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Merge branch 'akpm' (patches from Andrew) 

Merge misc updates and fixes from Andrew Morton:

 - late-breaking ocfs2 updates

 - random bunch of fixes

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: disable DEFERRED_STRUCT_PAGE_INIT on !NO_BOOTMEM
  mm/memcontrol.c: move comments for get_mctgt_type() to proper position
  mm/memcontrol.c: fix the margin computation in mem_cgroup_margin()
  mm/cma: silence warnings due to max() usage
  mm: thp: avoid false positive VM_BUG_ON_PAGE in page_move_anon_rmap()
  oom_reaper: close race with exiting task
  mm: use early_pfn_to_nid in register_page_bootmem_info_node
  mm: use early_pfn_to_nid in page_ext_init
  MAINTAINERS: Kdump maintainers update
  MAINTAINERS: add kexec_core.c and kexec_file.c
  mm: oom: do not reap task if there are live threads in threadgroup
  direct-io: fix direct write stale data exposure from concurrent buffered read
  ocfs2: bump up o2cb network protocol version
  ocfs2: o2hb: fix hb hung time
  ocfs2: o2hb: don't negotiate if last hb fail
  ocfs2: o2hb: add some user/debug log
  ocfs2: o2hb: add NEGOTIATE_APPROVE message
  ocfs2: o2hb: add NEGO_TIMEOUT message
  ocfs2: o2hb: add negotiate timer
This commit is contained in:
Linus Torvalds 2016-05-27 14:56:59 -07:00
parent 564884fbde 11e685672a
commit af7d93729c
12 changed files with 246 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
MAINTAINERS
View File

@ -6421,8 +6421,9 @@ F: Documentation/kbuild/kconfig-language.txt
F: scripts/kconfig/
KDUMP
M: Vivek Goyal <vgoyal@redhat.com>
M: Haren Myneni <hbabu@us.ibm.com>
M: Dave Young <dyoung@redhat.com>
M: Baoquan He <bhe@redhat.com>
R: Vivek Goyal <vgoyal@redhat.com>
L: kexec@lists.infradead.org
W: http://lse.sourceforge.net/kdump/
S: Maintained
@ -6568,7 +6569,7 @@ L: kexec@lists.infradead.org
S: Maintained
F: include/linux/kexec.h
F: include/uapi/linux/kexec.h
F: kernel/kexec.c
F: kernel/kexec*
KEYS/KEYRINGS:
M: David Howells <dhowells@redhat.com>

14
fs/direct-io.c
View File

@ -628,11 +628,11 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
map_bh->b_size = fs_count << i_blkbits;
/*
* For writes inside i_size on a DIO_SKIP_HOLES filesystem we
* forbid block creations: only overwrites are permitted.
* We will return early to the caller once we see an
* unmapped buffer head returned, and the caller will fall
* back to buffered I/O.
* For writes that could fill holes inside i_size on a
* DIO_SKIP_HOLES filesystem we forbid block creations: only
* overwrites are permitted. We will return early to the caller
* once we see an unmapped buffer head returned, and the caller
* will fall back to buffered I/O.
*
* Otherwise the decision is left to the get_blocks method,
* which may decide to handle it or also return an unmapped
@ -640,8 +640,8 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
*/
create = dio->rw & WRITE;
if (dio->flags & DIO_SKIP_HOLES) {
if (sdio->block_in_file < (i_size_read(dio->inode) >>
sdio->blkbits))
if (fs_startblk <= ((i_size_read(dio->inode) - 1) >>
i_blkbits))
create = 0;
}

