Re: acb32a95a9: BUG: kernel hang in test stage

Re: acb32a95a9: BUG: kernel hang in test stage

[Johannes Weiner]

Hi,

On Thu, Apr 20, 2017 at 12:05:32AM +0800, kernel test robot wrote:
> Greetings,
> 
> 0day kernel testing robot got the below dmesg and the first bad commit is
> 
> git://git.cmpxchg.org/linux-mmotm.git master
> 
> commit acb32a95a90a6f88860eb344d04e1634ebbc2170
> Author:     mmotm auto import <mm-commits@vger.kernel.org>
> AuthorDate: Thu Apr 13 22:02:16 2017 +0000
> Commit:     Johannes Weiner <hannes@cmpxchg.org>
> CommitDate: Thu Apr 13 22:02:16 2017 +0000
> 
>     linux-next

Hm, you'd think the linux-next commit in the mm tree would produce
problems more often, but this is the first time I've seen it as the
culprit in a problem report.

Do problems usually get spotted inside linux-next.git first and then
the same issues are not reported against the -mm tree?

I also just noticed that <mm-commits@vger.kernel.org> might be a bad
author email since AFAIK it drops everything but akpm-mail. Andrew,
would it be better to set you as the Author of these import patches?
Easy enough to change my scripts.

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Re: acb32a95a9: BUG: kernel hang in test stage

[Andrew Morton]

On Wed, 19 Apr 2017 12:46:02 -0400 Johannes Weiner <hannes@cmpxchg.org> wrote:

> Hi,
> 
> On Thu, Apr 20, 2017 at 12:05:32AM +0800, kernel test robot wrote:
> > Greetings,
> > 
> > 0day kernel testing robot got the below dmesg and the first bad commit is
> > 
> > git://git.cmpxchg.org/linux-mmotm.git master
> > 
> > commit acb32a95a90a6f88860eb344d04e1634ebbc2170
> > Author:     mmotm auto import <mm-commits@vger.kernel.org>
> > AuthorDate: Thu Apr 13 22:02:16 2017 +0000
> > Commit:     Johannes Weiner <hannes@cmpxchg.org>
> > CommitDate: Thu Apr 13 22:02:16 2017 +0000
> > 
> >     linux-next
> 
> Hm, you'd think the linux-next commit in the mm tree would produce
> problems more often, but this is the first time I've seen it as the
> culprit in a problem report.
> 
> Do problems usually get spotted inside linux-next.git first and then
> the same issues are not reported against the -mm tree?
> 
> I also just noticed that <mm-commits@vger.kernel.org> might be a bad
> author email since AFAIK it drops everything but akpm-mail.

yup, that's how davem originally set it up.  It's never caused a
problem but it's a bit odd and I guess we could ask hmi to change it.

> Andrew,
> would it be better to set you as the Author of these import patches?
> Easy enough to change my scripts.

Sure, that works.

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Re: acb32a95a9: BUG: kernel hang in test stage

[Johannes Weiner]

On Wed, Apr 19, 2017 at 10:27:44AM -0700, Andrew Morton wrote:
> On Wed, 19 Apr 2017 12:46:02 -0400 Johannes Weiner <hannes@cmpxchg.org> wrote:
> 
> > Hi,
> > 
> > On Thu, Apr 20, 2017 at 12:05:32AM +0800, kernel test robot wrote:
> > > Greetings,
> > > 
> > > 0day kernel testing robot got the below dmesg and the first bad commit is
> > > 
> > > git://git.cmpxchg.org/linux-mmotm.git master
> > > 
> > > commit acb32a95a90a6f88860eb344d04e1634ebbc2170
> > > Author:     mmotm auto import <mm-commits@vger.kernel.org>
> > > AuthorDate: Thu Apr 13 22:02:16 2017 +0000
> > > Commit:     Johannes Weiner <hannes@cmpxchg.org>
> > > CommitDate: Thu Apr 13 22:02:16 2017 +0000
> > > 
> > >     linux-next
> > 
> > Hm, you'd think the linux-next commit in the mm tree would produce
> > problems more often, but this is the first time I've seen it as the
> > culprit in a problem report.
> > 
> > Do problems usually get spotted inside linux-next.git first and then
> > the same issues are not reported against the -mm tree?
> > 
> > I also just noticed that <mm-commits@vger.kernel.org> might be a bad
> > author email since AFAIK it drops everything but akpm-mail.
> 
> yup, that's how davem originally set it up.  It's never caused a
> problem but it's a bit odd and I guess we could ask hmi to change it.
> 
> > Andrew,
> > would it be better to set you as the Author of these import patches?
> > Easy enough to change my scripts.
> 
> Sure, that works.

Okay, fixed.

http://git.cmpxchg.org/cgit.cgi/linux-mmots.git/commit/?id=9cffa970e59a20315c8b73944dd93e37d2ecd785
vs.
http://git.cmpxchg.org/cgit.cgi/linux-mmots.git/commit/?id=c31d75472e61d0de0d9490bebd6d7167ae2eb5d6

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