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Merge branch 'akpm' (patches from Andrew) 

Merge misc fixes from Andrew Morton:
 "9 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm/vmstat: fix overflow in mod_zone_page_state()
  ocfs2/dlm: clear migration_pending when migration target goes down
  mm/memory_hotplug.c: check for missing sections in test_pages_in_a_zone()
  ocfs2: fix flock panic issue
  m32r: add io*_rep helpers
  m32r: fix build failure
  arch/x86/xen/suspend.c: include xen/xen.h
  mm: memcontrol: fix possible memcg leak due to interrupted reclaim
  ocfs2: fix BUG when calculate new backup super
This commit is contained in:
Linus Torvalds 2015-12-29 18:04:41 -08:00
parent e25bd6ca8f 6cdb18ad98
commit 866be88a1a
10 changed files with 102 additions and 39 deletions
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1
arch/m32r/include/asm/Kbuild
View File

@ -3,6 +3,7 @@ generic-y += clkdev.h
generic-y += cputime.h
generic-y += exec.h
generic-y += irq_work.h
generic-y += kvm_para.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
generic-y += module.h

10
arch/m32r/include/asm/io.h
View File

@ -168,13 +168,21 @@ static inline void _writel(unsigned long l, unsigned long addr)
#define writew_relaxed writew
#define writel_relaxed writel
#define ioread8 read
#define ioread8 readb
#define ioread16 readw
#define ioread32 readl
#define iowrite8 writeb
#define iowrite16 writew
#define iowrite32 writel
#define ioread8_rep(p, dst, count) insb((unsigned long)(p), (dst), (count))
#define ioread16_rep(p, dst, count) insw((unsigned long)(p), (dst), (count))
#define ioread32_rep(p, dst, count) insl((unsigned long)(p), (dst), (count))
#define iowrite8_rep(p, src, count) outsb((unsigned long)(p), (src), (count))
#define iowrite16_rep(p, src, count) outsw((unsigned long)(p), (src), (count))
#define iowrite32_rep(p, src, count) outsl((unsigned long)(p), (src), (count))
#define ioread16be(addr) be16_to_cpu(readw(addr))
#define ioread32be(addr) be32_to_cpu(readl(addr))
#define iowrite16be(v, addr) writew(cpu_to_be16(v), (addr))

1
arch/x86/xen/suspend.c
View File

@ -1,6 +1,7 @@
#include <linux/types.h>
#include <linux/tick.h>
#include <xen/xen.h>
#include <xen/interface/xen.h>
#include <xen/grant_table.h>
#include <xen/events.h>

2
fs/ocfs2/dlm/dlmmaster.c
View File

@ -2843,6 +2843,8 @@ again:
res->state &= ~DLM_LOCK_RES_BLOCK_DIRTY;
if (!ret)
BUG_ON(!(res->state & DLM_LOCK_RES_MIGRATING));
else
res->migration_pending = 0;
spin_unlock(&res->spinlock);
/*

5
fs/ocfs2/locks.c
View File

@ -67,7 +67,10 @@ static int ocfs2_do_flock(struct file *file, struct inode *inode,
*/
locks_lock_file_wait(file,
&(struct file_lock){.fl_type = F_UNLCK});
&(struct file_lock) {
.fl_type = F_UNLCK,
.fl_flags = FL_FLOCK
});
ocfs2_file_unlock(file);
}

