From: Changbin Du <changbin.du@xxxxxxxxx> Subject: tools/vm/page-types: remove dependency on opt_file for idle page tracking 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 .... 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> --- tools/vm/page-types.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/vm/page-types.c~tools-vm-page-types-remove-dependency-on-opt_file-for-idle-page-tracking +++ a/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) _
