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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/tools/vm/slabinfo.c
....@@ -79,6 +79,7 @@
7979 int sort_active;
8080 int set_debug;
8181 int show_ops;
82
+int sort_partial;
8283 int show_activity;
8384 int output_lines = -1;
8485 int sort_loss;
....@@ -110,39 +111,45 @@
110111 static void usage(void)
111112 {
112113 	printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
113
-		"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
114
+		"slabinfo [-aABDefhilLnoPrsStTUvXz1] [N=K] [-dafzput] [slab-regexp]\n"
114115 		"-a|--aliases           Show aliases\n"
115116 		"-A|--activity          Most active slabs first\n"
116
-		"-d<options>|--debug=<options> Set/Clear Debug options\n"
117
+		"-B|--Bytes             Show size in bytes\n"
117118 		"-D|--display-active    Switch line format to activity\n"
118119 		"-e|--empty             Show empty slabs\n"
119120 		"-f|--first-alias       Show first alias\n"
120121 		"-h|--help              Show usage information\n"
121122 		"-i|--inverted          Inverted list\n"
122123 		"-l|--slabs             Show slabs\n"
124
+		"-L|--Loss              Sort by loss\n"
123125 		"-n|--numa              Show NUMA information\n"
124
-		"-o|--ops		Show kmem_cache_ops\n"
126
+		"-N|--lines=K           Show the first K slabs\n"
127
+		"-o|--ops               Show kmem_cache_ops\n"
128
+		"-P|--partial           Sort by number of partial slabs\n"
129
+		"-r|--report            Detailed report on single slabs\n"
125130 		"-s|--shrink            Shrink slabs\n"
126
-		"-r|--report		Detailed report on single slabs\n"
127131 		"-S|--Size              Sort by size\n"
128132 		"-t|--tracking          Show alloc/free information\n"
129133 		"-T|--Totals            Show summary information\n"
134
+		"-U|--Unreclaim         Show unreclaimable slabs only\n"
130135 		"-v|--validate          Validate slabs\n"
136
+		"-X|--Xtotals           Show extended summary information\n"
131137 		"-z|--zero              Include empty slabs\n"
132138 		"-1|--1ref              Single reference\n"
133
-		"-N|--lines=K           Show the first K slabs\n"
134
-		"-L|--Loss              Sort by loss\n"
135
-		"-X|--Xtotals           Show extended summary information\n"
136
-		"-B|--Bytes             Show size in bytes\n"
137
-		"-U|--Unreclaim		Show unreclaimable slabs only\n"
138
-		"\nValid debug options (FZPUT may be combined)\n"
139
-		"a / A          Switch on all debug options (=FZUP)\n"
140
-		"-              Switch off all debug options\n"
141
-		"f / F          Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
142
-		"z / Z          Redzoning\n"
143
-		"p / P          Poisoning\n"
144
-		"u / U          Tracking\n"
145
-		"t / T          Tracing\n"
139
+
140
+		"\n"
141
+		"-d  | --debug          Switch off all debug options\n"
142
+		"-da | --debug=a        Switch on all debug options (--debug=FZPU)\n"
143
+
144
+		"\n"
145
+		"-d[afzput] | --debug=[afzput]\n"
146
+		"    f | F              Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
147
+		"    z | Z              Redzoning\n"
148
+		"    p | P              Poisoning\n"
149
+		"    u | U              Tracking\n"
150
+		"    t | T              Tracing\n"
151
+
152
+		"\nSorting options (--Loss, --Size, --Partial) are mutually exclusive\n"
146153 	);
147154 }
148155 
....@@ -226,6 +233,24 @@
226233 	return l;
227234 }
228235 
236
+static unsigned long read_debug_slab_obj(struct slabinfo *s, const char *name)
237
+{
238
+	char x[128];
239
+	FILE *f;
240
+	size_t l;
241
+
242
+	snprintf(x, 128, "/sys/kernel/debug/slab/%s/%s", s->name, name);
243
+	f = fopen(x, "r");
244
+	if (!f) {
245
+		buffer[0] = 0;
246
+		l = 0;
247
+	} else {
248
+		l = fread(buffer, 1, sizeof(buffer), f);
249
+		buffer[l] = 0;
250
+		fclose(f);
251
+	}
252
+	return l;
253
+}
229254 
230255 /*
231256  * Put a size string together
....@@ -402,14 +427,18 @@
402427 {
403428 	printf("\n%s: Kernel object allocation\n", s->name);
