/* The number of rmap_items in use: to calculate pages_volatile */
static unsigned long ksm_rmap_items;
-/* Limit on the number of unswappable pages used */
-static unsigned long ksm_max_kernel_pages;
-
/* Number of pages ksmd should scan in one batch */
static unsigned int ksm_thread_pages_to_scan = 100;
{
int err;
- /*
- * The number of nodes in the stable tree
- * is the number of kernel pages that we hold.
- */
- if (ksm_max_kernel_pages &&
- ksm_max_kernel_pages <= ksm_pages_shared)
- return NULL;
-
err = try_to_merge_with_ksm_page(rmap_item, page, NULL);
if (!err) {
err = try_to_merge_with_ksm_page(tree_rmap_item,
again:
hlist_for_each_entry(rmap_item, hlist, &stable_node->hlist, hlist) {
struct anon_vma *anon_vma = rmap_item->anon_vma;
+ struct anon_vma_chain *vmac;
struct vm_area_struct *vma;
spin_lock(&anon_vma->lock);
- list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
+ list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) {
+ vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
rmap_item->address >= vma->vm_end)
continue;
again:
hlist_for_each_entry(rmap_item, hlist, &stable_node->hlist, hlist) {
struct anon_vma *anon_vma = rmap_item->anon_vma;
+ struct anon_vma_chain *vmac;
struct vm_area_struct *vma;
spin_lock(&anon_vma->lock);
- list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
+ list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) {
+ vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
rmap_item->address >= vma->vm_end)
continue;
again:
hlist_for_each_entry(rmap_item, hlist, &stable_node->hlist, hlist) {
struct anon_vma *anon_vma = rmap_item->anon_vma;
+ struct anon_vma_chain *vmac;
struct vm_area_struct *vma;
spin_lock(&anon_vma->lock);
- list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
+ list_for_each_entry(vmac, &anon_vma->head, same_anon_vma) {
+ vma = vmac->vma;
if (rmap_item->address < vma->vm_start ||
rmap_item->address >= vma->vm_end)
continue;
/*
* KSM_RUN_MERGE sets ksmd running, and 0 stops it running.
* KSM_RUN_UNMERGE stops it running and unmerges all rmap_items,
- * breaking COW to free the unswappable pages_shared (but leaves
- * mm_slots on the list for when ksmd may be set running again).
+ * breaking COW to free the pages_shared (but leaves mm_slots
+ * on the list for when ksmd may be set running again).
*/
mutex_lock(&ksm_thread_mutex);
}
KSM_ATTR(run);
-static ssize_t max_kernel_pages_store(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t count)
-{
- int err;
- unsigned long nr_pages;
-
- err = strict_strtoul(buf, 10, &nr_pages);
- if (err)
- return -EINVAL;
-
- ksm_max_kernel_pages = nr_pages;
-
- return count;
-}
-
-static ssize_t max_kernel_pages_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return sprintf(buf, "%lu\n", ksm_max_kernel_pages);
-}
-KSM_ATTR(max_kernel_pages);
-
static ssize_t pages_shared_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
&sleep_millisecs_attr.attr,
&pages_to_scan_attr.attr,
&run_attr.attr,
- &max_kernel_pages_attr.attr,
&pages_shared_attr.attr,
&pages_sharing_attr.attr,
&pages_unshared_attr.attr,
struct task_struct *ksm_thread;
int err;
- ksm_max_kernel_pages = totalram_pages / 4;
-
err = ksm_slab_init();
if (err)
goto out;