Merge branch 'slub-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm

* 'slub-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm:
  SLUB: fix checkpatch warnings
  Use non atomic unlock
  SLUB: Support for performance statistics
  SLUB: Alternate fast paths using cmpxchg_local
  SLUB: Use unique end pointer for each slab page.
  SLUB: Deal with annoying gcc warning on kfree()

1 files changed, 138 insertions, 11 deletions

diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
index 488c1f31b992..7123fee708ca 100644
--- a/Documentation/vm/slabinfo.c
+++ b/Documentation/vm/slabinfo.c
@@ -32,6 +32,13 @@ struct slabinfo {
         int sanity_checks, slab_size, store_user, trace;
         int order, poison, reclaim_account, red_zone;
         unsigned long partial, objects, slabs;
+        unsigned long alloc_fastpath, alloc_slowpath;
+        unsigned long free_fastpath, free_slowpath;
+        unsigned long free_frozen, free_add_partial, free_remove_partial;
+        unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
+        unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+        unsigned long deactivate_to_head, deactivate_to_tail;
+        unsigned long deactivate_remote_frees;
         int numa[MAX_NODES];
         int numa_partial[MAX_NODES];
 } slabinfo[MAX_SLABS];
@@ -64,8 +71,10 @@ int show_inverted = 0;
 int show_single_ref = 0;
 int show_totals = 0;
 int sort_size = 0;
+int sort_active = 0;
 int set_debug = 0;
 int show_ops = 0;
+int show_activity = 0;
 
 /* Debug options */
 int sanity = 0;
@@ -93,8 +102,10 @@ void usage(void)
         printf("slabinfo 5/7/2007. (c) 2007 sgi. clameter@sgi.com\n\n"
                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
                 "-a|--aliases           Show aliases\n"
+                "-A|--activity          Most active slabs first\n"
                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
-                "-e|--empty             Show empty slabs\n"
+                "-D|--display-active    Switch line format to activity\n"
+                "-e|--empty             Show empty slabs\n"
                 "-f|--first-alias       Show first alias\n"
                 "-h|--help              Show usage information\n"
                 "-i|--inverted          Inverted list\n"
@@ -281,8 +292,11 @@ int line = 0;
 
 void first_line(void)
 {
-        printf("Name                   Objects Objsize    Space "
-                "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
+        if (show_activity)
+                printf("Name                   Objects    Alloc     Free   %%Fast\n");
+        else
+                printf("Name                   Objects Objsize    Space "
+                        "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
 }
 
 /*
@@ -309,6 +323,12 @@ unsigned long slab_size(struct slabinfo *s)
         return  s->slabs * (page_size << s->order);
 }
 
+unsigned long slab_activity(struct slabinfo *s)
+{
+        return  s->alloc_fastpath + s->free_fastpath +
+                s->alloc_slowpath + s->free_slowpath;
+}
+
 void slab_numa(struct slabinfo *s, int mode)
 {
         int node;
@@ -392,6 +412,71 @@ const char *onoff(int x)
         return "Off";
 }
 
+void slab_stats(struct slabinfo *s)
+{
+        unsigned long total_alloc;
+        unsigned long total_free;
+        unsigned long total;
+
+        if (!s->alloc_slab)
+                return;
+
+        total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+        total_free = s->free_fastpath + s->free_slowpath;
+
+        if (!total_alloc)
+                return;
+
+        printf("\n");
+        printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
+        printf("--------------------------------------------------\n");
+        printf("Fastpath             %8lu %8lu %3lu %3lu\n",
+                s->alloc_fastpath, s->free_fastpath,
+                s->alloc_fastpath * 100 / total_alloc,
+                s->free_fastpath * 100 / total_free);
+        printf("Slowpath             %8lu %8lu %3lu %3lu\n",
+                total_alloc - s->alloc_fastpath, s->free_slowpath,
+                (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
+                s->free_slowpath * 100 / total_free);
+        printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
+                s->alloc_slab, s->free_slab,
+                s->alloc_slab * 100 / total_alloc,
+                s->free_slab * 100 / total_free);
+        printf("Add partial          %8lu %8lu %3lu %3lu\n",
+                s->deactivate_to_head + s->deactivate_to_tail,
+                s->free_add_partial,
+                (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
+                s->free_add_partial * 100 / total_free);
+        printf("Remove partial       %8lu %8lu %3lu %3lu\n",
+                s->alloc_from_partial, s->free_remove_partial,
+                s->alloc_from_partial * 100 / total_alloc,
+                s->free_remove_partial * 100 / total_free);
+
+        printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
+                s->deactivate_remote_frees, s->free_frozen,
+                s->deactivate_remote_frees * 100 / total_alloc,
+                s->free_frozen * 100 / total_free);
+
+        printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
+
+        if (s->cpuslab_flush)
+                printf("Flushes %8lu\n", s->cpuslab_flush);
+
+        if (s->alloc_refill)
+                printf("Refill %8lu\n", s->alloc_refill);
+
+        total = s->deactivate_full + s->deactivate_empty +
+                        s->deactivate_to_head + s->deactivate_to_tail;
+
+        if (total)
+                printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
+                        "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
+                        s->deactivate_full, (s->deactivate_full * 100) / total,
+                        s->deactivate_empty, (s->deactivate_empty * 100) / total,
+                        s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
+                        s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
+}
+
 void report(struct slabinfo *s)
 {
         if (strcmp(s->name, "*") == 0)
@@ -430,6 +515,7 @@ void report(struct slabinfo *s)
         ops(s);
         show_tracking(s);
         slab_numa(s, 1);
+        slab_stats(s);
 }
 
