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Commit 4980a963 authored by Sergey Senozhatsky's avatar Sergey Senozhatsky Committed by Linus Torvalds
Browse files

tools/vm/slabinfo: limit the number of reported slabs 



Introduce opt "-N|--lines=K" to limit the number of slabs
being reported in output_slabs().

Signed-off-by: default avatarSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2b100755

tools/vm/slabinfo.c

+15 −3
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ int sort_active = 0; 
int set_debug = 0;

int show_ops = 0;

int show_activity = 0;

int output_lines = -1;



/* Debug options */

int sanity = 0;
@@ -124,6 +125,7 @@ static void usage(void) 
		"-v|--validate          Validate slabs\n"

		"-z|--zero              Include empty slabs\n"

		"-1|--1ref              Single reference\n"

		"-N|--lines=K           Show the first K slabs\n"

		"\nValid debug options (FZPUT may be combined)\n"

		"a / A          Switch on all debug options (=FZUP)\n"

		"-              Switch off all debug options\n"
@@ -1242,11 +1244,14 @@ static void output_slabs(void) 
{

	struct slabinfo *slab;



	for (slab = slabinfo; slab < slabinfo + slabs; slab++) {

	for (slab = slabinfo; (slab < slabinfo + slabs) &&

			output_lines != 0; slab++) {



		if (slab->alias)

			continue;



		if (output_lines != -1)

			output_lines--;



		if (show_numa)

			slab_numa(slab, 0);
@@ -1285,6 +1290,7 @@ struct option opts[] = { 
	{ "validate", no_argument, NULL, 'v' },

	{ "zero", no_argument, NULL, 'z' },

	{ "1ref", no_argument, NULL, '1'},

	{ "lines", required_argument, NULL, 'N'},

	{ NULL, 0, NULL, 0 }

};
@@ -1296,7 +1302,7 @@ int main(int argc, char *argv[]) 


	page_size = getpagesize();



	while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",

	while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:",

						opts, NULL)) != -1)

		switch (c) {

		case '1':
@@ -1358,7 +1364,13 @@ int main(int argc, char *argv[]) 
		case 'S':

			sort_size = 1;

			break;



		case 'N':

			if (optarg) {

				output_lines = atoi(optarg);

				if (output_lines < 1)

					output_lines = 1;

			}

			break;

		default:

			fatal("%s: Invalid option '%c'\n", argv[0], optopt);