From: Changbin Du <changbin.du@xxxxxxxxx> [ 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@xxxxxxxxx Signed-off-by: Changbin Du <changbin.du@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 58c0eab71bca..d2e836b2d16b 100644 --- a/tools/vm/page-types.c +++ b/tools/vm/page-types.c @@ -1329,7 +1329,7 @@ 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) -- 2.33.0
