Messages in this thread |  | | Date | Mon, 20 Nov 2006 09:49:06 +0100 | From | Heiko Carstens <> | Subject | Re: 2.6.19-rc6 -- dm: possible recursive locking detected |
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On Fri, Nov 17, 2006 at 07:43:03PM +0000, Alasdair G Kergon wrote: > 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:-)
Ignoring would be good, but this problem renders lockdep useless since it stops working after it found the first possible bug.
While we are at it:
this one is sitting since ages in -mm and probably waiting for your approval: http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.19-rc5/2.6.19-rc5-mm2/broken-out/md-dm-reduce-stack-usage-with-stacked-block-devices.patch - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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