slub: add slabinfo tool

Add the tool which gets reports about slabs to the VM documentation directory.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 943 insertions, 0 deletions

diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
new file mode 100644
index 000000000000..41710ccf3a29
--- /dev/null
+++ b/Documentation/vm/slabinfo.c
@@ -0,0 +1,943 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter <clameter@sgi.com>
+ *
+ * Compile by:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+        char *name;
+        int alias;
+        int refs;
+        int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
+        int hwcache_align, object_size, objs_per_slab;
+        int sanity_checks, slab_size, store_user, trace;
+        int order, poison, reclaim_account, red_zone;
+        unsigned long partial, objects, slabs;
+        int numa[MAX_NODES];
+        int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+struct aliasinfo {
+        char *name;
+        char *ref;
+        struct slabinfo *slab;
+} aliasinfo[MAX_ALIASES];
+
+int slabs = 0;
+int aliases = 0;
+int alias_targets = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_alias = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int show_first_alias = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_single_ref = 0;
+int show_totals = 0;
+int sort_size = 0;
+
+int page_size;
+
+regex_t pattern;
+
+void fatal(const char *x, ...)
+{
+        va_list ap;
+
+        va_start(ap, x);
+        vfprintf(stderr, x, ap);
+        va_end(ap);
+        exit(1);
+}
+
+void usage(void)
+{
+        printf("slabinfo [-ahnpvtsz] [slab-regexp]\n"
+                "-a|--aliases           Show aliases\n"
+                "-h|--help              Show usage information\n"
+                "-n|--numa              Show NUMA information\n"
+                "-s|--shrink            Shrink slabs\n"
+                "-v|--validate          Validate slabs\n"
+                "-t|--tracking          Show alloc/free information\n"
+                "-T|--Totals            Show summary information\n"
+                "-l|--slabs             Show slabs\n"
+                "-S|--Size              Sort by size\n"
+                "-z|--zero              Include empty slabs\n"
+                "-f|--first-alias       Show first alias\n"
+                "-i|--inverted          Inverted list\n"
+                "-1|--1ref              Single reference\n"
+        );
+}
+
+unsigned long read_obj(char *name)
+{
+        FILE *f = fopen(name, "r");
+
+        if (!f)
+                buffer[0] = 0;
+        else {
+                if (!fgets(buffer,sizeof(buffer), f))
+                        buffer[0] = 0;
+                fclose(f);
+                if (buffer[strlen(buffer)] == '\n')
+                        buffer[strlen(buffer)] = 0;
+        }
+        return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+unsigned long get_obj(char *name)
+{
+        if (!read_obj(name))
+                return 0;
+
+        return atol(buffer);
+}
+
+unsigned long get_obj_and_str(char *name, char **x)
+{
+        unsigned long result = 0;
+        char *p;
+
+        *x = NULL;
+
+        if (!read_obj(name)) {
+                x = NULL;
+                return 0;
+        }
+        result = strtoul(buffer, &p, 10);
+        while (*p == ' ')
+                p++;
+        if (*p)
+                *x = strdup(p);
+        return result;
+}
+
+void set_obj(struct slabinfo *s, char *name, int n)
+{
+        char x[100];
+
+        sprintf(x, "%s/%s", s->name, name);
+
+        FILE *f = fopen(x, "w");
+
+        if (!f)
+                fatal("Cannot write to %s\n", x);
+
+        fprintf(f, "%d\n", n);
+        fclose(f);
+}
+
+/*
+ * Put a size string together
+ */
+int store_size(char *buffer, unsigned long value)
+{
+        unsigned long divisor = 1;
+        char trailer = 0;
+        int n;
+
+        if (value > 1000000000UL) {
+                divisor = 100000000UL;
+                trailer = 'G';
+        } else if (value > 1000000UL) {
+                divisor = 100000UL;
+                trailer = 'M';
+        } else if (value > 1000UL) {
+                divisor = 100;
+                trailer = 'K';
+        }
+
+        value /= divisor;
+        n = sprintf(buffer, "%ld",value);
+        if (trailer) {
+                buffer[n] = trailer;
+                n++;
+                buffer[n] = 0;
