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/* process to walk */=0A= const char *opt_file; /* file or directory path */=0A= static uint64_t opt_cgroup; /* cgroup inode */=0A= static int opt_list_cgroup;/* list page cgroup */=0A= +static int opt_real_cgroup;/* list page cgroup */=0A= static int opt_list_mapcnt;/* list page map count */=0A= static const char *opt_kpageflags;/* kpageflags file to parse */=0A= =0A= @@ -837,6 +838,7 @@ static void usage(void)=0A= " -l|--list Show page details in ranges\n"=0A= " -L|--list-each Show page details one by one\n"=0A= " -C|--list-cgroup Show cgroup inode for pages\n"=0A= +" -R|--real-cgroup Show real offline cgroups\n"=0A= " -M|--list-mapcnt Show page map count\n"=0A= " -N|--no-summary Don't show summary info\n"=0A= " -X|--hwpoison hwpoison pages\n"=0A= @@ -1257,6 +1259,7 @@ static const struct option opts[] =3D {=0A= { "list" , 0, NULL, 'l' },=0A= { "list-each" , 0, NULL, 'L' },=0A= { "list-cgroup", 0, NULL, 'C' },=0A= + { "real-cgroup", 0, NULL, 'R' },=0A= { "list-mapcnt", 0, NULL, 'M' },=0A= { "no-summary", 0, NULL, 'N' },=0A= { "hwpoison" , 0, NULL, 'X' },=0A= @@ -1273,7 +1276,7 @@ int main(int argc, char *argv[])=0A= page_size =3D getpagesize();=0A= =0A= while ((c =3D getopt_long(argc, argv,=0A= - "rp:f:a:b:d:c:CilLMNXxF:h",=0A= + "rp:f:a:b:d:c:CRilLMNXxF:h",=0A= opts, NULL)) !=3D -1) {=0A= switch (c) {=0A= case 'r':=0A= @@ -1297,6 +1300,9 @@ int main(int argc, char *argv[])=0A= case 'C':=0A= opt_list_cgroup =3D 1;=0A= break;=0A= + case 'R':=0A= + opt_real_cgroup =3D 1;=0A= + break;=0A= case 'd':=0A= describe_flags(optarg);=0A= exit(0);=0A= @@ -1338,7 +1344,15 @@ int main(int argc, char *argv[])=0A= if (!opt_kpageflags)=0A= opt_kpageflags =3D PROC_KPAGEFLAGS;=0A= =0A= - if (opt_cgroup || opt_list_cgroup)=0A= + if (opt_real_cgroup) {=0A= + uint64_t flags =3D 1;=0A= +=0A= + kpagecgroup_fd =3D checked_open(PROC_KPAGECGROUP, O_RDWR);=0A= + if (write(kpagecgroup_fd, &flags, sizeof(flags)) < 0) {=0A= + perror(PROC_KPAGECGROUP);=0A= + exit(EXIT_FAILURE);=0A= + }=0A= + } else if (opt_cgroup || opt_list_cgroup)=0A= kpagecgroup_fd =3D checked_open(PROC_KPAGECGROUP, O_RDONLY);=0A= =0A= if (opt_list && opt_list_mapcnt)=0A= -- =0A= 2.25.1=0A= =0A=