Re: [LKP] 3f906ba236 [ 71.192813] WARNING: possible circular locking dependency detected

[Rong Chen]

On 09/05/2018 09:02 PM, Thomas Gleixner wrote:
> On Wed, 5 Sep 2018, kernel test robot wrote:
>
> > Greetings,
> >
> > 0day kernel testing robot got the below dmesg and the first bad commit is
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> >
> > commit 3f906ba23689a3f824424c50f3ae937c2c70f676
> > Author:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> > AuthorDate: Mon Jul 10 15:50:09 2017 -0700
> > Commit:     Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> > CommitDate: Mon Jul 10 16:32:33 2017 -0700
> So it identified a more than one year old commit. Great.
>
> > vm86 returned ENOSYS, marking as inactive. 20044 iterations. [F:14867 S:5032 HI:3700] [ 57.651003] synth uevent: /module/pcmcia_core: unknown uevent action string [ 71.189062] [ 71.191953] ====================================================== [ 71.192813] WARNING: possible circular locking dependency detected [ 71.193664] 4.12.0-10480-g3f906ba #1 Not tainted [ 71.194355] ------------------------------------------------------ [ 71.195211] trinity-c0/1666 is trying to acquire lock: [ 71.195958] (mem_hotplug_lock.rw_sem){.+.+.+}, at: show_slab_objects+0x14b/0x440 [ 71.197284] [ 71.197284] but task is already holding lock:
> along with completely unparseable information. What am I supposed to do
> with this mail?
Hi,

Attached please find the dmesg/reproduce files in previous mail.
please ignore the report if it's a false positive.

Best Regards,
Rong Chen

> Thanks,
>
> 	tglx
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