+        }
+        if (divisor != 1) {
+                memmove(buffer + n - 2, buffer + n - 3, 4);
+                buffer[n-2] = '.';
+                n++;
+        }
+        return n;
+}
+
+void decode_numa_list(int *numa, char *t)
+{
+        int node;
+        int nr;
+
+        memset(numa, 0, MAX_NODES * sizeof(int));
+
+        while (*t == 'N') {
+                t++;
+                node = strtoul(t, &t, 10);
+                if (*t == '=') {
+                        t++;
+                        nr = strtoul(t, &t, 10);
+                        numa[node] = nr;
+                        if (node > highest_node)
+                                highest_node = node;
+                }
+                while (*t == ' ')
+                        t++;
+        }
+}
+
+void slab_validate(struct slabinfo *s)
+{
+        set_obj(s, "validate", 1);
+}
+
+void slab_shrink(struct slabinfo *s)
+{
+        set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+void first_line(void)
+{
+        printf("Name                 Objects   Objsize    Space "
+                "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
+}
+
+/*
+ * Find the shortest alias of a slab
+ */
+struct aliasinfo *find_one_alias(struct slabinfo *find)
+{
+        struct aliasinfo *a;
+        struct aliasinfo *best = NULL;
+
+        for(a = aliasinfo;a < aliasinfo + aliases; a++) {
+                if (a->slab == find &&
+                        (!best || strlen(best->name) < strlen(a->name))) {
+                                best = a;
+                                if (strncmp(a->name,"kmall", 5) == 0)
+                                        return best;
+                        }
+        }
+        if (best)
+                return best;
+        fatal("Cannot find alias for %s\n", find->name);
+        return NULL;
+}
+
+unsigned long slab_size(struct slabinfo *s)
+{
+        return  s->slabs * (page_size << s->order);
+}
+
+
+void slabcache(struct slabinfo *s)
+{
+        char size_str[20];
+        char dist_str[40];
+        char flags[20];
+        char *p = flags;
+
+        if (skip_zero && !s->slabs)
+                return;
+
+        store_size(size_str, slab_size(s));
+        sprintf(dist_str,"%lu/%lu/%d", s->slabs, s->partial, s->cpu_slabs);
+
+        if (!line++)
+                first_line();
+
+        if (s->aliases)
+                *p++ = '*';
+        if (s->cache_dma)
+                *p++ = 'd';
+        if (s->hwcache_align)
+                *p++ = 'A';
+        if (s->poison)
+                *p++ = 'P';
+        if (s->reclaim_account)
+                *p++ = 'a';
+        if (s->red_zone)
+                *p++ = 'Z';
+        if (s->sanity_checks)
+                *p++ = 'F';
+        if (s->store_user)
+                *p++ = 'U';
+        if (s->trace)
+                *p++ = 'T';
+
+        *p = 0;
+        printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
+                s->name, s->objects, s->object_size, size_str, dist_str,
+                s->objs_per_slab, s->order,
+                s->slabs ? (s->partial * 100) / s->slabs : 100,
+                s->slabs ? (s->objects * s->object_size * 100) /
+                        (s->slabs * (page_size << s->order)) : 100,
+                flags);
+}
+
+void slab_numa(struct slabinfo *s)
+{
+        int node;
+
+        if (!highest_node)
+                fatal("No NUMA information available.\n");
+
+        if (skip_zero && !s->slabs)
+                return;
+
+        if (!line) {
+                printf("\nSlab             Node ");
+                for(node = 0; node <= highest_node; node++)
+                        printf(" %4d", node);
+                printf("\n----------------------");
+                for(node = 0; node <= highest_node; node++)
+                        printf("-----");
+                printf("\n");
+        }
+        printf("%-21s ", s->name);
+        for(node = 0; node <= highest_node; node++) {
+                char b[20];
+
+                store_size(b, s->numa[node]);
+                printf(" %4s", b);
+        }
+        printf("\n");
+        line++;
+}
+
+void show_tracking(struct slabinfo *s)
+{
+        printf("\n%s: Calls to allocate a slab object\n", s->name);
+        printf("---------------------------------------------------\n");
+        if (read_obj("alloc_calls"))
+                printf(buffer);
+
+        printf("%s: Calls to free a slab object\n", s->name);
