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-rw-r--r--mm/Kconfig4
-rw-r--r--mm/backing-dev.c2
-rw-r--r--mm/kmemleak.c5
-rw-r--r--mm/ksm.c10
-rw-r--r--mm/page-writeback.c3
-rw-r--r--mm/percpu.c5
-rw-r--r--mm/swapfile.c12
-rw-r--r--mm/vmalloc.c50
8 files changed, 51 insertions, 40 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index edd300aca173..57963c6063d1 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -224,7 +224,9 @@ config KSM
the many instances by a single resident page with that content, so
saving memory until one or another app needs to modify the content.
Recommended for use with KVM, or with other duplicative applications.
- See Documentation/vm/ksm.txt for more information.
+ See Documentation/vm/ksm.txt for more information: KSM is inactive
+ until a program has madvised that an area is MADV_MERGEABLE, and
+ root has set /sys/kernel/mm/ksm/run to 1 (if CONFIG_SYSFS is set).
config DEFAULT_MMAP_MIN_ADDR
int "Low address space to protect from user allocation"
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 3d3accb1f800..5a37e2055717 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -92,7 +92,7 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v)
"BdiDirtyThresh: %8lu kB\n"
"DirtyThresh: %8lu kB\n"
"BackgroundThresh: %8lu kB\n"
- "WriteBack threads:%8lu\n"
+ "WritebackThreads: %8lu\n"
"b_dirty: %8lu\n"
"b_io: %8lu\n"
"b_more_io: %8lu\n"
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 4ea4510e2996..8bf765c4f58d 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -833,12 +833,15 @@ static void early_alloc(struct early_log *log)
*/
rcu_read_lock();
object = create_object((unsigned long)log->ptr, log->size,
- log->min_count, GFP_KERNEL);
+ log->min_count, GFP_ATOMIC);
+ if (!object)
+ goto out;
spin_lock_irqsave(&object->lock, flags);
for (i = 0; i < log->trace_len; i++)
object->trace[i] = log->trace[i];
object->trace_len = log->trace_len;
spin_unlock_irqrestore(&object->lock, flags);
+out:
rcu_read_unlock();
}
diff --git a/mm/ksm.c b/mm/ksm.c
index f7edac356f46..bef1af4f77e3 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -184,11 +184,6 @@ static DEFINE_SPINLOCK(ksm_mmlist_lock);
sizeof(struct __struct), __alignof__(struct __struct),\
(__flags), NULL)
-static void __init ksm_init_max_kernel_pages(void)
-{
- ksm_max_kernel_pages = nr_free_buffer_pages() / 4;
-}
-
static int __init ksm_slab_init(void)
{
rmap_item_cache = KSM_KMEM_CACHE(rmap_item, 0);
@@ -1673,7 +1668,7 @@ static int __init ksm_init(void)
struct task_struct *ksm_thread;
int err;
- ksm_init_max_kernel_pages();
+ ksm_max_kernel_pages = totalram_pages / 4;
err = ksm_slab_init();
if (err)
@@ -1697,6 +1692,9 @@ static int __init ksm_init(void)
kthread_stop(ksm_thread);
goto out_free2;
}
+#else
+ ksm_run = KSM_RUN_MERGE; /* no way for user to start it */
+
#endif /* CONFIG_SYSFS */
return 0;
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index a3b14090b1fb..2c5d79236ead 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -566,7 +566,8 @@ static void balance_dirty_pages(struct address_space *mapping,
if (pages_written >= write_chunk)
break; /* We've done our duty */
- schedule_timeout_interruptible(pause);
+ __set_current_state(TASK_INTERRUPTIBLE);
+ io_schedule_timeout(pause);
/*
* Increase the delay for each loop, up to our previous
diff --git a/mm/percpu.c b/mm/percpu.c
index 4a048abad043..6af78c1ee704 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1870,13 +1870,14 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, ssize_t dyn_size,
max_distance = 0;
for (group = 0; group < ai->nr_groups; group++) {
ai->groups[group].base_offset = areas[group] - base;
- max_distance = max(max_distance, ai->groups[group].base_offset);
+ max_distance = max_t(size_t, max_distance,
+ ai->groups[group].base_offset);
}
max_distance += ai->unit_size;
/* warn if maximum distance is further than 75% of vmalloc space */
if (max_distance > (VMALLOC_END - VMALLOC_START) * 3 / 4) {
- pr_warning("PERCPU: max_distance=0x%lx too large for vmalloc "
+ pr_warning("PERCPU: max_distance=0x%zx too large for vmalloc "
"space 0x%lx\n",
max_distance, VMALLOC_END - VMALLOC_START);
#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 4de7f02f820b..a1bc6b9af9a2 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1974,12 +1974,14 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
goto bad_swap;
}