180
fs/ocfs2/cluster/heartbeat.c
View File

@ -272,10 +272,21 @@ struct o2hb_region {
struct delayed_work hr_write_timeout_work;
unsigned long hr_last_timeout_start;
/* negotiate timer, used to negotiate extending hb timeout. */
struct delayed_work hr_nego_timeout_work;
unsigned long hr_nego_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
/* Used during o2hb_check_slot to hold a copy of the block
* being checked because we temporarily have to zero out the
* crc field. */
struct o2hb_disk_heartbeat_block *hr_tmp_block;
/* Message key for negotiate timeout message. */
unsigned int hr_key;
struct list_head hr_handler_list;
/* last hb status, 0 for success, other value for error. */
int hr_last_hb_status;
};
struct o2hb_bio_wait_ctxt {
@ -284,6 +295,17 @@ struct o2hb_bio_wait_ctxt {
int wc_error;
};
#define O2HB_NEGO_TIMEOUT_MS (O2HB_MAX_WRITE_TIMEOUT_MS/2)
enum {
O2HB_NEGO_TIMEOUT_MSG = 1,
O2HB_NEGO_APPROVE_MSG = 2,
};
struct o2hb_nego_msg {
u8 node_num;
};
static void o2hb_write_timeout(struct work_struct *work)
{
int failed, quorum;
@ -319,7 +341,7 @@ static void o2hb_write_timeout(struct work_struct *work)
o2quo_disk_timeout();
}
static void o2hb_arm_write_timeout(struct o2hb_region *reg)
static void o2hb_arm_timeout(struct o2hb_region *reg)
{
/* Arm writeout only after thread reaches steady state */
if (atomic_read(&reg->hr_steady_iterations) != 0)
@ -334,14 +356,132 @@ static void o2hb_arm_write_timeout(struct o2hb_region *reg)
spin_unlock(&o2hb_live_lock);
}
cancel_delayed_work(&reg->hr_write_timeout_work);
reg->hr_last_timeout_start = jiffies;
schedule_delayed_work(&reg->hr_write_timeout_work,
msecs_to_jiffies(O2HB_MAX_WRITE_TIMEOUT_MS));
cancel_delayed_work(&reg->hr_nego_timeout_work);
/* negotiate timeout must be less than write timeout. */
schedule_delayed_work(&reg->hr_nego_timeout_work,
msecs_to_jiffies(O2HB_NEGO_TIMEOUT_MS));
memset(reg->hr_nego_node_bitmap, 0, sizeof(reg->hr_nego_node_bitmap));
}
static void o2hb_disarm_write_timeout(struct o2hb_region *reg)
static void o2hb_disarm_timeout(struct o2hb_region *reg)
{
cancel_delayed_work_sync(&reg->hr_write_timeout_work);
cancel_delayed_work_sync(&reg->hr_nego_timeout_work);
}
static int o2hb_send_nego_msg(int key, int type, u8 target)
{
struct o2hb_nego_msg msg;
int status, ret;
msg.node_num = o2nm_this_node();
again:
ret = o2net_send_message(type, key, &msg, sizeof(msg),
target, &status);
if (ret == -EAGAIN || ret == -ENOMEM) {
msleep(100);
goto again;
}
return ret;
}
static void o2hb_nego_timeout(struct work_struct *work)
{
unsigned long live_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
int master_node, i, ret;
struct o2hb_region *reg;
reg = container_of(work, struct o2hb_region, hr_nego_timeout_work.work);
/* don't negotiate timeout if last hb failed since it is very
* possible io failed. Should let write timeout fence self.
*/
if (reg->hr_last_hb_status)
return;
o2hb_fill_node_map(live_node_bitmap, sizeof(live_node_bitmap));
/* lowest node as master node to make negotiate decision. */
master_node = find_next_bit(live_node_bitmap, O2NM_MAX_NODES, 0);
if (master_node == o2nm_this_node()) {
if (!test_bit(master_node, reg->hr_nego_node_bitmap)) {
printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%s).\n",
o2nm_this_node(), O2HB_NEGO_TIMEOUT_MS/1000,
config_item_name(&reg->hr_item), reg->hr_dev_name);
set_bit(master_node, reg->hr_nego_node_bitmap);
}
if (memcmp(reg->hr_nego_node_bitmap, live_node_bitmap,
sizeof(reg->hr_nego_node_bitmap))) {
/* check negotiate bitmap every second to do timeout
* approve decision.
*/
schedule_delayed_work(&reg->hr_nego_timeout_work,
msecs_to_jiffies(1000));
return;
}
printk(KERN_NOTICE "o2hb: all nodes hb write hung, maybe region %s (%s) is down.\n",
config_item_name(&reg->hr_item), reg->hr_dev_name);
/* approve negotiate timeout request. */
o2hb_arm_timeout(reg);
i = -1;
while ((i = find_next_bit(live_node_bitmap,