+        printf("-----------------------------------------------\n");
+        if (read_obj("free_calls"))
+                printf(buffer);
+
+}
+
+void totals(void)
+{
+        struct slabinfo *s;
+
+        int used_slabs = 0;
+        char b1[20], b2[20], b3[20], b4[20];
+        unsigned long long max = 1ULL << 63;
+
+        /* Object size */
+        unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+        /* Number of partial slabs in a slabcache */
+        unsigned long long min_partial = max, max_partial = 0,
+                                avg_partial, total_partial = 0;
+
+        /* Number of slabs in a slab cache */
+        unsigned long long min_slabs = max, max_slabs = 0,
+                                avg_slabs, total_slabs = 0;
+
+        /* Size of the whole slab */
+        unsigned long long min_size = max, max_size = 0,
+                                avg_size, total_size = 0;
+
+        /* Bytes used for object storage in a slab */
+        unsigned long long min_used = max, max_used = 0,
+                                avg_used, total_used = 0;
+
+        /* Waste: Bytes used for alignment and padding */
+        unsigned long long min_waste = max, max_waste = 0,
+                                avg_waste, total_waste = 0;
+        /* Number of objects in a slab */
+        unsigned long long min_objects = max, max_objects = 0,
+                                avg_objects, total_objects = 0;
+        /* Waste per object */
+        unsigned long long min_objwaste = max,
+                                max_objwaste = 0, avg_objwaste,
+                                total_objwaste = 0;
+
+        /* Memory per object */
+        unsigned long long min_memobj = max,
+                                max_memobj = 0, avg_memobj,
+                                total_objsize = 0;
+
+        /* Percentage of partial slabs per slab */
+        unsigned long min_ppart = 100, max_ppart = 0,
+                                avg_ppart, total_ppart = 0;
+
+        /* Number of objects in partial slabs */
+        unsigned long min_partobj = max, max_partobj = 0,
+                                avg_partobj, total_partobj = 0;
+
+        /* Percentage of partial objects of all objects in a slab */
+        unsigned long min_ppartobj = 100, max_ppartobj = 0,
+                                avg_ppartobj, total_ppartobj = 0;
+
+
+        for (s = slabinfo; s < slabinfo + slabs; s++) {
+                unsigned long long size;
+                unsigned long used;
+                unsigned long long wasted;
+                unsigned long long objwaste;
+                long long objects_in_partial_slabs;
+                unsigned long percentage_partial_slabs;
+                unsigned long percentage_partial_objs;
+
+                if (!s->slabs || !s->objects)
+                        continue;
+
+                used_slabs++;
+
+                size = slab_size(s);
+                used = s->objects * s->object_size;
+                wasted = size - used;
+                objwaste = s->slab_size - s->object_size;
+
+                objects_in_partial_slabs = s->objects -
+                        (s->slabs - s->partial - s ->cpu_slabs) *
+                        s->objs_per_slab;
+
+                if (objects_in_partial_slabs < 0)
+                        objects_in_partial_slabs = 0;
+
+                percentage_partial_slabs = s->partial * 100 / s->slabs;
+                if (percentage_partial_slabs > 100)
+                        percentage_partial_slabs = 100;
+
+                percentage_partial_objs = objects_in_partial_slabs * 100
+                                                        / s->objects;
+
+                if (percentage_partial_objs > 100)
+                        percentage_partial_objs = 100;
+
+                if (s->object_size < min_objsize)
+                        min_objsize = s->object_size;
+                if (s->partial < min_partial)
+                        min_partial = s->partial;
+                if (s->slabs < min_slabs)
+                        min_slabs = s->slabs;
+                if (size < min_size)
+                        min_size = size;
+                if (wasted < min_waste)
+                        min_waste = wasted;
+                if (objwaste < min_objwaste)
+                        min_objwaste = objwaste;
+                if (s->objects < min_objects)
