONFIG_MEMCG)
/* enum vm_event_item counters */
"pgpgin",
"pgpgout",
@@ -1291,9 +1292,9 @@ const char * const vmstat_text[] = {
"swap_ra",
"swap_ra_hit",
#endif
-#endif /* CONFIG_VM_EVENTS_COUNTERS */
+#endif /* CONFIG_VM_EVENT_COUNTERS || CONFIG_MEMCG */
};
-#endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA */
+#endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA || CONFIG_MEMCG */
#if (defined(CONFIG_DEBUG_FS) && defined(CONFIG_COMPACTION)) || \
defined(CONFIG_PROC_FS)
@@ -1564,10 +1565,8 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
if (is_zone_first_populated(pgdat, zone)) {
seq_printf(m, "\n per-node stats");
for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
- seq_printf(m, "\n %-12s %lu",
- vmstat_text[i + NR_VM_ZONE_STAT_ITEMS +
- NR_VM_NUMA_STAT_ITEMS],
- node_page_state(pgdat, i));
+ seq_printf(m, "\n %-12s %lu", node_stat_name(i),
+ node_page_state(pgdat, i));
}
}
seq_printf(m,
@@ -1600,14 +1599,13 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
}
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- seq_printf(m, "\n %-12s %lu", vmstat_text[i],
- zone_page_state(zone, i));
+ seq_printf(m, "\n %-12s %lu", zone_stat_name(i),
+ zone_page_state(zone, i));
#ifdef CONFIG_NUMA
for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++)
- seq_printf(m, "\n %-12s %lu",
- vmstat_text[i + NR_VM_ZONE_STAT_ITEMS],
- zone_numa_state_snapshot(zone, i));
+ seq_printf(m, "\n %-12s %lu", numa_stat_name(i),
+ zone_numa_state_snapshot(zone, i));
#endif
seq_printf(m, "\n pagesets");
@@ -1658,31 +1656,23 @@ static const struct seq_operations zoneinfo_op = {
.show = zoneinfo_show,
};
-enum writeback_stat_item {
- NR_DIRTY_THRESHOLD,
- NR_DIRTY_BG_THRESHOLD,
- NR_VM_WRITEBACK_STAT_ITEMS,
-};
+#define NR_VMSTAT_ITEMS (NR_VM_ZONE_STAT_ITEMS + \
+ NR_VM_NUMA_STAT_ITEMS + \
+ NR_VM_NODE_STAT_ITEMS + \
+ NR_VM_WRITEBACK_STAT_ITEMS + \
+ (IS_ENABLED(CONFIG_VM_EVENT_COUNTERS) ? \
+ NR_VM_EVENT_ITEMS : 0))
static void *vmstat_start(struct seq_file *m, loff_t *pos)
{
unsigned long *v;
- int i, stat_items_size;
+ int i;
- if (*pos >= ARRAY_SIZE(vmstat_text))
+ if (*pos >= NR_VMSTAT_ITEMS)
return NULL;
- stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) +
- NR_VM_NUMA_STAT_ITEMS * sizeof(unsigned long) +
- NR_VM_NODE_STAT_ITEMS * sizeof(unsigned long) +
- NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long);
-
-#ifdef CONFIG_VM_EVENT_COUNTERS
- stat_items_size += sizeof(struct vm_event_state);
-#endif
- BUILD_BUG_ON(stat_items_size !=
- ARRAY_SIZE(vmstat_text) * sizeof(unsigned long));
- v = kmalloc(stat_items_size, GFP_KERNEL);
+ BUILD_BUG_ON(ARRAY_SIZE(vmstat_text) < NR_VMSTAT_ITEMS);
+ v = kmalloc_array(NR_VMSTAT_ITEMS, sizeof(unsigned long), GFP_KERNEL);
m->private = v;
if (!v)
return ERR_PTR(-ENOMEM);
@@ -1715,7 +1705,7 @@ static void *vmstat_start(struct seq_file *m, loff_t *pos)
static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos)
{
(*pos)++;
- if (*pos >= ARRAY_SIZE(vmstat_text))
+ if (*pos >= NR_VMSTAT_ITEMS)
return NULL;
return (unsigned long *)m->private + *pos;
}
@@ -1781,7 +1771,7 @@ int vmstat_refresh(struct ctl_table *table, int write,
val = atomic_long_read(&vm_zone_stat[i]);
if (val < 0) {
pr_warn("%s: %s %ld\n",
- __func__, vmstat_text[i], val);
+ __func__, zone_stat_name(i), val);
err = -EINVAL;
}
}
@@ -1790,7 +1780,7 @@ int vmstat_refresh(struct ctl_table *table, int write,
val = atomic_long_read(&vm_numa_stat[i]);
if (val < 0) {
pr_warn("%s: %s %ld\n",
- __func__, vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], val);
+ __func__, numa_stat_name(i), val);
err = -EINVAL;
}
}