| Message ID | 202404252049158858OT9IpNshMmQC1itDY1B1@zte.com.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [linux-next] ksm: add ksm involvement information for each process | expand |
On 25.04.24 14:49, xu.xin16@zte.com.cn wrote: > From: xu xin <xu.xin16@zte.com.cn> > > 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. > > MMF_VM_MERGEABLE: yes/no > whether a process'mm is added by madvise() into the candidate list > of KSM or not. > MMF_VM_MERGE_ANY: yes/no > whether a process'mm is added by prctl at process level into the > candidate list of KSM or not. > > Signed-off-by: xu xin <xu.xin16@zte.com.cn> > --- > fs/proc/base.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/fs/proc/base.c b/fs/proc/base.c > index 18550c071d71..421594b8510c 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, "MMF_VM_MERGEABLE: %s\n", > + test_bit(MMF_VM_MERGEABLE, &mm->flags) ? "yes" : "no"); > + seq_printf(m, "MMF_VM_MERGE_ANY: %s\n", > + test_bit(MMF_VM_MERGE_ANY, &mm->flags) ? "yes" : "no"); Not sure if exposing these internal flag names is appropriate. Better describe what they do.
diff --git a/fs/proc/base.c b/fs/proc/base.c index 18550c071d71..421594b8510c 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, "MMF_VM_MERGEABLE: %s\n", + test_bit(MMF_VM_MERGEABLE, &mm->flags) ? "yes" : "no"); + seq_printf(m, "MMF_VM_MERGE_ANY: %s\n", + test_bit(MMF_VM_MERGE_ANY, &mm->flags) ? "yes" : "no"); mmput(mm); }