+                        min_objects = s->objects;
+                if (used < min_used)
+                        min_used = used;
+                if (objects_in_partial_slabs < min_partobj)
+                        min_partobj = objects_in_partial_slabs;
+                if (percentage_partial_slabs < min_ppart)
+                        min_ppart = percentage_partial_slabs;
+                if (percentage_partial_objs < min_ppartobj)
+                        min_ppartobj = percentage_partial_objs;
+                if (s->slab_size < min_memobj)
+                        min_memobj = s->slab_size;
+
+                if (s->object_size > max_objsize)
+                        max_objsize = s->object_size;
+                if (s->partial > max_partial)
+                        max_partial = s->partial;
+                if (s->slabs > max_slabs)
+                        max_slabs = s->slabs;
+                if (size > max_size)
+                        max_size = size;
+                if (wasted > max_waste)
+                        max_waste = wasted;
+                if (objwaste > max_objwaste)
+                        max_objwaste = objwaste;
+                if (s->objects > max_objects)
+                        max_objects = s->objects;
+                if (used > max_used)
+                        max_used = used;
+                if (objects_in_partial_slabs > max_partobj)
+                        max_partobj = objects_in_partial_slabs;
+                if (percentage_partial_slabs > max_ppart)
+                        max_ppart = percentage_partial_slabs;
+                if (percentage_partial_objs > max_ppartobj)
+                        max_ppartobj = percentage_partial_objs;
+                if (s->slab_size > max_memobj)
+                        max_memobj = s->slab_size;
+
+                total_partial += s->partial;
+                total_slabs += s->slabs;
+                total_size += size;
+                total_waste += wasted;
+
+                total_objects += s->objects;
+                total_used += used;
+                total_partobj += objects_in_partial_slabs;
+                total_ppart += percentage_partial_slabs;
+                total_ppartobj += percentage_partial_objs;
+
+                total_objwaste += s->objects * objwaste;
+                total_objsize += s->objects * s->slab_size;
+        }
+
+        if (!total_objects) {
+                printf("No objects\n");
+                return;
+        }
+        if (!used_slabs) {
+                printf("No slabs\n");
+                return;
+        }
+
+        /* Per slab averages */
+        avg_partial = total_partial / used_slabs;
+        avg_slabs = total_slabs / used_slabs;
+        avg_size = total_size / used_slabs;
+        avg_waste = total_waste / used_slabs;
+
+        avg_objects = total_objects / used_slabs;
+        avg_used = total_used / used_slabs;
+        avg_partobj = total_partobj / used_slabs;
+        avg_ppart = total_ppart / used_slabs;
+        avg_ppartobj = total_ppartobj / used_slabs;
+
+        /* Per object object sizes */
+        avg_objsize = total_used / total_objects;
+        avg_objwaste = total_objwaste / total_objects;
+        avg_partobj = total_partobj * 100 / total_objects;
+        avg_memobj = total_objsize / total_objects;
+
+        printf("Slabcache Totals\n");
+        printf("----------------\n");
+        printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
+                        slabs, aliases, alias_targets, used_slabs);
+
+        store_size(b1, total_size);store_size(b2, total_waste);
+        store_size(b3, total_waste * 100 / total_used);
+        printf("Memory used: %6s   # Loss   : %6s   MRatio: %6s%%\n", b1, b2, b3);
+
+        store_size(b1, total_objects);store_size(b2, total_partobj);
+        store_size(b3, total_partobj * 100 / total_objects);
+        printf("# Objects  : %6s   # PartObj: %6s   ORatio: %6s%%\n", b1, b2, b3);
+
+        printf("\n");
+        printf("Per Cache    Average         Min         Max       Total\n");
+        printf("---------------------------------------------------------\n");
+
+        store_size(b1, avg_objects);store_size(b2, min_objects);
+        store_size(b3, max_objects);store_size(b4, total_objects);
+        printf("#Objects  %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_slabs);store_size(b2, min_slabs);
+        store_size(b3, max_slabs);store_size(b4, total_slabs);
