From: xu xin <xu.xin16@xxxxxxxxxx> In /proc/<pid>/ksm_stat, Add two extra ksm involvement items including MMF_VM_MERGEABLE and MMF_VM_MERGE_ANY. It helps administrators to better know the system's KSM behavior at process level. KSM_mergeable: yes/no whether the process'mm is added by madvise() into the candidate list of KSM or not. KSM_merge_any: yes/no whether the process'mm is added by prctl() into the candidate list of KSM or not, and fully enabled at process level. Changelog ========= v1 -> v2: replace the internal flag names with straightforward strings. * MMF_VM_MERGEABLE -> KSM_mergeable * MMF_VM_MERGE_ANY -> KSM_merge_any Signed-off-by: xu xin <xu.xin16@xxxxxxxxxx> --- fs/proc/base.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/proc/base.c b/fs/proc/base.c index 18550c071d71..50e808ffcda4 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -3217,6 +3217,10 @@ static int proc_pid_ksm_stat(struct seq_file *m, struct pid_namespace *ns, seq_printf(m, "ksm_zero_pages %lu\n", mm->ksm_zero_pages); seq_printf(m, "ksm_merging_pages %lu\n", mm->ksm_merging_pages); seq_printf(m, "ksm_process_profit %ld\n", ksm_process_profit(mm)); + seq_printf(m, "KSM_mergeable: %s\n", + test_bit(MMF_VM_MERGEABLE, &mm->flags) ? "yes" : "no"); + seq_printf(m, "KSM_merge_any: %s\n", + test_bit(MMF_VM_MERGE_ANY, &mm->flags) ? "yes" : "no"); mmput(mm); } -- 2.15.2