15
fs/ocfs2/resize.c
View File

@ -54,11 +54,12 @@
static u16 ocfs2_calc_new_backup_super(struct inode *inode,
struct ocfs2_group_desc *gd,
u16 cl_cpg,
u16 old_bg_clusters,
int set)
{
int i;
u16 backups = 0;
u32 cluster;
u32 cluster, lgd_cluster;
u64 blkno, gd_blkno, lgd_blkno = le64_to_cpu(gd->bg_blkno);
for (i = 0; i < OCFS2_MAX_BACKUP_SUPERBLOCKS; i++) {
@ -71,6 +72,12 @@ static u16 ocfs2_calc_new_backup_super(struct inode *inode,
else if (gd_blkno > lgd_blkno)
break;
/* check if already done backup super */
lgd_cluster = ocfs2_blocks_to_clusters(inode->i_sb, lgd_blkno);
lgd_cluster += old_bg_clusters;
if (lgd_cluster >= cluster)
continue;
if (set)
ocfs2_set_bit(cluster % cl_cpg,
(unsigned long *)gd->bg_bitmap);
@ -99,6 +106,7 @@ static int ocfs2_update_last_group_and_inode(handle_t *handle,
u16 chain, num_bits, backups = 0;
u16 cl_bpc = le16_to_cpu(cl->cl_bpc);
u16 cl_cpg = le16_to_cpu(cl->cl_cpg);
u16 old_bg_clusters;
trace_ocfs2_update_last_group_and_inode(new_clusters,
first_new_cluster);
@ -112,6 +120,7 @@ static int ocfs2_update_last_group_and_inode(handle_t *handle,
group = (struct ocfs2_group_desc *)group_bh->b_data;
old_bg_clusters = le16_to_cpu(group->bg_bits) / cl_bpc;
/* update the group first. */
num_bits = new_clusters * cl_bpc;
le16_add_cpu(&group->bg_bits, num_bits);
@ -125,7 +134,7 @@ static int ocfs2_update_last_group_and_inode(handle_t *handle,
OCFS2_FEATURE_COMPAT_BACKUP_SB)) {
backups = ocfs2_calc_new_backup_super(bm_inode,
group,
cl_cpg, 1);
cl_cpg, old_bg_clusters, 1);
le16_add_cpu(&group->bg_free_bits_count, -1 * backups);
}
@ -163,7 +172,7 @@ out_rollback:
if (ret < 0) {
ocfs2_calc_new_backup_super(bm_inode,
group,
cl_cpg, 0);
cl_cpg, old_bg_clusters, 0);
le16_add_cpu(&group->bg_free_bits_count, backups);
le16_add_cpu(&group->bg_bits, -1 * num_bits);
le16_add_cpu(&group->bg_free_bits_count, -1 * num_bits);

6
include/linux/vmstat.h
View File

@ -176,11 +176,11 @@ extern void zone_statistics(struct zone *, struct zone *, gfp_t gfp);
#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
#ifdef CONFIG_SMP
void __mod_zone_page_state(struct zone *, enum zone_stat_item item, int);
void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long);
void __inc_zone_page_state(struct page *, enum zone_stat_item);
void __dec_zone_page_state(struct page *, enum zone_stat_item);
void mod_zone_page_state(struct zone *, enum zone_stat_item, int);
void mod_zone_page_state(struct zone *, enum zone_stat_item, long);
void inc_zone_page_state(struct page *, enum zone_stat_item);
void dec_zone_page_state(struct page *, enum zone_stat_item);
@ -205,7 +205,7 @@ void set_pgdat_percpu_threshold(pg_data_t *pgdat,
* The functions directly modify the zone and global counters.
*/
static inline void __mod_zone_page_state(struct zone *zone,
enum zone_stat_item item, int delta)
enum zone_stat_item item, long delta)
{
zone_page_state_add(delta, zone, item);
}

