With flag -R|--real-cgroup page-types will report real owner. Link: https://lore.kernel.org/lkml/153414349419.737150.8224164787883146532.stgit@buzz Suggested-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx> Reviewed-by: Andrey Ryabinin <arbn@xxxxxxxxxxxxxxx> Signed-off-by: Dmitry Yakunin <zeil@xxxxxxxxxx> --- tools/mm/page-types.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/tools/mm/page-types.c b/tools/mm/page-types.c index 8d5595b6c59f..f26035b362d2 100644 --- a/tools/mm/page-types.c +++ b/tools/mm/page-types.c @@ -161,6 +161,7 @@ static pid_t opt_pid; /* process to walk */ const char *opt_file; /* file or directory path */ static uint64_t opt_cgroup; /* cgroup inode */ static int opt_list_cgroup;/* list page cgroup */ +static int opt_real_cgroup;/* list page cgroup */ static int opt_list_mapcnt;/* list page map count */ static const char *opt_kpageflags;/* kpageflags file to parse */ @@ -837,6 +838,7 @@ static void usage(void) " -l|--list Show page details in ranges\n" " -L|--list-each Show page details one by one\n" " -C|--list-cgroup Show cgroup inode for pages\n" +" -R|--real-cgroup Show real offline cgroups\n" " -M|--list-mapcnt Show page map count\n" " -N|--no-summary Don't show summary info\n" " -X|--hwpoison hwpoison pages\n" @@ -1257,6 +1259,7 @@ static const struct option opts[] = { { "list" , 0, NULL, 'l' }, { "list-each" , 0, NULL, 'L' }, { "list-cgroup", 0, NULL, 'C' }, + { "real-cgroup", 0, NULL, 'R' }, { "list-mapcnt", 0, NULL, 'M' }, { "no-summary", 0, NULL, 'N' }, { "hwpoison" , 0, NULL, 'X' }, @@ -1273,7 +1276,7 @@ int main(int argc, char *argv[]) page_size = getpagesize(); while ((c = getopt_long(argc, argv, - "rp:f:a:b:d:c:CilLMNXxF:h", + "rp:f:a:b:d:c:CRilLMNXxF:h", opts, NULL)) != -1) { switch (c) { case 'r': @@ -1297,6 +1300,9 @@ int main(int argc, char *argv[]) case 'C': opt_list_cgroup = 1; break; + case 'R': + opt_real_cgroup = 1; + break; case 'd': describe_flags(optarg); exit(0); @@ -1338,7 +1344,15 @@ int main(int argc, char *argv[]) if (!opt_kpageflags) opt_kpageflags = PROC_KPAGEFLAGS; - if (opt_cgroup || opt_list_cgroup) + if (opt_real_cgroup) { + uint64_t flags = 1; + + kpagecgroup_fd = checked_open(PROC_KPAGECGROUP, O_RDWR); + if (write(kpagecgroup_fd, &flags, sizeof(flags)) < 0) { + perror(PROC_KPAGECGROUP); + exit(EXIT_FAILURE); + } + } else if (opt_cgroup || opt_list_cgroup) kpagecgroup_fd = checked_open(PROC_KPAGECGROUP, O_RDONLY); if (opt_list && opt_list_mapcnt) -- 2.25.1