 void slabcache(struct slabinfo *s)
@@ -479,13 +565,27 @@ void slabcache(struct slabinfo *s)
                 *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);
+        if (show_activity) {
+                unsigned long total_alloc;
+                unsigned long total_free;
+
+                total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+                total_free = s->free_fastpath + s->free_slowpath;
+
+                printf("%-21s %8ld %8ld %8ld %3ld %3ld \n",
+                        s->name, s->objects,
+                        total_alloc, total_free,
+                        total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
+                        total_free ? (s->free_fastpath * 100 / total_free) : 0);
+        }
+        else
+                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);
 }
 
 /*
@@ -892,6 +992,8 @@ void sort_slabs(void)
 
                         if (sort_size)
                                 result = slab_size(s1) < slab_size(s2);
+                        else if (sort_active)
+                                result = slab_activity(s1) < slab_activity(s2);
                         else
                                 result = strcasecmp(s1->name, s2->name);
 
@@ -1074,6 +1176,23 @@ void read_slab_dir(void)
                         free(t);
                         slab->store_user = get_obj("store_user");
                         slab->trace = get_obj("trace");
+                        slab->alloc_fastpath = get_obj("alloc_fastpath");
+                        slab->alloc_slowpath = get_obj("alloc_slowpath");
+                        slab->free_fastpath = get_obj("free_fastpath");
+                        slab->free_slowpath = get_obj("free_slowpath");
+                        slab->free_frozen= get_obj("free_frozen");
+                        slab->free_add_partial = get_obj("free_add_partial");
+                        slab->free_remove_partial = get_obj("free_remove_partial");
+                        slab->alloc_from_partial = get_obj("alloc_from_partial");
+                        slab->alloc_slab = get_obj("alloc_slab");
+                        slab->alloc_refill = get_obj("alloc_refill");
+                        slab->free_slab = get_obj("free_slab");
+                        slab->cpuslab_flush = get_obj("cpuslab_flush");
+                        slab->deactivate_full = get_obj("deactivate_full");
+                        slab->deactivate_empty = get_obj("deactivate_empty");
+                        slab->deactivate_to_head = get_obj("deactivate_to_head");
+                        slab->deactivate_to_tail = get_obj("deactivate_to_tail");
+                        slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
                         chdir("..");
                         if (slab->name[0] == ':')
                                 alias_targets++;
@@ -1124,7 +1243,9 @@ void output_slabs(void)
 
 struct option opts[] = {
         { "aliases", 0, NULL, 'a' },
+        { "activity", 0, NULL, 'A' },
         { "debug", 2, NULL, 'd' },
+        { "display-activity", 0, NULL, 'D' },
         { "empty", 0, NULL, 'e' },
         { "first-alias", 0, NULL, 'f' },
         { "help", 0, NULL, 'h' },
@@ -1149,7 +1270,7 @@ int main(int argc, char *argv[])
 
         page_size = getpagesize();
 
-        while ((c = getopt_long(argc, argv, "ad::efhil1noprstvzTS",
+        while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
                                                 opts, NULL)) != -1)
                 switch (c) {
                 case '1':
@@ -1158,11 +1279,17 @@ int main(int argc, char *argv[])
                 case 'a':
                         show_alias = 1;
                         break;
+                case 'A':
+                        sort_active = 1;
+                        break;
                 case 'd':
                         set_debug = 1;
                         if (!debug_opt_scan(optarg))
                                 fatal("Invalid debug option '%s'\n", optarg);
                         break;
+                case 'D':
+                        show_activity = 1;
+                        break;
                 case 'e':
                         show_empty = 1;
                         break;