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authorVladimir Davydov <vdavydov@parallels.com>2014-12-11 02:42:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-11 04:41:04 +0300
commit1df3b26f201f7f08852c14596bc3ee6ba1826f11 (patch)
tree8eaf11024072d71c3701bc5d25e5d27f446f2ae1 /mm/slab_common.c
parentb455def28d8a22aee4a13d065b3fd1d296833606 (diff)
downloadlinux-1df3b26f201f7f08852c14596bc3ee6ba1826f11.tar.xz
slab: print slabinfo header in seq show
Currently we print the slabinfo header in the seq start method, which makes it unusable for showing leaks, so we have leaks_show, which does practically the same as s_show except it doesn't show the header. However, we can print the header in the seq show method - we only need to check if the current element is the first on the list. This will allow us to use the same set of seq iterators for both leaks and slabinfo reporting, which is nice. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab_common.c')
-rw-r--r--mm/slab_common.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index dcdab81bd240..06aeaf091f21 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -834,14 +834,9 @@ void print_slabinfo_header(struct seq_file *m)
seq_putc(m, '\n');
}
-static void *s_start(struct seq_file *m, loff_t *pos)
+void *slab_start(struct seq_file *m, loff_t *pos)
{
- loff_t n = *pos;
-
mutex_lock(&slab_mutex);
- if (!n)
- print_slabinfo_header(m);
-
return seq_list_start(&slab_caches, *pos);
}
@@ -903,10 +898,12 @@ int cache_show(struct kmem_cache *s, struct seq_file *m)
return 0;
}
-static int s_show(struct seq_file *m, void *p)
+static int slab_show(struct seq_file *m, void *p)
{
struct kmem_cache *s = list_entry(p, struct kmem_cache, list);
+ if (p == slab_caches.next)
+ print_slabinfo_header(m);
if (!is_root_cache(s))
return 0;
return cache_show(s, m);
@@ -926,10 +923,10 @@ static int s_show(struct seq_file *m, void *p)
* + further values on SMP and with statistics enabled
*/
static const struct seq_operations slabinfo_op = {
- .start = s_start,
+ .start = slab_start,
.next = slab_next,
.stop = slab_stop,
- .show = s_show,
+ .show = slab_show,
};
static int slabinfo_open(struct inode *inode, struct file *file)