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authorIngo Molnar <mingo@elte.hu>2008-10-10 19:30:08 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-10 19:30:08 +0200
commit3dd392a407d15250a501fa109cc1f93fee95ef85 (patch)
treec1faca3fa8bd0f7c8790b3e0887229b4a5a90e8b /mm
parentb27a43c1e90582facad44de67d02bc9e9f900289 (diff)
parentd403a6484f0341bf0624d17ece46f24f741b6a92 (diff)
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Merge branch 'linus' into x86/pat2
Conflicts: arch/x86/mm/init_64.c
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c18
-rw-r--r--mm/mmzone.c2
-rw-r--r--mm/page_alloc.c13
-rw-r--r--mm/page_isolation.c12
-rw-r--r--mm/slob.c8
-rw-r--r--mm/slub.c1
-rw-r--r--mm/tiny-shmem.c26
7 files changed, 54 insertions, 26 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0f1f7a7374b..36896f3eb7f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -250,6 +250,14 @@ static struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont)
struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p)
{
+ /*
+ * mm_update_next_owner() may clear mm->owner to NULL
+ * if it races with swapoff, page migration, etc.
+ * So this can be called with p == NULL.
+ */
+ if (unlikely(!p))
+ return NULL;
+
return container_of(task_subsys_state(p, mem_cgroup_subsys_id),
struct mem_cgroup, css);
}
@@ -549,6 +557,11 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
if (likely(!memcg)) {
rcu_read_lock();
mem = mem_cgroup_from_task(rcu_dereference(mm->owner));
+ if (unlikely(!mem)) {
+ rcu_read_unlock();
+ kmem_cache_free(page_cgroup_cache, pc);
+ return 0;
+ }
/*
* For every charge from the cgroup, increment reference count
*/
@@ -801,11 +814,16 @@ int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
rcu_read_lock();
mem = mem_cgroup_from_task(rcu_dereference(mm->owner));
+ if (unlikely(!mem)) {
+ rcu_read_unlock();
+ return 0;
+ }
css_get(&mem->css);
rcu_read_unlock();
do {
progress = try_to_free_mem_cgroup_pages(mem, gfp_mask);
+ progress += res_counter_check_under_limit(&mem->res);
} while (!progress && --retry);
css_put(&mem->css);
diff --git a/mm/mmzone.c b/mm/mmzone.c
index 486ed595ee6..16ce8b955dc 100644
--- a/mm/mmzone.c
+++ b/mm/mmzone.c
@@ -69,6 +69,6 @@ struct zoneref *next_zones_zonelist(struct zoneref *z,
(z->zone && !zref_in_nodemask(z, nodes)))
z++;
- *zone = zonelist_zone(z++);
+ *zone = zonelist_zone(z);
return z;
}
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e293c58bea5..27b8681139f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -268,13 +268,14 @@ void prep_compound_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
+ struct page *p = page + 1;
set_compound_page_dtor(page, free_compound_page);
set_compound_order(page, order);
__SetPageHead(page);
- for (i = 1; i < nr_pages; i++) {
- struct page *p = page + i;
-
+ for (i = 1; i < nr_pages; i++, p++) {
+ if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
+ p = pfn_to_page(page_to_pfn(page) + i);
__SetPageTail(p);
p->first_page = page;
}
@@ -284,6 +285,7 @@ static void destroy_compound_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
+ struct page *p = page + 1;
if (unlikely(compound_order(page) != order))
bad_page(page);
@@ -291,8 +293,9 @@ static void destroy_compound_page(struct page *page, unsigned long order)
if (unlikely(!PageHead(page)))
bad_page(page);
__ClearPageHead(page);
- for (i = 1; i < nr_pages; i++) {
- struct page *p = page + i;
+ for (i = 1; i < nr_pages; i++, p++) {
+ if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
+ p = pfn_to_page(page_to_pfn(page) + i);
if (unlikely(!PageTail(p) |
(p->first_page != page)))
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index c69f84fe038..b70a7fec1ff 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -114,8 +114,10 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn)
int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
{
- unsigned long pfn;
+ unsigned long pfn, flags;
struct page *page;
+ struct zone *zone;
+ int ret;
pfn = start_pfn;
/*
@@ -131,7 +133,9 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
if (pfn < end_pfn)
return -EBUSY;
/* Check all pages are free or Marked as ISOLATED */
- if (__test_page_isolated_in_pageblock(start_pfn, end_pfn))
- return 0;
- return -EBUSY;
+ zone = page_zone(pfn_to_page(pfn));
+ spin_lock_irqsave(&zone->lock, flags);
+ ret = __test_page_isolated_in_pageblock(start_pfn, end_pfn);
+ spin_unlock_irqrestore(&zone->lock, flags);
+ return ret ? 0 : -EBUSY;
}
diff --git a/mm/slob.c b/mm/slob.c
index 4c82dd41f32..cb675d12679 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -514,9 +514,11 @@ size_t ksize(const void *block)
return 0;
sp = (struct slob_page *)virt_to_page(block);
- if (slob_page(sp))
- return ((slob_t *)block - 1)->units + SLOB_UNIT;
- else
+ if (slob_page(sp)) {
+ int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN);
+ unsigned int *m = (unsigned int *)(block - align);
+ return SLOB_UNITS(*m) * SLOB_UNIT;
+ } else
return sp->page.private;
}
diff --git a/mm/slub.c b/mm/slub.c
index fb486d5540f..0c83e6afe7b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1932,6 +1932,7 @@ init_kmem_cache_node(struct kmem_cache_node *n, struct kmem_cache *s)
INIT_LIST_HEAD(&n->partial);
#ifdef CONFIG_SLUB_DEBUG
atomic_long_set(&n->nr_slabs, 0);
+ atomic_long_set(&n->total_objects, 0);
INIT_LIST_HEAD(&n->full);
#endif
}
diff --git a/mm/tiny-shmem.c b/mm/tiny-shmem.c
index ae532f50194..8d7a27a6335 100644
--- a/mm/tiny-shmem.c
+++ b/mm/tiny-shmem.c
@@ -65,31 +65,31 @@ struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags)
if (!dentry)
goto put_memory;
+ error = -ENFILE;
+ file = get_empty_filp();
+ if (!file)
+ goto put_dentry;
+
error = -ENOSPC;
inode = ramfs_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0);
if (!inode)
- goto put_dentry;
+ goto close_file;
d_instantiate(dentry, inode);
- error = -ENFILE;
- file = alloc_file(shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
- &ramfs_file_operations);
- if (!file)
- goto put_dentry;
-
+ inode->i_size = size;
inode->i_nlink = 0; /* It is unlinked */
+ init_file(file, shm_mnt, dentry, FMODE_WRITE | FMODE_READ,
+ &ramfs_file_operations);
- /* notify everyone as to the change of file size */
- error = do_truncate(dentry, size, 0, file);
- if (error < 0)
+#ifndef CONFIG_MMU
+ error = ramfs_nommu_expand_for_mapping(inode, size);
+ if (error)
goto close_file;
-
+#endif
return file;
close_file:
put_filp(file);
- return ERR_PTR(error);
-
put_dentry:
dput(dentry);
put_memory: