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Subject: Re: 2.6.27.14: BUG: lock held when returning to user space!
From: Peter Zijlstra <peterz@infradead.org>
To: Frank van Maarseveen <frankvm@frankvm.com>
Cc: linux-kernel@vger.kernel.org, dm-devel@redhat.com,
       Alasdair G Kergon <agk@redhat.com>
In-Reply-To: <20090225142136.GA29505@janus>
References: <20090225142136.GA29505@janus>
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Date: Wed, 25 Feb 2009 17:29:49 +0100
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On Wed, 2009-02-25 at 15:21 +0100, Frank van Maarseveen wrote:
> An lvextend -L+16G command for a logical volume while being mounted rw
> as ext3 triggered the following on 2.6.27.14:
> 
> ================================================
> [ BUG: lock held when returning to user space! ]
> ------------------------------------------------
> lvextend/29191 is leaving the kernel with locks still held!
> 2 locks held by lvextend/29191:
>  #0: (&type->s_umount_key #15){....}, at: [<c019edfb>] get_super+0x6b/0xb0
>  #1: (&journal->j_barrier){....}, at: [<c01f9af3>] journal_lock_updates+0xc3/0xd0

Do recent kernels still say this?

CC'ed lvm folks.