O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES) {
if (i == master_node)
continue;
mlog(ML_HEARTBEAT, "send NEGO_APPROVE msg to node %d\n", i);
ret = o2hb_send_nego_msg(reg->hr_key,
O2HB_NEGO_APPROVE_MSG, i);
if (ret)
mlog(ML_ERROR, "send NEGO_APPROVE msg to node %d fail %d\n",
i, ret);
}
} else {
/* negotiate timeout with master node. */
printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%s), negotiate timeout with node %d.\n",
o2nm_this_node(), O2HB_NEGO_TIMEOUT_MS/1000, config_item_name(&reg->hr_item),
reg->hr_dev_name, master_node);
ret = o2hb_send_nego_msg(reg->hr_key, O2HB_NEGO_TIMEOUT_MSG,
master_node);
if (ret)
mlog(ML_ERROR, "send NEGO_TIMEOUT msg to node %d fail %d\n",
master_node, ret);
}
}
static int o2hb_nego_timeout_handler(struct o2net_msg *msg, u32 len, void *data,
void **ret_data)
{
struct o2hb_region *reg = data;
struct o2hb_nego_msg *nego_msg;
nego_msg = (struct o2hb_nego_msg *)msg->buf;
printk(KERN_NOTICE "o2hb: receive negotiate timeout message from node %d on region %s (%s).\n",
nego_msg->node_num, config_item_name(&reg->hr_item), reg->hr_dev_name);
if (nego_msg->node_num < O2NM_MAX_NODES)
set_bit(nego_msg->node_num, reg->hr_nego_node_bitmap);
else
mlog(ML_ERROR, "got nego timeout message from bad node.\n");
return 0;
}
static int o2hb_nego_approve_handler(struct o2net_msg *msg, u32 len, void *data,
void **ret_data)
{
struct o2hb_region *reg = data;
printk(KERN_NOTICE "o2hb: negotiate timeout approved by master node on region %s (%s).\n",
config_item_name(&reg->hr_item), reg->hr_dev_name);
o2hb_arm_timeout(reg);
return 0;
}
static inline void o2hb_bio_wait_init(struct o2hb_bio_wait_ctxt *wc)
@ -1032,7 +1172,8 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg)
/* Skip disarming the timeout if own slot has stale/bad data */
if (own_slot_ok) {
o2hb_set_quorum_device(reg);
o2hb_arm_write_timeout(reg);
o2hb_arm_timeout(reg);
reg->hr_last_timeout_start = jiffies;
}
bail:
@ -1096,6 +1237,7 @@ static int o2hb_thread(void *data)
before_hb = ktime_get_real();
ret = o2hb_do_disk_heartbeat(reg);
reg->hr_last_hb_status = ret;
after_hb = ktime_get_real();
@ -1114,7 +1256,7 @@ static int o2hb_thread(void *data)
}
}
o2hb_disarm_write_timeout(reg);
o2hb_disarm_timeout(reg);
/* unclean stop is only used in very bad situation */
for(i = 0; !reg->hr_unclean_stop && i < reg->hr_blocks; i++)
@ -1451,6 +1593,7 @@ static void o2hb_region_release(struct config_item *item)
list_del(&reg->hr_all_item);
spin_unlock(&o2hb_live_lock);
o2net_unregister_handler_list(&reg->hr_handler_list);
kfree(reg);
}
@ -1762,6 +1905,7 @@ static ssize_t o2hb_region_dev_store(struct config_item *item,
}
INIT_DELAYED_WORK(&reg->hr_write_timeout_work, o2hb_write_timeout);
INIT_DELAYED_WORK(&reg->hr_nego_timeout_work, o2hb_nego_timeout);
/*
* A node is considered live after it has beat LIVE_THRESHOLD
@ -1995,13 +2139,37 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g
config_item_init_type_name(&reg->hr_item, name, &o2hb_region_type);
/* this is the same way to generate msg key as dlm, for local heartbeat,
* name is also the same, so make initial crc value different to avoid
* message key conflict.
*/
reg->hr_key = crc32_le(reg->hr_region_num + O2NM_MAX_REGIONS,
name, strlen(name));
INIT_LIST_HEAD(&reg->hr_handler_list);
ret = o2net_register_handler(O2HB_NEGO_TIMEOUT_MSG, reg->hr_key,
sizeof(struct o2hb_nego_msg),
o2hb_nego_timeout_handler,
reg, NULL, &reg->hr_handler_list);
if (ret)
goto free;
ret = o2net_register_handler(O2HB_NEGO_APPROVE_MSG, reg->hr_key,
sizeof(struct o2hb_nego_msg),
o2hb_nego_approve_handler,
reg, NULL, &reg->hr_handler_list);
if (ret)
goto unregister_handler;
ret = o2hb_debug_region_init(reg, o2hb_debug_dir);
if (ret) {
config_item_put(&reg->hr_item);
goto free;
goto unregister_handler;
}
return &reg->hr_item;
unregister_handler:
o2net_unregister_handler_list(&reg->hr_handler_list);
free:
kfree(reg);
return ERR_PTR(ret);

