diff options
Diffstat (limited to 'mm/ksm.c')
| -rw-r--r-- | mm/ksm.c | 13 |
1 files changed, 10 insertions, 3 deletions
@@ -30,6 +30,7 @@ #include <linux/slab.h> #include <linux/rbtree.h> #include <linux/mmu_notifier.h> +#include <linux/swap.h> #include <linux/ksm.h> #include <asm/tlbflush.h> @@ -162,10 +163,10 @@ static unsigned long ksm_pages_unshared; static unsigned long ksm_rmap_items; /* Limit on the number of unswappable pages used */ -static unsigned long ksm_max_kernel_pages = 2000; +static unsigned long ksm_max_kernel_pages; /* Number of pages ksmd should scan in one batch */ -static unsigned int ksm_thread_pages_to_scan = 200; +static unsigned int ksm_thread_pages_to_scan = 100; /* Milliseconds ksmd should sleep between batches */ static unsigned int ksm_thread_sleep_millisecs = 20; @@ -173,7 +174,7 @@ static unsigned int ksm_thread_sleep_millisecs = 20; #define KSM_RUN_STOP 0 #define KSM_RUN_MERGE 1 #define KSM_RUN_UNMERGE 2 -static unsigned int ksm_run = KSM_RUN_MERGE; +static unsigned int ksm_run = KSM_RUN_STOP; static DECLARE_WAIT_QUEUE_HEAD(ksm_thread_wait); static DEFINE_MUTEX(ksm_thread_mutex); @@ -1011,6 +1012,7 @@ static struct rmap_item *unstable_tree_search_insert(struct page *page, struct rmap_item *tree_rmap_item; int ret; + cond_resched(); tree_rmap_item = rb_entry(*new, struct rmap_item, node); page2[0] = get_mergeable_page(tree_rmap_item); if (!page2[0]) @@ -1667,6 +1669,8 @@ static int __init ksm_init(void) struct task_struct *ksm_thread; int err; + ksm_max_kernel_pages = totalram_pages / 4; + err = ksm_slab_init(); if (err) goto out; @@ -1689,6 +1693,9 @@ 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; |