[RESEND RFC PATCH v1 13/20] mm: expose ksm process profit metric in ksm_stat
From: Stefan Roesch <hidden>
Date: 2023-01-23 17:59:15
Also in:
linux-doc, linux-fsdevel, linux-mm, linux-trace-kernel, lkml
Subsystem:
filesystems (vfs and infrastructure), proc filesystem, the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
This exposes the ksm process profit metric in /proc/<pid>/ksm_stat. The documentation mentions the formula for the ksm process profit metric, however it does not calculate it. In addition the formula depends on the size of internal structures. So it makes sense to expose it. Signed-off-by: Stefan Roesch <redacted> --- fs/proc/base.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9e479d7d202b..a2b7779f76f6 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c@@ -96,6 +96,7 @@ #include <linux/time_namespace.h> #include <linux/resctrl.h> #include <linux/cn_proc.h> +#include <linux/ksm.h> #include <trace/events/oom.h> #include "internal.h" #include "fd.h"
@@ -3207,6 +3208,8 @@ static int proc_pid_ksm_stat(struct seq_file *m, struct pid_namespace *ns, mm = get_task_mm(task); if (mm) { seq_printf(m, "ksm_rmap_items %lu\n", mm->ksm_rmap_items); + seq_printf(m, "ksm_merging_pages %lu\n", mm->ksm_merging_pages); + seq_printf(m, "ksm_process_profit %ld\n", ksm_process_profit(mm)); mmput(mm); }
--
2.30.2