From: "tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org" <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: shyju pv <shyju.pv-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Cc: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Sanil kumar <sanil.kumar-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Masanari Iida
<standby24x7-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Subject: Re: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup]
Date: Wed, 27 Jun 2012 16:02:30 -0700 [thread overview]
Message-ID: <20120627230230.GT15811@google.com> (raw)
In-Reply-To: <20120627182903.GP15811-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Hello,
Does the following patch make the problem go away?
Thank you.
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 2097684..f9556cf 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3644,6 +3644,7 @@ static void cgroup_event_remove(struct work_struct *work)
eventfd_ctx_put(event->eventfd);
kfree(event);
dput(cgrp->dentry);
+ deactivate_super(cgrp->root->sb);
}
/*
@@ -3770,6 +3771,7 @@ static int cgroup_write_event_control(struct cgroup *cgrp, struct cftype *cft,
* destroying subsystem state objects. Let's take reference to cgroup
* directory dentry to do that.
*/
+ atomic_inc(&cgrp->root->sb->s_active);
dget(cgrp->dentry);
spin_lock(&cgrp->event_list_lock);
WARNING: multiple messages have this Message-ID (diff)
From: "tj@kernel.org" <tj@kernel.org>
To: shyju pv <shyju.pv@huawei.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
Sanil kumar <sanil.kumar@huawei.com>,
Masanari Iida <standby24x7@gmail.com>,
Li Zefan <lizefan@huawei.com>
Subject: Re: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup]
Date: Wed, 27 Jun 2012 16:02:30 -0700 [thread overview]
Message-ID: <20120627230230.GT15811@google.com> (raw)
In-Reply-To: <20120627182903.GP15811@google.com>
Hello,
Does the following patch make the problem go away?
Thank you.
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 2097684..f9556cf 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3644,6 +3644,7 @@ static void cgroup_event_remove(struct work_struct *work)
eventfd_ctx_put(event->eventfd);
kfree(event);
dput(cgrp->dentry);
+ deactivate_super(cgrp->root->sb);
}
/*
@@ -3770,6 +3771,7 @@ static int cgroup_write_event_control(struct cgroup *cgrp, struct cftype *cft,
* destroying subsystem state objects. Let's take reference to cgroup
* directory dentry to do that.
*/
+ atomic_inc(&cgrp->root->sb->s_active);
dget(cgrp->dentry);
spin_lock(&cgrp->event_list_lock);
next prev parent reply other threads:[~2012-06-27 23:02 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-24 19:08 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup] shyju pv
2012-06-24 19:08 ` shyju pv
[not found] ` <E061084CB90FCE4F89232A6CF839683B32B52291-SY/3K1LPFSqBBfbIEMVH7QK1hpo4iccwjNknBlVQO8k@public.gmane.org>
2012-06-26 23:00 ` Masanari Iida
2012-06-26 23:00 ` Masanari Iida
2012-06-27 18:29 ` tj-DgEjT+Ai2ygdnm+yROfE0A
2012-06-27 18:29 ` tj
[not found] ` <20120627182903.GP15811-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-06-27 23:02 ` tj-DgEjT+Ai2ygdnm+yROfE0A [this message]
2012-06-27 23:02 ` tj
[not found] ` <20120627230230.GT15811-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-06-28 14:09 ` Masanari Iida
2012-06-28 14:09 ` Masanari Iida
2012-06-28 6:07 ` Li Zefan
2012-06-28 6:07 ` Li Zefan
[not found] ` <4FEBF4B7.2070105-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2012-06-28 18:07 ` tj-DgEjT+Ai2ygdnm+yROfE0A
2012-06-28 18:07 ` tj
[not found] ` <20120628180712.GC22641-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-06-29 2:20 ` Li Zefan
2012-06-29 2:20 ` Li Zefan
[not found] ` <4FED10DB.7040500-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2012-06-29 16:58 ` tj-DgEjT+Ai2ygdnm+yROfE0A
2012-06-29 16:58 ` tj
2012-06-29 18:07 ` Masanari Iida
[not found] ` <20120629165809.GB21048-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-06-30 6:13 ` Li Zefan
2012-06-30 6:13 ` Li Zefan
[not found] ` <4FEE98EE.1050409-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2012-06-30 6:47 ` Al Viro
2012-06-30 6:47 ` Al Viro
[not found] ` <20120630064724.GC14083-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2012-06-30 7:04 ` Tejun Heo
2012-06-30 7:04 ` Tejun Heo
[not found] ` <CAOS58YNnU3J+c2ZQcRCesSoxn0dSJjDLBsZ2qzZ09X6N-ky0fQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-06-30 8:34 ` Al Viro
2012-06-30 8:34 ` Al Viro
[not found] ` <20120630083421.GD14083-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2012-07-03 17:10 ` Tejun Heo
2012-07-03 17:10 ` Tejun Heo
[not found] ` <20120703171033.GC555-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-07-03 17:38 ` [PATCH] cgroup: cgroup_rm_files() was calling simple_unlink() with the wrong inode Tejun Heo
2012-07-03 17:38 ` Tejun Heo
[not found] ` <20120703173806.GD555-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-07-04 5:40 ` Li Zefan
2012-07-04 5:40 ` Li Zefan
[not found] ` <4FF3D757.9060905-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2012-07-09 17:11 ` Tejun Heo
2012-07-09 17:11 ` Tejun Heo
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