404429 	printf("-----------------------------------------------------------------------\n");
405
-	if (read_slab_obj(s, "alloc_calls"))
430
+	if (read_debug_slab_obj(s, "alloc_traces"))
431
+		printf("%s", buffer);
432
+	else if (read_slab_obj(s, "alloc_calls"))
406433 		printf("%s", buffer);
407434 	else
408435 		printf("No Data\n");
409436 
410437 	printf("\n%s: Kernel object freeing\n", s->name);
411438 	printf("------------------------------------------------------------------------\n");
412
-	if (read_slab_obj(s, "free_calls"))
439
+	if (read_debug_slab_obj(s, "free_traces"))
440
+		printf("%s", buffer);
441
+	else if (read_slab_obj(s, "free_calls"))
413442 		printf("%s", buffer);
414443 	else
415444 		printf("No Data\n");
....@@ -713,11 +742,11 @@
713742 		return;
714743 
715744 	if (sanity && !s->sanity_checks) {
716
-		set_obj(s, "sanity", 1);
745
+		set_obj(s, "sanity_checks", 1);
717746 	}
718747 	if (!sanity && s->sanity_checks) {
719748 		if (slab_empty(s))
720
-			set_obj(s, "sanity", 0);
749
+			set_obj(s, "sanity_checks", 0);
721750 		else
722751 			fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
723752 	}
....@@ -1038,13 +1067,27 @@
10381067 		for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
10391068 			int result;
10401069 
1041
-			if (sort_size)
1042
-				result = slab_size(s1) < slab_size(s2);
1043
-			else if (sort_active)
1044
-				result = slab_activity(s1) < slab_activity(s2);
1045
-			else if (sort_loss)
1046
-				result = slab_waste(s1) < slab_waste(s2);
1047
-			else
1070
+			if (sort_size) {
1071
+				if (slab_size(s1) == slab_size(s2))
1072
+					result = strcasecmp(s1->name, s2->name);
1073
+				else
1074
+					result = slab_size(s1) < slab_size(s2);
1075
+			} else if (sort_active) {
1076
+				if (slab_activity(s1) == slab_activity(s2))
1077
+					result = strcasecmp(s1->name, s2->name);
1078
+				else
1079
+					result = slab_activity(s1) < slab_activity(s2);
1080
+			} else if (sort_loss) {
1081
+				if (slab_waste(s1) == slab_waste(s2))
1082
+					result = strcasecmp(s1->name, s2->name);
1083
+				else
1084
+					result = slab_waste(s1) < slab_waste(s2);
1085
+			} else if (sort_partial) {
1086
+				if (s1->partial == s2->partial)
1087
+					result = strcasecmp(s1->name, s2->name);
1088
+				else
1089
+					result = s1->partial < s2->partial;
1090
+			} else
10481091 				result = strcasecmp(s1->name, s2->name);
10491092 
10501093 			if (show_inverted)
....@@ -1304,33 +1347,46 @@
13041347 	}
13051348 }
13061349 
1350
+static void _xtotals(char *heading, char *underline,
1351
+		     int loss, int size, int partial)
1352
+{
1353
+	printf("%s%s", heading, underline);
1354
+	line = 0;
1355
+	sort_loss = loss;
1356
+	sort_size = size;
1357
+	sort_partial = partial;
1358
+	sort_slabs();
1359
+	output_slabs();
1360
+}
1361
+
13071362 static void xtotals(void)
13081363 {
1364
+	char *heading, *underline;
1365
+
13091366 	totals();
13101367 
13111368 	link_slabs();
13121369 	rename_slabs();
13131370 
1314
-	printf("\nSlabs sorted by size\n");
1315
-	printf("--------------------\n");
1316
-	sort_loss = 0;
1317
-	sort_size = 1;
1318
-	sort_slabs();
1319
-	output_slabs();
1371
+	heading = "\nSlabs sorted by size\n";
1372
+	underline = "--------------------\n";
1373
+	_xtotals(heading, underline, 0, 1, 0);
13201374 
1321
-	printf("\nSlabs sorted by loss\n");
1322
-	printf("--------------------\n");
1323
-	line = 0;
1324
-	sort_loss = 1;
1325
-	sort_size = 0;
1326
-	sort_slabs();
1327
-	output_slabs();
1375
+	heading = "\nSlabs sorted by loss\n";
1376
+	underline = "--------------------\n";
1377
+	_xtotals(heading, underline, 1, 0, 0);
1378
+
1379
+	heading = "\nSlabs sorted by number of partial slabs\n";
1380
+	underline = "---------------------------------------\n";
1381
+	_xtotals(heading, underline, 0, 0, 1);
1382
+
13281383 	printf("\n");
13291384 }
13301385 
13311386 struct option opts[] = {
13321387 	{ "aliases", no_argument, NULL, 'a' },
