linux-kernel - Re: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup cgroup]

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Message-ID: <20120627182903.GP15811@google.com>
Date:	Wed, 27 Jun 2012 11:29:03 -0700
From:	"tj@...nel.org" <tj@...nel.org>
To:	shyju pv <shyju.pv@...wei.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
	Sanil kumar <sanil.kumar@...wei.com>,
	Masanari Iida <standby24x7@...il.com>,
	Li Zefan <lizefan@...wei.com>
Subject: Re: 3.5-rc3: BUG: Dentry still in use (1) [unmount of cgroup
 cgroup]

On Sun, Jun 24, 2012 at 07:08:07PM +0000, shyju pv wrote:
> Hi,
> Observed a crash on 3.5-rc3 with cgroup tests from LTP(Stable April,2012 release)on Dell Inspiron 1526[Intel(R) Core2Duo T7250, MEM 4GB] and also on another x86 quad core target(4GB RAM).
> LTP test case: cgroup_regression_test.sh(test 4,7 and 9 crashes randomly when the test cases are executed in order)
> Shyju
> 
> [  532.805905] BUG: Dentry ffff8801164db490{i=491b,n=/} still in use (1) [unmount of cgroup cgrou

Hmm... fa980ca87d "cgroup: superblock can't be released with active
dentries" is supposed to have fixed that.  Looking into it.

Thanks.

-- 
tejun
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