+        printf("#Slabs    %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_partial);store_size(b2, min_partial);
+        store_size(b3, max_partial);store_size(b4, total_partial);
+        printf("#PartSlab %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+        store_size(b1, avg_ppart);store_size(b2, min_ppart);
+        store_size(b3, max_ppart);
+        store_size(b4, total_partial * 100  / total_slabs);
+        printf("%%PartSlab %10s%% %10s%% %10s%% %10s%%\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_partobj);store_size(b2, min_partobj);
+        store_size(b3, max_partobj);
+        store_size(b4, total_partobj);
+        printf("PartObjs  %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
+        store_size(b3, max_ppartobj);
+        store_size(b4, total_partobj * 100 / total_objects);
+        printf("%% PartObj %10s%% %10s%% %10s%% %10s%%\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_size);store_size(b2, min_size);
+        store_size(b3, max_size);store_size(b4, total_size);
+        printf("Memory    %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_used);store_size(b2, min_used);
+        store_size(b3, max_used);store_size(b4, total_used);
+        printf("Used      %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+
+        store_size(b1, avg_waste);store_size(b2, min_waste);
+        store_size(b3, max_waste);store_size(b4, total_waste);
+        printf("Loss      %10s  %10s  %10s  %10s\n",
+                        b1,     b2,     b3,     b4);
+
+        printf("\n");
+        printf("Per Object   Average         Min         Max\n");
+        printf("---------------------------------------------\n");
+
+        store_size(b1, avg_memobj);store_size(b2, min_memobj);
+        store_size(b3, max_memobj);
+        printf("Memory    %10s  %10s  %10s\n",
+                        b1,     b2,     b3);
+        store_size(b1, avg_objsize);store_size(b2, min_objsize);
+        store_size(b3, max_objsize);
+        printf("User      %10s  %10s  %10s\n",
+                        b1,     b2,     b3);
+
+        store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+        store_size(b3, max_objwaste);
+        printf("Loss      %10s  %10s  %10s\n",
+                        b1,     b2,     b3);
+}
+
+void sort_slabs(void)
+{
+        struct slabinfo *s1,*s2;
+
+        for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+                for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+                        int result;
+
+                        if (sort_size)
+                                result = slab_size(s1) < slab_size(s2);
+                        else
+                                result = strcasecmp(s1->name, s2->name);
+
+                        if (show_inverted)
+                                result = -result;
+
+                        if (result > 0) {
+                                struct slabinfo t;
+
+                                memcpy(&t, s1, sizeof(struct slabinfo));
+                                memcpy(s1, s2, sizeof(struct slabinfo));
+                                memcpy(s2, &t, sizeof(struct slabinfo));
+                        }
+                }
+        }
+}
+
+void sort_aliases(void)
+{
+        struct aliasinfo *a1,*a2;
+
+        for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
+                for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
+                        char *n1, *n2;
+
+                        n1 = a1->name;
+                        n2 = a2->name;
+                        if (show_alias && !show_inverted) {
+                                n1 = a1->ref;
+                                n2 = a2->ref;
+                        }
+                        if (strcasecmp(n1, n2) > 0) {
+                                struct aliasinfo t;
+
+                                memcpy(&t, a1, sizeof(struct aliasinfo));
+                                memcpy(a1, a2, sizeof(struct aliasinfo));
+                                memcpy(a2, &t, sizeof(struct aliasinfo));
+                        }
+                }
+        }
+}
+
+void link_slabs(void)
+{
+        struct aliasinfo *a;
+        struct slabinfo *s;
+
+        for (a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+                for(s = slabinfo; s < slabinfo + slabs; s++)
+                        if (strcmp(a->ref, s->name) == 0) {
