From: "Michal Koutný" <mkoutny@suse.com>
To: akpm@linux-foundation.org, Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
mhocko@kernel.org, vbabka@suse.cz, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH RESEND] slub: Remove userspace notifier for cache add/remove
Date: Thu, 23 Apr 2020 13:57:21 +0200 [thread overview]
Message-ID: <20200423115721.19821-1-mkoutny@suse.com> (raw)
From: Christoph Lameter <cl@linux.com>
I came across some unnecessary uevents once again which reminded me
this. The patch seems to be lost in the leaves of the original
discussion [1], so resending.
[1] https://lore.kernel.org/r/alpine.DEB.2.21.2001281813130.745@www.lameter.com
8<---
Kmem caches are internal kernel structures so it is strange that
userspace notifiers would be needed. And I am not aware of any use
of these notifiers. These notifiers may just exist because in the
initial slub release the sysfs code was copied from another
subsystem.
Signed-off-by: Christoph Lameter <cl@linux.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Koutný <mkoutny@suse.com>
---
mm/slub.c | 17 +----------------
1 file changed, 1 insertion(+), 16 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 332d4b459a90..ae6116adf875 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5665,19 +5665,6 @@ static struct kobj_type slab_ktype = {
.release = kmem_cache_release,
};
-static int uevent_filter(struct kset *kset, struct kobject *kobj)
-{
- struct kobj_type *ktype = get_ktype(kobj);
-
- if (ktype == &slab_ktype)
- return 1;
- return 0;
-}
-
-static const struct kset_uevent_ops slab_uevent_ops = {
- .filter = uevent_filter,
-};
-
static struct kset *slab_kset;
static inline struct kset *cache_kset(struct kmem_cache *s)
@@ -5745,7 +5732,6 @@ static void sysfs_slab_remove_workfn(struct work_struct *work)
#ifdef CONFIG_MEMCG
kset_unregister(s->memcg_kset);
#endif
- kobject_uevent(&s->kobj, KOBJ_REMOVE);
out:
kobject_put(&s->kobj);
}
@@ -5803,7 +5789,6 @@ static int sysfs_slab_add(struct kmem_cache *s)
}
#endif
- kobject_uevent(&s->kobj, KOBJ_ADD);
if (!unmergeable) {
/* Setup first alias */
sysfs_slab_alias(s, s->name);
@@ -5884,7 +5869,7 @@ static int __init slab_sysfs_init(void)
mutex_lock(&slab_mutex);
- slab_kset = kset_create_and_add("slab", &slab_uevent_ops, kernel_kobj);
+ slab_kset = kset_create_and_add("slab", NULL, kernel_kobj);
if (!slab_kset) {
mutex_unlock(&slab_mutex);
pr_err("Cannot register slab subsystem.\n");
--
2.26.0
next reply other threads:[~2020-04-23 11:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-23 11:57 Michal Koutný [this message]
2020-04-23 19:51 ` [PATCH RESEND] slub: Remove userspace notifier for cache add/remove David Rientjes
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