From 7d434c5f4687f31201f87c24e7f3a5efb277896e Mon Sep 17 00:00:00 2001
From: Changbin Du <changbin.du@gmail.com>
Date: Fri, 24 Sep 2021 15:43:41 -0700
Subject: [PATCH] tools/vm/page-types: remove dependency on opt_file for idle page tracking
Git-commit: ebaeab2fe87987cef28eb5ab174c42cd28594387
Patch-mainline: v5.15-rc3
References: stable-5.14.11
[ Upstream commit ebaeab2fe87987cef28eb5ab174c42cd28594387 ]
Idle page tracking can also be used for process address space, not only
file mappings.
Without this change, using with '-i' option for process address space
encounters below errors reported.
$ sudo ./page-types -p $(pidof bash) -i
mark page idle: Bad file descriptor
mark page idle: Bad file descriptor
mark page idle: Bad file descriptor
mark page idle: Bad file descriptor
...
Link: https://lkml.kernel.org/r/20210917032826.10669-1-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
tools/vm/page-types.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/vm/page-types.c b/tools/vm/page-types.c
index 0517c744b04e..f62f10c988db 100644
--- a/tools/vm/page-types.c
+++ b/tools/vm/page-types.c
@@ -1331,7 +1331,7 @@ int main(int argc, char *argv[])
if (opt_list && opt_list_mapcnt)
kpagecount_fd = checked_open(PROC_KPAGECOUNT, O_RDONLY);
- if (opt_mark_idle && opt_file)
+ if (opt_mark_idle)
page_idle_fd = checked_open(SYS_KERNEL_MM_PAGE_IDLE, O_RDWR);
if (opt_list && opt_pid)
--
2.26.2