Add "-U" option to show unreclaimable slabs only.
"-U" and "-S" together can tell us what unreclaimable slabs use the most
memory to help debug huge unreclaimable slabs issue.
Signed-off-by: Yang Shi <yan...@alibaba-inc.com>
Acked-by: Christoph Lameter <c...@linux.com>
Acked-by: David Rientjes <rient...@google.com>
---
tools/vm/slabinfo.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
index b9d34b3..de8fa11 100644
--- a/tools/vm/slabinfo.c
+++ b/tools/vm/slabinfo.c
@@ -83,6 +83,7 @@ struct aliasinfo {
int sort_loss;
int extended_totals;
int show_bytes;
+int unreclaim_only;
/* Debug options */
int sanity;
@@ -132,6 +133,7 @@ static void usage(void)
"-L|--Loss Sort by loss\n"
"-X|--Xtotals Show extended summary information\n"
"-B|--Bytes Show size in bytes\n"
+ "-U|--Unreclaim Show unreclaimable slabs only\n"
"\nValid debug options (FZPUT may be combined)\n"
"a / A Switch on all debug options (=FZUP)\n"
"- Switch off all debug options\n"
@@ -568,6 +570,9 @@ static void slabcache(struct slabinfo *s)
if (strcmp(s->name, "*") == 0)
return;
+ if (unreclaim_only && s->reclaim_account)
+ return;
+
if (actual_slabs == 1) {
report(s);
return;
@@ -1346,6 +1351,7 @@ struct option opts[] = {
{ "Loss", no_argument, NULL, 'L'},
{ "Xtotals", no_argument, NULL, 'X'},
{ "Bytes", no_argument, NULL, 'B'},
+ { "Unreclaim", no_argument, NULL, 'U'},
{ NULL, 0, NULL, 0 }
};
@@ -1357,7 +1363,7 @@ int main(int argc, char *argv[])
page_size = getpagesize();
- while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXB",
+ while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXBU",
opts, NULL)) != -1)
switch (c) {
case '1':
@@ -1438,6 +1444,9 @@ int main(int argc, char *argv[])
case 'B':
show_bytes = 1;
break;
+ case 'U':
+ unreclaim_only = 1;
+ break;
default:
fatal("%s: Invalid option '%c'\n", argv[0], optopt);
--
1.8.3.1
