linux-kernel - Re: [sched/balance] INFO: possible recursive locking detected

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Date:	Thu, 13 Mar 2014 17:06:54 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Alex Shi <alex.shi@...aro.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [sched/balance] INFO: possible recursive locking detected

On Thu, Mar 13, 2014 at 05:00:11PM +0800, Alex Shi wrote:
> On 03/13/2014 04:53 PM, Fengguang Wu wrote:
> > On Thu, Mar 13, 2014 at 03:43:11PM +0800, Alex Shi wrote:
> >> On 03/03/2014 10:25 PM, Fengguang Wu wrote:
> >>> Greetings,
> >>>
> >>> I got the below dmesg and the first bad commit is
> >>>
> >>> https://github.com/alexshi/power-scheduling.git single-balance.bak
> >>> commit 2adc591a5cb6768ad11e63be9011906aa171148d
> >>> Author:     Alex Shi <alex.shi@...aro.org>
> >>> AuthorDate: Fri Feb 28 15:25:09 2014 +0800
> >>> Commit:     Alex Shi <alex.shi@...aro.org>
> >>> CommitDate: Sun Mar 2 09:16:38 2014 +0800
> >>>
> >>>     sched/balance: replace new_idle_balance
> >>>     
> >>>     Curren idle_balance will pull task on half of this group. That is
> >>>     not needed in central balance.
> >>
> >>
> >> Thanks for your testing, Fengguang!
> >>
> >> I fixed this issue and updated to the git tree. Is the single-balance
> >> branch still in your performance radar? :)
> > 
> > Sure, however you know it's costly to queue tests for one single tree.
> > If your trees are directly based on -rcX kernels, that would cut the
> > tests required for comparison by half.
> 
> Thanks a lot! I will keep in mind for this point.
> rebased on rc6 kernel for that branch. :)

That's great!

> Thanks again for generous help!

You are welcome. I've queued alexshi/single-balance for testing.

Thanks,
Fengguang
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