+                                a->slab = s;
+                                s->refs++;
+                                break;
+                        }
+                if (s == slabinfo + slabs)
+                        fatal("Unresolved alias %s\n", a->ref);
+        }
+}
+
+void alias(void)
+{
+        struct aliasinfo *a;
+        char *active = NULL;
+
+        sort_aliases();
+        link_slabs();
+
+        for(a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+                if (!show_single_ref && a->slab->refs == 1)
+                        continue;
+
+                if (!show_inverted) {
+                        if (active) {
+                                if (strcmp(a->slab->name, active) == 0) {
+                                        printf(" %s", a->name);
+                                        continue;
+                                }
+                        }
+                        printf("\n%-20s <- %s", a->slab->name, a->name);
+                        active = a->slab->name;
+                }
+                else
+                        printf("%-20s -> %s\n", a->name, a->slab->name);
+        }
+        if (active)
+                printf("\n");
+}
+
+
+void rename_slabs(void)
+{
+        struct slabinfo *s;
+        struct aliasinfo *a;
+
+        for (s = slabinfo; s < slabinfo + slabs; s++) {
+                if (*s->name != ':')
+                        continue;
+
+                if (s->refs > 1 && !show_first_alias)
+                        continue;
+
+                a = find_one_alias(s);
+
+                s->name = a->name;
+        }
+}
+
+int slab_mismatch(char *slab)
+{
+        return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+void read_slab_dir(void)
+{
+        DIR *dir;
+        struct dirent *de;
+        struct slabinfo *slab = slabinfo;
+        struct aliasinfo *alias = aliasinfo;
+        char *p;
+        char *t;
+        int count;
+
+        dir = opendir(".");
+        while ((de = readdir(dir))) {
+                if (de->d_name[0] == '.' ||
+                                slab_mismatch(de->d_name))
+                        continue;
+                switch (de->d_type) {
+                   case DT_LNK:
+                        alias->name = strdup(de->d_name);
+                        count = readlink(de->d_name, buffer, sizeof(buffer));
+
+                        if (count < 0)
+                                fatal("Cannot read symlink %s\n", de->d_name);
+
+                        buffer[count] = 0;
+                        p = buffer + count;
+                        while (p > buffer && p[-1] != '/')
+                                p--;
+                        alias->ref = strdup(p);
+                        alias++;
+                        break;
+                   case DT_DIR:
+                        if (chdir(de->d_name))
+                                fatal("Unable to access slab %s\n", slab->name);
+                        slab->name = strdup(de->d_name);
+                        slab->alias = 0;
+                        slab->refs = 0;
+                        slab->aliases = get_obj("aliases");
+                        slab->align = get_obj("align");
+                        slab->cache_dma = get_obj("cache_dma");
+                        slab->cpu_slabs = get_obj("cpu_slabs");
+                        slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+                        slab->hwcache_align = get_obj("hwcache_align");
+                        slab->object_size = get_obj("object_size");
+                        slab->objects = get_obj("objects");
+                        slab->objs_per_slab = get_obj("objs_per_slab");
+                        slab->order = get_obj("order");
+                        slab->partial = get_obj("partial");
+                        slab->partial = get_obj_and_str("partial", &t);
+                        decode_numa_list(slab->numa_partial, t);
+                        slab->poison = get_obj("poison");
+                        slab->reclaim_account = get_obj("reclaim_account");
+                        slab->red_zone = get_obj("red_zone");
+                        slab->sanity_checks = get_obj("sanity_checks");
+                        slab->slab_size = get_obj("slab_size");
+                        slab->slabs = get_obj_and_str("slabs", &t);
+                        decode_numa_list(slab->numa, t);
