diff options
| -rw-r--r-- | fs/proc/base.c | 15 | ||||
| -rw-r--r-- | include/linux/mm_types.h | 5 | ||||
| -rw-r--r-- | mm/ksm.c | 2 |
3 files changed, 22 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 12885a75913f..ca3e836377e8 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3199,6 +3199,19 @@ static int proc_pid_ksm_merging_pages(struct seq_file *m, struct pid_namespace * return 0; } +static int proc_pid_ksm_stat(struct seq_file *m, struct pid_namespace *ns, + struct pid *pid, struct task_struct *task) +{ + struct mm_struct *mm; + + mm = get_task_mm(task); + if (mm) { + seq_printf(m, "ksm_rmap_items %lu\n", mm->ksm_rmap_items); + mmput(mm); + } + + return 0; +} #endif /* CONFIG_KSM */ #ifdef CONFIG_STACKLEAK_METRICS @@ -3334,6 +3347,7 @@ static const struct pid_entry tgid_base_stuff[] = { #endif #ifdef CONFIG_KSM ONE("ksm_merging_pages", S_IRUSR, proc_pid_ksm_merging_pages), + ONE("ksm_stat", S_IRUSR, proc_pid_ksm_stat), #endif }; @@ -3671,6 +3685,7 @@ static const struct pid_entry tid_base_stuff[] = { #endif #ifdef CONFIG_KSM ONE("ksm_merging_pages", S_IRUSR, proc_pid_ksm_merging_pages), + ONE("ksm_stat", S_IRUSR, proc_pid_ksm_stat), #endif }; diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 26573ba485f3..8f30f262431c 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -654,6 +654,11 @@ struct mm_struct { * merging. */ unsigned long ksm_merging_pages; + /* + * Represent how many pages are checked for ksm merging + * including merged and not merged. + */ + unsigned long ksm_rmap_items; #endif #ifdef CONFIG_LRU_GEN struct { @@ -387,6 +387,7 @@ static inline struct rmap_item *alloc_rmap_item(void) static inline void free_rmap_item(struct rmap_item *rmap_item) { ksm_rmap_items--; + rmap_item->mm->ksm_rmap_items--; rmap_item->mm = NULL; /* debug safety */ kmem_cache_free(rmap_item_cache, rmap_item); } @@ -2235,6 +2236,7 @@ static struct rmap_item *get_next_rmap_item(struct mm_slot *mm_slot, if (rmap_item) { /* It has already been zeroed */ rmap_item->mm = mm_slot->mm; + rmap_item->mm->ksm_rmap_items++; rmap_item->address = addr; rmap_item->rmap_list = *rmap_list; *rmap_list = rmap_item; |