From: Changbin Du <changbin.du@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Changbin Du <changbin.du@gmail.com>
Subject: [PATCH] tools/vm/page-types: remove dependency on opt_file for idle page tracking
Date: Fri, 17 Sep 2021 11:28:26 +0800 [thread overview]
Message-ID: <20210917032826.10669-1-changbin.du@gmail.com> (raw)
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
mark page idle: Bad file descriptor
mark page idle: Bad file descriptor
....
Signed-off-by: Changbin Du <changbin.du@gmail.com>
---
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)
--
2.32.0
reply other threads:[~2021-09-17 3:28 UTC|newest]
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