Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
slub: provide /proc/slabinfo
This adds a read-only /proc/slabinfo file on SLUB, that makes slabtop work.
[ mingo@elte.hu: build fix. ]
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
Pekka J Enberg
and committed by
Linus Torvalds
57ed3eda
476c6c11
+94
-13
+2
include/linux/slub_def.h
+2
include/linux/slub_def.h
+92
-13
mm/slub.c
+92
-13
mm/slub.c
···
3076
3076
return slab_alloc(s, gfpflags, node, caller);
3077
3077
}
3078
3078
3079
+
static unsigned long count_partial(struct kmem_cache_node *n)
3080
+
{
3081
+
unsigned long flags;
3082
+
unsigned long x = 0;
3083
+
struct page *page;
3084
+
3085
+
spin_lock_irqsave(&n->list_lock, flags);
3086
+
list_for_each_entry(page, &n->partial, lru)
3087
+
x += page->inuse;
3088
+
spin_unlock_irqrestore(&n->list_lock, flags);
3089
+
return x;
3090
+
}
3091
+
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#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
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static int validate_slab(struct kmem_cache *s, struct page *page,
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unsigned long *map)
···
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if (!t.count)
3470
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n += sprintf(buf, "No data\n");
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return n;
3472
-
}
3473
-
3474
-
static unsigned long count_partial(struct kmem_cache_node *n)
3475
-
{
3476
-
unsigned long flags;
3477
-
unsigned long x = 0;
3478
-
struct page *page;
3479
-
3480
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spin_lock_irqsave(&n->list_lock, flags);
3481
-
list_for_each_entry(page, &n->partial, lru)
3482
-
x += page->inuse;
3483
-
spin_unlock_irqrestore(&n->list_lock, flags);
3484
-
return x;
3485
3459
}
3486
3460
3487
3461
enum slab_stat_type {
···
4123
4123
4124
4124
__initcall(slab_sysfs_init);
4125
4125
#endif
4126
+
4127
+
/*
4128
+
* The /proc/slabinfo ABI
4129
+
*/
4130
+
#ifdef CONFIG_PROC_FS
4131
+
4132
+
static void print_slabinfo_header(struct seq_file *m)
4133
+
{
4134
+
seq_puts(m, "slabinfo - version: 2.1\n");
4135
+
seq_puts(m, "# name <active_objs> <num_objs> <objsize> "
4136
+
"<objperslab> <pagesperslab>");
4137
+
seq_puts(m, " : tunables <limit> <batchcount> <sharedfactor>");
4138
+
seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail>");
4139
+
seq_putc(m, '\n');
4140
+
}
4141
+
4142
+
static void *s_start(struct seq_file *m, loff_t *pos)
4143
+
{
4144
+
loff_t n = *pos;
4145
+
4146
+
down_read(&slub_lock);
4147
+
if (!n)
4148
+
print_slabinfo_header(m);
4149
+
4150
+
return seq_list_start(&slab_caches, *pos);
4151
+
}
4152
+
4153
+
static void *s_next(struct seq_file *m, void *p, loff_t *pos)
4154
+
{
4155
+
return seq_list_next(p, &slab_caches, pos);
4156
+
}
4157
+
4158
+
static void s_stop(struct seq_file *m, void *p)
4159
+
{
4160
+
up_read(&slub_lock);
4161
+
}
4162
+
4163
+
static int s_show(struct seq_file *m, void *p)
4164
+
{
4165
+
unsigned long nr_partials = 0;
4166
+
unsigned long nr_slabs = 0;
4167
+
unsigned long nr_inuse = 0;
4168
+
unsigned long nr_objs;
4169
+
struct kmem_cache *s;
4170
+
int node;
4171
+
4172
+
s = list_entry(p, struct kmem_cache, list);
4173
+
4174
+
for_each_online_node(node) {
4175
+
struct kmem_cache_node *n = get_node(s, node);
4176
+
4177
+
if (!n)
4178
+
continue;
4179
+
4180
+
nr_partials += n->nr_partial;
4181
+
nr_slabs += atomic_long_read(&n->nr_slabs);
4182
+
nr_inuse += count_partial(n);
4183
+
}
4184
+
4185
+
nr_objs = nr_slabs * s->objects;
4186
+
nr_inuse += (nr_slabs - nr_partials) * s->objects;
4187
+
4188
+
seq_printf(m, "%-17s %6lu %6lu %6u %4u %4d", s->name, nr_inuse,
4189
+
nr_objs, s->size, s->objects, (1 << s->order));
4190
+
seq_printf(m, " : tunables %4u %4u %4u", 0, 0, 0);
4191
+
seq_printf(m, " : slabdata %6lu %6lu %6lu", nr_slabs, nr_slabs,
4192
+
0UL);
4193
+
seq_putc(m, '\n');
4194
+
return 0;
4195
+
}
4196
+
4197
+
const struct seq_operations slabinfo_op = {
4198
+
.start = s_start,
4199
+
.next = s_next,
4200
+
.stop = s_stop,
4201
+
.show = s_show,
4202
+
};
4203
+
4204
+
#endif /* CONFIG_PROC_FS */