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https://github.com/torvalds/linux
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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: Sergey 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -79,6 +79,7 @@ int sort_active = 0;
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int set_debug = 0;
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int show_ops = 0;
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int show_activity = 0;
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int output_lines = -1;
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/* Debug options */
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int sanity = 0;
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@ -124,6 +125,7 @@ static void usage(void)
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"-v|--validate Validate slabs\n"
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"-z|--zero Include empty slabs\n"
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"-1|--1ref Single reference\n"
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"-N|--lines=K Show the first K slabs\n"
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"\nValid debug options (FZPUT may be combined)\n"
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"a / A Switch on all debug options (=FZUP)\n"
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"- Switch off all debug options\n"
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@ -1242,11 +1244,14 @@ static void output_slabs(void)
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{
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struct slabinfo *slab;
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for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
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for (slab = slabinfo; (slab < slabinfo + slabs) &&
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output_lines != 0; slab++) {
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if (slab->alias)
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continue;
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if (output_lines != -1)
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output_lines--;
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if (show_numa)
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slab_numa(slab, 0);
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@ -1285,6 +1290,7 @@ struct option opts[] = {
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{ "validate", no_argument, NULL, 'v' },
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{ "zero", no_argument, NULL, 'z' },
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{ "1ref", no_argument, NULL, '1'},
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{ "lines", required_argument, NULL, 'N'},
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{ NULL, 0, NULL, 0 }
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};
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@ -1296,7 +1302,7 @@ int main(int argc, char *argv[])
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page_size = getpagesize();
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while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
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while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:",
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opts, NULL)) != -1)
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switch (c) {
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case '1':
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@ -1358,7 +1364,13 @@ int main(int argc, char *argv[])
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case 'S':
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sort_size = 1;
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break;
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case 'N':
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if (optarg) {
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output_lines = atoi(optarg);
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if (output_lines < 1)
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output_lines = 1;
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}
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break;
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default:
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fatal("%s: Invalid option '%c'\n", argv[0], optopt);
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