5
fs/ocfs2/cluster/tcp_internal.h
View File

@ -44,6 +44,9 @@
* version here in tcp_internal.h should not need to be bumped for
* filesystem locking changes.
*
* New in version 12
* - Negotiate hb timeout when storage is down.
*
* New in version 11
* - Negotiation of filesystem locking in the dlm join.
*
@ -75,7 +78,7 @@
* - full 64 bit i_size in the metadata lock lvbs
* - introduction of "rw" lock and pushing meta/data locking down
*/
#define O2NET_PROTOCOL_VERSION 11ULL
#define O2NET_PROTOCOL_VERSION 12ULL
struct o2net_handshake {
__be64 protocol_version;
__be64 connector_id;

3
init/main.c
View File

@ -607,6 +607,7 @@ asmlinkage __visible void __init start_kernel(void)
initrd_start = 0;
}
#endif
page_ext_init();
debug_objects_mem_init();
kmemleak_init();
setup_per_cpu_pageset();
@ -1003,8 +1004,6 @@ static noinline void __init kernel_init_freeable(void)
sched_init_smp();
page_alloc_init_late();
/* Initialize page ext after all struct pages are initializaed */
page_ext_init();
do_basic_setup();

2
mm/Kconfig
View File

@ -648,7 +648,7 @@ config DEFERRED_STRUCT_PAGE_INIT
bool "Defer initialisation of struct pages to kthreads"
default n
depends on ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
depends on MEMORY_HOTPLUG
depends on NO_BOOTMEM && MEMORY_HOTPLUG
depends on !FLATMEM
help
Ordinarily all struct pages are initialised during early boot in a

7
mm/cma.c
View File

@ -183,7 +183,8 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
return -EINVAL;
/* ensure minimal alignment required by mm core */
alignment = PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order);
alignment = PAGE_SIZE <<
max_t(unsigned long, MAX_ORDER - 1, pageblock_order);
/* alignment should be aligned with order_per_bit */
if (!IS_ALIGNED(alignment >> PAGE_SHIFT, 1 << order_per_bit))
@ -266,8 +267,8 @@ int __init cma_declare_contiguous(phys_addr_t base,
* migratetype page by page allocator's buddy algorithm. In the case,
* you couldn't get a contiguous memory, which is not what we want.
*/
alignment = max(alignment,
(phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order));
alignment = max(alignment, (phys_addr_t)PAGE_SIZE <<
max_t(unsigned long, MAX_ORDER - 1, pageblock_order));
base = ALIGN(base, alignment);
size = ALIGN(size, alignment);
limit &= ~(alignment - 1);

39
mm/memcontrol.c
View File

@ -1108,6 +1108,8 @@ static unsigned long mem_cgroup_margin(struct mem_cgroup *memcg)
limit = READ_ONCE(memcg->memsw.limit);
if (count <= limit)
margin = min(margin, limit - count);
else
margin = 0;
}
return margin;
@ -4307,24 +4309,6 @@ static int mem_cgroup_do_precharge(unsigned long count)
return 0;
}
/**
* get_mctgt_type - get target type of moving charge
* @vma: the vma the pte to be checked belongs
* @addr: the address corresponding to the pte to be checked
* @ptent: the pte to be checked
* @target: the pointer the target page or swap ent will be stored(can be NULL)
*
* Returns
* 0(MC_TARGET_NONE): if the pte is not a target for move charge.
* 1(MC_TARGET_PAGE): if the page corresponding to this pte is a target for
* move charge. if @target is not NULL, the page is stored in target->page
* with extra refcnt got(Callers should handle it).
* 2(MC_TARGET_SWAP): if the swap entry corresponding to this pte is a
* target for charge migration. if @target is not NULL, the entry is stored
* in target->ent.
*
* Called with pte lock held.
*/
union mc_target {
struct page *page;
swp_entry_t ent;
@ -4513,6 +4497,25 @@ out:
return ret;
}
/**
* get_mctgt_type - get target type of moving charge
* @vma: the vma the pte to be checked belongs
* @addr: the address corresponding to the pte to be checked
* @ptent: the pte to be checked
* @target: the pointer the target page or swap ent will be stored(can be NULL)
*
* Returns
* 0(MC_TARGET_NONE): if the pte is not a target for move charge.
* 1(MC_TARGET_PAGE): if the page corresponding to this pte is a target for
* move charge. if @target is not NULL, the page is stored in target->page
* with extra refcnt got(Callers should handle it).
* 2(MC_TARGET_SWAP): if the swap entry corresponding to this pte is a
* target for charge migration. if @target is not NULL, the entry is stored
* in target->ent.
*
* Called with pte lock held.
*/
static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
unsigned long addr, pte_t ptent, union mc_target *target)
{