13331388 	{ "activity", no_argument, NULL, 'A' },
1389
+	{ "Bytes", no_argument, NULL, 'B'},
13341390 	{ "debug", optional_argument, NULL, 'd' },
13351391 	{ "display-activity", no_argument, NULL, 'D' },
13361392 	{ "empty", no_argument, NULL, 'e' },
....@@ -1338,21 +1394,21 @@
13381394 	{ "help", no_argument, NULL, 'h' },
13391395 	{ "inverted", no_argument, NULL, 'i'},
13401396 	{ "slabs", no_argument, NULL, 'l' },
1397
+	{ "Loss", no_argument, NULL, 'L'},
13411398 	{ "numa", no_argument, NULL, 'n' },
1399
+	{ "lines", required_argument, NULL, 'N'},
13421400 	{ "ops", no_argument, NULL, 'o' },
1343
-	{ "shrink", no_argument, NULL, 's' },
1401
+	{ "partial", no_argument, NULL, 'p'},
13441402 	{ "report", no_argument, NULL, 'r' },
1403
+	{ "shrink", no_argument, NULL, 's' },
13451404 	{ "Size", no_argument, NULL, 'S'},
13461405 	{ "tracking", no_argument, NULL, 't'},
13471406 	{ "Totals", no_argument, NULL, 'T'},
1407
+	{ "Unreclaim", no_argument, NULL, 'U'},
13481408 	{ "validate", no_argument, NULL, 'v' },
1409
+	{ "Xtotals", no_argument, NULL, 'X'},
13491410 	{ "zero", no_argument, NULL, 'z' },
13501411 	{ "1ref", no_argument, NULL, '1'},
1351
-	{ "lines", required_argument, NULL, 'N'},
1352
-	{ "Loss", no_argument, NULL, 'L'},
1353
-	{ "Xtotals", no_argument, NULL, 'X'},
1354
-	{ "Bytes", no_argument, NULL, 'B'},
1355
-	{ "Unreclaim", no_argument, NULL, 'U'},
13561412 	{ NULL, 0, NULL, 0 }
13571413 };
13581414 
....@@ -1364,17 +1420,17 @@
13641420 
13651421 	page_size = getpagesize();
13661422 
1367
-	while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXBU",
1423
+	while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
13681424 						opts, NULL)) != -1)
13691425 		switch (c) {
1370
-		case '1':
1371
-			show_single_ref = 1;
1372
-			break;
13731426 		case 'a':
13741427 			show_alias = 1;
13751428 			break;
13761429 		case 'A':
13771430 			sort_active = 1;
1431
+			break;
1432
+		case 'B':
1433
+			show_bytes = 1;
13781434 			break;
13791435 		case 'd':
13801436 			set_debug = 1;
....@@ -1396,35 +1452,14 @@
13961452 		case 'i':
13971453 			show_inverted = 1;
13981454 			break;
1399
-		case 'n':
1400
-			show_numa = 1;
1401
-			break;
1402
-		case 'o':
1403
-			show_ops = 1;
1404
-			break;
1405
-		case 'r':
1406
-			show_report = 1;
1407
-			break;
1408
-		case 's':
1409
-			shrink = 1;
1410
-			break;
14111455 		case 'l':
14121456 			show_slab = 1;
14131457 			break;
1414
-		case 't':
1415
-			show_track = 1;
1458
+		case 'L':
1459
+			sort_loss = 1;
14161460 			break;
1417
-		case 'v':
1418
-			validate = 1;
1419
-			break;
1420
-		case 'z':
1421
-			skip_zero = 0;
1422
-			break;
1423
-		case 'T':
1424
-			show_totals = 1;
1425
-			break;
1426
-		case 'S':
1427
-			sort_size = 1;
1461
+		case 'n':
1462
+			show_numa = 1;
14281463 			break;
14291464 		case 'N':
14301465 			if (optarg) {
....@@ -1433,8 +1468,32 @@
14331468 					output_lines = 1;
14341469 			}
14351470 			break;
1436
-		case 'L':
1437
-			sort_loss = 1;
1471
+		case 'o':
1472
+			show_ops = 1;
1473
+			break;
1474
+		case 'r':
1475
+			show_report = 1;
1476
+			break;
1477
+		case 'P':
1478
+			sort_partial = 1;
1479
+			break;
1480
+		case 's':
1481
+			shrink = 1;
1482
+			break;
1483
+		case 'S':
1484
+			sort_size = 1;
1485
+			break;
1486
+		case 't':
1487
+			show_track = 1;
1488
+			break;
1489
+		case 'T':
1490
+			show_totals = 1;
1491
+			break;
1492
+		case 'U':
1493
+			unreclaim_only = 1;
1494
+			break;
1495
+		case 'v':
1496
+			validate = 1;
14381497 			break;
14391498 		case 'X':
14401499 			if (output_lines == -1)
....@@ -1442,11 +1501,11 @@
14421501 			extended_totals = 1;
14431502 			show_bytes = 1;
14441503 			break;
1445
-		case 'B':
1446
-			show_bytes = 1;
1504
+		case 'z':
1505
+			skip_zero = 0;
14471506 			break;
1448
-		case 'U':
1449
-			unreclaim_only = 1;
1507
+		case '1':
1508
+			show_single_ref = 1;
14501509 			break;
14511510 		default:
14521511 			fatal("%s: Invalid option '%c'\n", argv[0], optopt);