- if (blk_queue_nonrot(bdev_get_queue(p->bdev))) {
- p->flags |= SWP_SOLIDSTATE;
- p->cluster_next = 1 + (random32() % p->highest_bit);
+ if (p->bdev) {
+ if (blk_queue_nonrot(bdev_get_queue(p->bdev))) {
+ p->flags |= SWP_SOLIDSTATE;
+ p->cluster_next = 1 + (random32() % p->highest_bit);
+ }
+ if (discard_swap(p) == 0)
+ p->flags |= SWP_DISCARDABLE;
}
- if (discard_swap(p) == 0)
- p->flags |= SWP_DISCARDABLE;
mutex_lock(&swapon_mutex);
spin_lock(&swap_lock);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 69511e663234..0f551a4a44cd 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -12,6 +12,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/highmem.h>
+#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
@@ -25,10 +26,10 @@
#include <linux/rcupdate.h>
#include <linux/pfn.h>
#include <linux/kmemleak.h>
-#include <linux/highmem.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
#include <asm/tlbflush.h>
+#include <asm/shmparam.h>
/*** Page table manipulation functions ***/
@@ -1156,12 +1157,11 @@ static void insert_vmalloc_vm(struct vm_struct *vm, struct vmap_area *va,
}
static struct vm_struct *__get_vm_area_node(unsigned long size,
- unsigned long flags, unsigned long start, unsigned long end,
- int node, gfp_t gfp_mask, void *caller)
+ unsigned long align, unsigned long flags, unsigned long start,
+ unsigned long end, int node, gfp_t gfp_mask, void *caller)
{
static struct vmap_area *va;
struct vm_struct *area;
- unsigned long align = 1;
BUG_ON(in_interrupt());
if (flags & VM_IOREMAP) {
@@ -1201,7 +1201,7 @@ static struct vm_struct *__get_vm_area_node(unsigned long size,
struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end)
{
- return __get_vm_area_node(size, flags, start, end, -1, GFP_KERNEL,
+ return __get_vm_area_node(size, 1, flags, start, end, -1, GFP_KERNEL,
__builtin_return_address(0));
}
EXPORT_SYMBOL_GPL(__get_vm_area);
@@ -1210,7 +1210,7 @@ struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end,
void *caller)
{
- return __get_vm_area_node(size, flags, start, end, -1, GFP_KERNEL,
+ return __get_vm_area_node(size, 1, flags, start, end, -1, GFP_KERNEL,
caller);
}
@@ -1225,22 +1225,22 @@ struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
*/
struct vm_struct *get_vm_area(unsigned long size, unsigned long flags)
{
- return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END,
+ return __get_vm_area_node(size, 1, flags, VMALLOC_START, VMALLOC_END,
-1, GFP_KERNEL, __builtin_return_address(0));
}
struct vm_struct *get_vm_area_caller(unsigned long size, unsigned long flags,
void *caller)
{
- return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END,
+ return __get_vm_area_node(size, 1, flags, VMALLOC_START, VMALLOC_END,
-1, GFP_KERNEL, caller);
}
struct vm_struct *get_vm_area_node(unsigned long size, unsigned long flags,
int node, gfp_t gfp_mask)
{
- return __get_vm_area_node(size, flags, VMALLOC_START, VMALLOC_END, node,
- gfp_mask, __builtin_return_address(0));
+ return __get_vm_area_node(size, 1, flags, VMALLOC_START, VMALLOC_END,
+ node, gfp_mask, __builtin_return_address(0));
}
static struct vm_struct *find_vm_area(const void *addr)
@@ -1403,7 +1403,8 @@ void *vmap(struct page **pages, unsigned int count,
}
EXPORT_SYMBOL(vmap);
-static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
+static void *__vmalloc_node(unsigned long size, unsigned long align,
+ gfp_t gfp_mask, pgprot_t prot,
int node, void *caller);
static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot, int node, void *caller)
@@ -1417,7 +1418,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
area->nr_pages = nr_pages;
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
- pages = __vmalloc_node(array_size, gfp_mask | __GFP_ZERO,
+ pages = __vmalloc_node(array_size, 1, gfp_mask | __GFP_ZERO,
PAGE_KERNEL, node, caller);
area->flags |= VM_VPAGES;
} else {
@@ -1476,6 +1477,7 @@ void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot)
/**
* __vmalloc_node - allocate virtually contiguous memory
* @size: allocation size
+ * @align: desired alignment
* @gfp_mask: flags for the page level allocator
* @prot: protection mask for the allocated pages
* @node: node to use for allocation or -1
@@ -1485,8 +1487,9 @@ void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask, pgprot_t prot)
* allocator with @gfp_mask flags. Map them into contiguous
* kernel virtual space, using a pagetable protection of @prot.
