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Date: Tue, 19 Sep 2017 02:26:48 +0800 From: "Yang Shi" <yang.s@...baba-inc.com> To: cl@...ux.com, penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com, akpm@...ux-foundation.org, mhocko@...nel.org Cc: "Yang Shi" <yang.s@...baba-inc.com>, <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org> Subject: [PATCH 1/2] tools: slabinfo: add "-U" option to show unreclaimable slabs only 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 <yang.s@...baba-inc.com> Acked-by: Christoph Lameter <cl@...ux.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..9673190 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
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