The patch titled
slub: add slabinfo tool
has been added to the -mm tree. Its filename is
slub-add-slabinfo-tool.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: slub: add slabinfo tool
From: Christoph Lameter <clameter@xxxxxxx>
Add the tool which gets reports about slabs to the VM documentation directory.
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/slabinfo.c | 220 ++++++++++++++++++++++++++++++++++
1 file changed, 220 insertions(+)
diff -puN /dev/null Documentation/vm/slabinfo.c
--- /dev/null
+++ a/Documentation/vm/slabinfo.c
@@ -0,0 +1,220 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter <clameter@xxxxxxx>
+ *
+ * Compile by doing:
+ *
+ * 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>
+
+char buffer[200];
+
+int show_alias = 0;
+int show_slab = 1;
+int show_parameter = 0;
+int skip_zero = 1;
+
+int page_size;
+
+void fatal(const char *x, ...)
+{
+ va_list ap;
+
+ va_start(ap, x);
+ vfprintf(stderr, x, ap);
+ va_end(ap);
+ exit(1);
+}
+
+/*
+ * Get the contents of an attribute
+ */
+unsigned long get_obj(char *name)
+{
+ FILE *f = fopen(name, "r");
+ unsigned long result = 0;
+
+ if (!f) {
+ getcwd(buffer, sizeof(buffer));
+ fatal("Cannot open file '%s/%s'\n", buffer, name);
+ }
+
+ if (fgets(buffer,sizeof(buffer), f))
+ result = atol(buffer);
+ fclose(f);
+ return result;
+}
+
+/*
+ * 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 alias(const char *name)
+{
+ char *target;
+
+ if (!show_alias)
+ return;
+ /* Read link target */
+ printf("%20s -> %s", name, target);
+}
+
+int line = 0;
+
+void first_line(void)
+{
+ printf("Name Objects Objsize Space "
+ "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
+}
+
+void slab(const char *name)
+{
+ unsigned long aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
+ unsigned long hwcache_align, object_size, objects, objs_per_slab;
+ unsigned long order, partial, poison, reclaim_account, red_zone;
+ unsigned long sanity_checks, slab_size, slabs, store_user, trace;
+ char size_str[20];
+ char dist_str[40];
+ char flags[20];
+ char *p = flags;
+
+ if (!show_slab)
+ return;
+
+ if (chdir(name))
+ fatal("Unable to access slab %s\n", name);
+
+ aliases = get_obj("aliases");
+ align = get_obj("align");
+ cache_dma = get_obj("cache_dma");
+ cpu_slabs = get_obj("cpu_slabs");
+ destroy_by_rcu = get_obj("destroy_by_rcu");
+ hwcache_align = get_obj("hwcache_align");
+ object_size = get_obj("object_size");
+ objects = get_obj("objects");
+ objs_per_slab = get_obj("objs_per_slab");
+ order = get_obj("order");
+ partial = get_obj("partial");
+ poison = get_obj("poison");
+ reclaim_account = get_obj("reclaim_account");
+ red_zone = get_obj("red_zone");
+ sanity_checks = get_obj("sanity_checks");
+ slab_size = get_obj("slab_size");
+ slabs = get_obj("slabs");
+ store_user = get_obj("store_user");
+ trace = get_obj("trace");
+
+ if (skip_zero && !slabs)
+ goto out;
+
+ store_size(size_str, slabs * page_size);
+ sprintf(dist_str,"%lu/%lu/%lu", slabs, partial, cpu_slabs);
+
+ if (!line++)
+ first_line();
+
+ if (aliases)
+ *p++ = '*';
+ if (cache_dma)
+ *p++ = 'd';
+ if (hwcache_align)
+ *p++ = 'A';
+ if (poison)
+ *p++ = 'P';
+ if (reclaim_account)
+ *p++ = 'a';
+ if (red_zone)
+ *p++ = 'Z';
+ if (sanity_checks)
+ *p++ = 'F';
+ if (store_user)
+ *p++ = 'U';
+ if (trace)
+ *p++ = 'T';
+
+ *p = 0;
+ printf("%-20s %8ld %7d %8s %14s %3ld %1ld %3d %3d %s\n",
+ name, objects, object_size, size_str, dist_str,
+ objs_per_slab, order,
+ slabs ? (partial * 100) / slabs : 100,
+ slabs ? (objects * object_size * 100) / (slabs * (page_size << order)) : 100,
+ flags);
+out:
+ chdir("..");
+}
+
+void parameter(const char *name)
+{
+ if (!show_parameter)
+ return;
+}
+
+int main(int argc, char *argv[])
+{
+ DIR *dir;
+ struct dirent *de;
+
+ page_size = getpagesize();
+ if (chdir("/sys/slab"))
+ fatal("This kernel does not have SLUB support.\n");
+
+ dir = opendir(".");
+ while ((de = readdir(dir))) {
+ if (de->d_name[0] == '.')
+ continue;
+ switch (de->d_type) {
+ case DT_LNK:
+ alias(de->d_name);
+ break;
+ case DT_DIR:
+ slab(de->d_name);
+ break;
+ case DT_REG:
+ parameter(de->d_name);
+ break;
+ default :
+ fatal("Unknown file type %lx\n", de->d_type);
+ }
+ }
+ closedir(dir);
+ return 0;
+}
_
Patches currently in -mm which might be from clameter@xxxxxxx are
slab-introduce-krealloc.patch
slab-introduce-krealloc-fix.patch
safer-nr_node_ids-and-nr_node_ids-determination-and-initial.patch
use-zvc-counters-to-establish-exact-size-of-dirtyable-pages.patch
slab-ensure-cache_alloc_refill-terminates.patch
smaps-extract-pmd-walker-from-smaps-code.patch
smaps-add-pages-referenced-count-to-smaps.patch
smaps-add-clear_refs-file-to-clear-reference.patch
smaps-add-clear_refs-file-to-clear-reference-fix.patch
smaps-add-clear_refs-file-to-clear-reference-fix-fix.patch
slab-use-num_possible_cpus-in-enable_cpucache.patch
slub-core.patch
extend-print_symbol-capability-fix.patch
slab-shutdown-cache_reaper-when-cpu-goes-down.patch
mm-implement-swap-prefetching.patch
readahead-state-based-method-aging-accounting.patch
slub-add-slabinfo-tool.patch
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