2
mm/memory_hotplug.c
View File

@ -300,7 +300,7 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat)
* multiple nodes we check that this pfn does not already
* reside in some other nodes.
*/
if (pfn_valid(pfn) && (pfn_to_nid(pfn) == node))
if (pfn_valid(pfn) && (early_pfn_to_nid(pfn) == node))
register_page_bootmem_info_section(pfn);
}
}

32
mm/oom_kill.c
View File

@ -443,12 +443,28 @@ static bool __oom_reap_task(struct task_struct *tsk)
{
struct mmu_gather tlb;
struct vm_area_struct *vma;
struct mm_struct *mm;
struct mm_struct *mm = NULL;
struct task_struct *p;
struct zap_details details = {.check_swap_entries = true,
.ignore_dirty = true};
bool ret = true;
/*
* We have to make sure to not race with the victim exit path
* and cause premature new oom victim selection:
* __oom_reap_task exit_mm
* atomic_inc_not_zero
* mmput
* atomic_dec_and_test
* exit_oom_victim
* [...]
* out_of_memory
* select_bad_process
* # no TIF_MEMDIE task selects new victim
* unmap_page_range # frees some memory
*/
mutex_lock(&oom_lock);
/*
* Make sure we find the associated mm_struct even when the particular
* thread has already terminated and cleared its mm.
@ -457,19 +473,19 @@ static bool __oom_reap_task(struct task_struct *tsk)
*/
p = find_lock_task_mm(tsk);
if (!p)
return true;
goto unlock_oom;
mm = p->mm;
if (!atomic_inc_not_zero(&mm->mm_users)) {
task_unlock(p);
return true;
goto unlock_oom;
}
task_unlock(p);
if (!down_read_trylock(&mm->mmap_sem)) {
ret = false;
goto out;
goto unlock_oom;
}
tlb_gather_mmu(&tlb, mm, 0, -1);
@ -511,13 +527,15 @@ static bool __oom_reap_task(struct task_struct *tsk)
* to release its memory.
*/
set_bit(MMF_OOM_REAPED, &mm->flags);
out:
unlock_oom:
mutex_unlock(&oom_lock);
/*
* Drop our reference but make sure the mmput slow path is called from a
* different context because we shouldn't risk we get stuck there and
* put the oom_reaper out of the way.
*/
mmput_async(mm);
if (mm)
mmput_async(mm);
return ret;
}
@ -611,8 +629,6 @@ void try_oom_reaper(struct task_struct *tsk)
if (!process_shares_mm(p, mm))
continue;
if (same_thread_group(p, tsk))
continue;
if (fatal_signal_pending(p))
continue;

4
mm/page_ext.c
View File

@ -390,8 +390,10 @@ void __init page_ext_init(void)
* We know some arch can have a nodes layout such as
* -------------pfn-------------->
* N0 | N1 | N2 | N0 | N1 | N2|....
*
* Take into account DEFERRED_STRUCT_PAGE_INIT.
*/
if (pfn_to_nid(pfn) != nid)
if (early_pfn_to_nid(pfn) != nid)
continue;
if (init_section_page_ext(pfn, nid))
goto oom;

2
mm/rmap.c
View File

@ -1098,6 +1098,8 @@ void page_move_anon_rmap(struct page *page,
VM_BUG_ON_PAGE(!PageLocked(page), page);
VM_BUG_ON_VMA(!anon_vma, vma);
if (IS_ENABLED(CONFIG_DEBUG_VM) && PageTransHuge(page))
address &= HPAGE_PMD_MASK;
VM_BUG_ON_PAGE(page->index != linear_page_index(vma, address), page);
anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;