*/
-static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
- int node, void *caller)
+static void *__vmalloc_node(unsigned long size, unsigned long align,
+ gfp_t gfp_mask, pgprot_t prot,
+ int node, void *caller)
{
struct vm_struct *area;
void *addr;
@@ -1496,8 +1499,8 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
if (!size || (size >> PAGE_SHIFT) > totalram_pages)
return NULL;
- area = __get_vm_area_node(size, VM_ALLOC, VMALLOC_START, VMALLOC_END,
- node, gfp_mask, caller);
+ area = __get_vm_area_node(size, align, VM_ALLOC, VMALLOC_START,
+ VMALLOC_END, node, gfp_mask, caller);
if (!area)
return NULL;
@@ -1516,7 +1519,7 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
{
- return __vmalloc_node(size, gfp_mask, prot, -1,
+ return __vmalloc_node(size, 1, gfp_mask, prot, -1,
__builtin_return_address(0));
}
EXPORT_SYMBOL(__vmalloc);
@@ -1532,7 +1535,7 @@ EXPORT_SYMBOL(__vmalloc);
*/
void *vmalloc(unsigned long size)
{
- return __vmalloc_node(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL,
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL,
-1, __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc);
@@ -1549,7 +1552,8 @@ void *vmalloc_user(unsigned long size)
struct vm_struct *area;
void *ret;
- ret = __vmalloc_node(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
+ ret = __vmalloc_node(size, SHMLBA,
+ GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
PAGE_KERNEL, -1, __builtin_return_address(0));
if (ret) {
area = find_vm_area(ret);
@@ -1572,7 +1576,7 @@ EXPORT_SYMBOL(vmalloc_user);
*/
void *vmalloc_node(unsigned long size, int node)
{
- return __vmalloc_node(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL,
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL,
node, __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc_node);
@@ -1595,7 +1599,7 @@ EXPORT_SYMBOL(vmalloc_node);
void *vmalloc_exec(unsigned long size)
{
- return __vmalloc_node(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL_EXEC,
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL_EXEC,
-1, __builtin_return_address(0));
}
@@ -1616,7 +1620,7 @@ void *vmalloc_exec(unsigned long size)
*/
void *vmalloc_32(unsigned long size)
{
- return __vmalloc_node(size, GFP_VMALLOC32, PAGE_KERNEL,
+ return __vmalloc_node(size, 1, GFP_VMALLOC32, PAGE_KERNEL,
-1, __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc_32);
@@ -1633,7 +1637,7 @@ void *vmalloc_32_user(unsigned long size)
struct vm_struct *area;
void *ret;
- ret = __vmalloc_node(size, GFP_VMALLOC32 | __GFP_ZERO, PAGE_KERNEL,
+ ret = __vmalloc_node(size, 1, GFP_VMALLOC32 | __GFP_ZERO, PAGE_KERNEL,
-1, __builtin_return_address(0));
if (ret) {
area = find_vm_area(ret);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 19:36:18 +0000