+                        slab->store_user = get_obj("store_user");
+                        slab->trace = get_obj("trace");
+                        chdir("..");
+                        if (slab->name[0] == ':')
+                                alias_targets++;
+                        slab++;
+                        break;
+                   default :
+                        fatal("Unknown file type %lx\n", de->d_type);
+                }
+        }
+        closedir(dir);
+        slabs = slab - slabinfo;
+        aliases = alias - aliasinfo;
+        if (slabs > MAX_SLABS)
+                fatal("Too many slabs\n");
+        if (aliases > MAX_ALIASES)
+                fatal("Too many aliases\n");
+}
+
+void output_slabs(void)
+{
+        struct slabinfo *slab;
+
+        for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+                if (slab->alias)
+                        continue;
+
+
+                if (show_numa)
+                        slab_numa(slab);
+                else
+                if (show_track)
+                        show_tracking(slab);
+                else
+                if (validate)
+                        slab_validate(slab);
+                else
+                if (shrink)
+                        slab_shrink(slab);
+                else {
+                        if (show_slab)
+                                slabcache(slab);
+                }
+        }
+}
+
+struct option opts[] = {
+        { "aliases", 0, NULL, 'a' },
+        { "slabs", 0, NULL, 'l' },
+        { "numa", 0, NULL, 'n' },
+        { "zero", 0, NULL, 'z' },
+        { "help", 0, NULL, 'h' },
+        { "validate", 0, NULL, 'v' },
+        { "first-alias", 0, NULL, 'f' },
+        { "shrink", 0, NULL, 's' },
+        { "track", 0, NULL, 't'},
+        { "inverted", 0, NULL, 'i'},
+        { "1ref", 0, NULL, '1'},
+        { NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+        int c;
+        int err;
+        char *pattern_source;
+
+        page_size = getpagesize();
+        if (chdir("/sys/slab"))
+                fatal("This kernel does not have SLUB support.\n");
+
+        while ((c = getopt_long(argc, argv, "afhil1npstvzTS", opts, NULL)) != -1)
+        switch(c) {
+                case '1':
+                        show_single_ref = 1;
+                        break;
+                case 'a':
+                        show_alias = 1;
+                        break;
+                case 'f':
+                        show_first_alias = 1;
+                        break;
+                case 'h':
+                        usage();
+                        return 0;
+                case 'i':
+                        show_inverted = 1;
+                        break;
+                case 'n':
+                        show_numa = 1;
+                        break;
+                case 's':
+                        shrink = 1;
+                        break;
+                case 'l':
+                        show_slab = 1;
+                        break;
+                case 't':
+                        show_track = 1;
+                        break;
+                case 'v':
+                        validate = 1;
+                        break;
+                case 'z':
+                        skip_zero = 0;
+                        break;
+                case 'T':
+                        show_totals = 1;
+                        break;
+                case 'S':
+                        sort_size = 1;
+                        break;
+
+                default:
+                        fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+        }
+
+        if (!show_slab && !show_alias && !show_track
+                && !validate && !shrink)
+                        show_slab = 1;
+
+        if (argc > optind)
+                pattern_source = argv[optind];
+        else
+                pattern_source = ".*";
+
+        err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+        if (err)
+                fatal("%s: Invalid pattern '%s' code %d\n",
+                        argv[0], pattern_source, err);
+        read_slab_dir();
+        if (show_alias)
+                alias();
+        else
+        if (show_totals)
+                totals();
+        else {
+                link_slabs();
+                rename_slabs();
+                sort_slabs();
+                output_slabs();
+        }
+        return 0;
+}