With flag -R|--real-cgroup page-types will report real owner.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
---
tools/vm/page-types.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/tools/vm/page-types.c b/tools/vm/page-types.c
index cce853dca691..453dbbb9fe8b 100644
--- a/tools/vm/page-types.c
+++ b/tools/vm/page-types.c
@@ -173,6 +173,7 @@ 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;/* real offline cgroup */
static const char *opt_kpageflags;/* kpageflags file to parse */
#define MAX_ADDR_RANGES 1024
@@ -789,6 +790,7 @@ 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"
" -N|--no-summary Don't show summary info\n"
" -X|--hwpoison hwpoison pages\n"
" -x|--unpoison unpoison pages\n"
@@ -1193,6 +1195,7 @@ static const struct option opts[] = {
{ "list" , 0, NULL, 'l' },
{ "list-each" , 0, NULL, 'L' },
{ "list-cgroup", 0, NULL, 'C' },
+ { "real-cgroup", 0, NULL, 'R' },
{ "no-summary", 0, NULL, 'N' },
{ "hwpoison" , 0, NULL, 'X' },
{ "unpoison" , 0, NULL, 'x' },
@@ -1208,7 +1211,7 @@ int main(int argc, char *argv[])
page_size = getpagesize();
while ((c = getopt_long(argc, argv,
- "rp:f:a:b:d:c:ClLNXxF:h", opts, NULL)) != -1) {
+ "rp:f:a:b:d:c:CRlLNXxF:h", opts, NULL)) != -1) {
switch (c) {
case 'r':
opt_raw = 1;
@@ -1231,6 +1234,9 @@ 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);
@@ -1266,7 +1272,15 @@ 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_pid)
