[dm-devel] Re: 2.6.19-rc6 -- dm: possible recursive locking detected

[Alasdair G Kergon]

On Fri, Nov 17, 2006 at 04:30:03PM +0100, Heiko Carstens wrote:
> =============================================
> [ INFO: possible recursive locking detected ]
> 2.6.19-rc6-g1b9bb3c1 #28
> ---------------------------------------------
> kpartx/945 is trying to acquire lock:
>  (&md->io_lock){----}, at: [<00000000001f8faa>] dm_request+0x42/0x24c
> 
> but task is already holding lock:
>  (&md->io_lock){----}, at: [<00000000001f8faa>] dm_request+0x42/0x24c
 
Known problem - nobody's written a patch to fix it yet to my knowledge,
but I don't recall any reports of real world lock-ups related to this - just
several reports of the debug warning messages:-)

Simply ignore the message for now - or submit a patch that fixes the
underlying problem:-)

Alasdair
-- 
agk at redhat.com