linux-kernel - Re: [Xen-devel] [GIT PULL] (xen) stable/for-jens-3.14 : NFO: trying to register non-static key. the code is fine but needs lockdep annotation.

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Message-ID: <1542261541.20140211170750@eikelenboom.it>
Date:	Tue, 11 Feb 2014 17:07:50 +0100
From:	Sander Eikelenboom <linux@...elenboom.it>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	david.vrabel@...rix.com, roger.pau@...rix.com, mrushton@...zon.com,
	<msw@...zon.com>, <boris.ostrovsky@...cle.com>,
	Jens Axboe <axboe@...nel.dk>, <xen-devel@...ts.xensource.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [GIT PULL] (xen) stable/for-jens-3.14 : NFO: trying to register non-static key. the code is fine but needs lockdep annotation.


Tuesday, February 11, 2014, 4:56:50 PM, you wrote:

> On Tue, Feb 11, 2014 at 04:52:15PM +0100, Sander Eikelenboom wrote:
>> Hi Konrad,
>> 
>> Today decided to tryout another kernel RC and your pull request to Jens on top of it .. and I encoutered this one:

> Thank you for testing!

> Could you provide the .config file please?

Attached

> Did you see this _before_ the pull request with Jens? I presume
> not, but just double checking?

Nope not too my knowledge (though it's a bit messy with things broken on 3.14 at the moment)

> And lastly - what were you doing when you triggered this? Just launching
> a guest?

Nope it triggers on guest shutdown ..


> CC-ing Roger and other folks who were on the patches.

>> 
>> 
>> [  438.029756] INFO: trying to register non-static key.
>> [  438.029759] the code is fine but needs lockdep annotation.
>> [  438.029760] turning off the locking correctness validator.
>> [  438.029770] CPU: 3 PID: 9593 Comm: blkback.2.xvda Tainted: G        W    3.14.0-rc2-20140211-pcireset-net-btrevert-xenblock+ #1
>> [  438.029773] Hardware name: MSI MS-7640/890FXA-GD70 (MS-7640)  , BIOS V1.8B1 09/13/2010
>> [  438.029784]  ffff88005224c4f0 ffff88004e5d9b68 ffffffff81b808c4 ffff88004ba2b510
>> [  438.029791]  0000000000000002 ffff88004e5d9c38 ffffffff81116eab ffff88004e5d9bf8
>> [  438.029798]  ffffffff81117b35 0000000000000000 0000000000000000 ffffffff82cee570
>> [  438.029799] Call Trace:
>> [  438.029815]  [<ffffffff81b808c4>] dump_stack+0x46/0x58
>> [  438.029826]  [<ffffffff81116eab>] __lock_acquire+0x1c2b/0x2220
>> [  438.029833]  [<ffffffff81117b35>] ? lock_acquire+0xe5/0x150
>> [  438.029841]  [<ffffffff81117b0d>] lock_acquire+0xbd/0x150
>> [  438.029847]  [<ffffffff810e5965>] ? flush_work+0x5/0x290
>> [  438.029852]  [<ffffffff810e599d>] flush_work+0x3d/0x290
>> [  438.029856]  [<ffffffff810e5965>] ? flush_work+0x5/0x290
>> [  438.029863]  [<ffffffff81117b35>] ? lock_acquire+0xe5/0x150
>> [  438.029872]  [<ffffffff816fef01>] ? xen_blkif_schedule+0x1a1/0x8d0
>> [  438.029881]  [<ffffffff81b8ae0d>] ? _raw_spin_unlock_irqrestore+0x6d/0x90
>> [  438.029888]  [<ffffffff8111392b>] ? trace_hardirqs_on_caller+0xfb/0x240
>> [  438.029894]  [<ffffffff81113a7d>] ? trace_hardirqs_on+0xd/0x10
>> [  438.029901]  [<ffffffff816fefe9>] xen_blkif_schedule+0x289/0x8d0
>> [  438.029907]  [<ffffffff8110d510>] ? __init_waitqueue_head+0x60/0x60
>> [  438.029913]  [<ffffffff81113a7d>] ? trace_hardirqs_on+0xd/0x10
>> [  438.029919]  [<ffffffff81b8ae21>] ? _raw_spin_unlock_irqrestore+0x81/0x90
>> [  438.029925]  [<ffffffff816fed60>] ? xen_blkif_be_int+0x40/0x40
>> [  438.029932]  [<ffffffff810ee374>] kthread+0xe4/0x100
>> [  438.029938]  [<ffffffff81b8afe0>] ? _raw_spin_unlock_irq+0x30/0x50
>> [  438.029946]  [<ffffffff810ee290>] ? __init_kthread_worker+0x70/0x70
>> [  438.029951]  [<ffffffff81b8c1fc>] ret_from_fork+0x7c/0xb0
>> [  438.029958]  [<ffffffff810ee290>] ? __init_kthread_worker+0x70/0x70
>> 
>> Doesn't seem to serious .. but never the less :-)
>> 
>> --
>> 
>> Sander
>> 
>> 
>> Monday, February 10, 2014, 8:54:02 PM, you wrote:
>> 
>> > On Mon, Feb 10 2014, Konrad Rzeszutek Wilk wrote:
>> >> Hey Jens,
>> >> 
>> >> Please git pull the following branch:
>> >> 
>> >>  git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git stable/for-jens-3.14
>> >> 
>> >> which is based off v3.13-rc6. If you would like me to rebase it on
>> >> a different branch/tag I would be more than happy to do so.
>> 
>> > Older is fine, it's only an issue if you are ahead of the branch you
>> > want to go into.
>> 
>> dd>> 
>> >> The patches are all bug-fixes and hopefully can go in 3.14.
>> >> 
>> >> They deal with xen-blkback shutdown and cause memory leaks
>> >> as well as shutdown races. They should go to stable tree and if you
>> >> are OK with I will ask them to backport those fixes.
>> >> 
>> >> There is also a fix to xen-blkfront to deal with unexpected state
>> >> transition. And lastly a fix to the header where it was using the
>> >> __aligned__ unnecessarily.
>> 
>> > Pulled!
>> 
>> 
>> --
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