60
mm/memcontrol.c
View File

@ -903,14 +903,20 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
if (prev && reclaim->generation != iter->generation)
goto out_unlock;
do {
while (1) {
pos = READ_ONCE(iter->position);
if (!pos || css_tryget(&pos->css))
break;
/*
* A racing update may change the position and
* put the last reference, hence css_tryget(),
* or retry to see the updated position.
* css reference reached zero, so iter->position will
* be cleared by ->css_released. However, we should not
* rely on this happening soon, because ->css_released
* is called from a work queue, and by busy-waiting we
* might block it. So we clear iter->position right
* away.
*/
} while (pos && !css_tryget(&pos->css));
(void)cmpxchg(&iter->position, pos, NULL);
}
}
if (pos)
@ -956,17 +962,13 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *root,
}
if (reclaim) {
if (cmpxchg(&iter->position, pos, memcg) == pos) {
if (memcg)
css_get(&memcg->css);
if (pos)
css_put(&pos->css);
}
/*
* pairs with css_tryget when dereferencing iter->position
* above.
* The position could have already been updated by a competing
* thread, so check that the value hasn't changed since we read
* it to avoid reclaiming from the same cgroup twice.
*/
(void)cmpxchg(&iter->position, pos, memcg);
if (pos)
css_put(&pos->css);
@ -999,6 +1001,28 @@ void mem_cgroup_iter_break(struct mem_cgroup *root,
css_put(&prev->css);
}
static void invalidate_reclaim_iterators(struct mem_cgroup *dead_memcg)
{
struct mem_cgroup *memcg = dead_memcg;
struct mem_cgroup_reclaim_iter *iter;
struct mem_cgroup_per_zone *mz;
int nid, zid;
int i;
while ((memcg = parent_mem_cgroup(memcg))) {
for_each_node(nid) {
for (zid = 0; zid < MAX_NR_ZONES; zid++) {
mz = &memcg->nodeinfo[nid]->zoneinfo[zid];
for (i = 0; i <= DEF_PRIORITY; i++) {
iter = &mz->iter[i];
cmpxchg(&iter->position,
dead_memcg, NULL);
}
}
}
}
}
/*
* Iteration constructs for visiting all cgroups (under a tree). If
* loops are exited prematurely (break), mem_cgroup_iter_break() must
@ -4324,6 +4348,13 @@ static void mem_cgroup_css_offline(struct cgroup_subsys_state *css)
wb_memcg_offline(memcg);
}
static void mem_cgroup_css_released(struct cgroup_subsys_state *css)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
invalidate_reclaim_iterators(memcg);
}
static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
@ -5185,6 +5216,7 @@ struct cgroup_subsys memory_cgrp_subsys = {
.css_alloc = mem_cgroup_css_alloc,
.css_online = mem_cgroup_css_online,
.css_offline = mem_cgroup_css_offline,
.css_released = mem_cgroup_css_released,
.css_free = mem_cgroup_css_free,
.css_reset = mem_cgroup_css_reset,
.can_attach = mem_cgroup_can_attach,

31
mm/memory_hotplug.c
View File

@ -1375,23 +1375,30 @@ int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
*/
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;
}

10
mm/vmstat.c
View File

@ -219,7 +219,7 @@ void set_pgdat_percpu_threshold(pg_data_t *pgdat,
* particular counter cannot be updated from interrupt context.
*/
void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
long delta)
{
struct per_cpu_pageset __percpu *pcp = zone->pageset;
s8 __percpu *p = pcp->vm_stat_diff + item;
@ -318,8 +318,8 @@ EXPORT_SYMBOL(__dec_zone_page_state);
* 1 Overstepping half of threshold
* -1 Overstepping minus half of threshold
*/
static inline void mod_state(struct zone *zone,
enum zone_stat_item item, int delta, int overstep_mode)
static inline void mod_state(struct zone *zone, enum zone_stat_item item,
long delta, int overstep_mode)
{
struct per_cpu_pageset __percpu *pcp = zone->pageset;
s8 __percpu *p = pcp->vm_stat_diff + item;
@ -357,7 +357,7 @@ static inline void mod_state(struct zone *zone,
}
void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
long delta)
{
mod_state(zone, item, delta, 0);
}
@ -384,7 +384,7 @@ EXPORT_SYMBOL(dec_zone_page_state);
* Use interrupt disable to serialize counter updates
*/
void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
long delta)
{
unsigned long flags;