linux-kernel - Re: [Query] Preemption (hogging) of the work handler

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Date:	Wed, 6 Jul 2016 15:23:48 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Tejun Heo <tj@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	vlevenetz@...sol.com, vaibhav.hiremath@...aro.org,
	alex.elder@...aro.org, johan@...nel.org, akpm@...ux-foundation.org,
	jack@...e.cz
Subject: Re: [Query] Preemption (hogging) of the work handler

On Wed, 6 Jul 2016 11:28:42 -0700
Viresh Kumar <viresh.kumar@...aro.org> wrote:


> 
> I tried looking at if something related to this changed between 3.10
> and mainline, and found few patches at least. One of the important
> ones is:
> 
> commit 5874af2003b1 ("printk: enable interrupts before calling
> console_trylock_for_printk()")
> 
> I wasn't able to backport it cleanly to 3.10 yet to see it makes thing
> work better though. But it looks like it was targeting similar
> problems.
> 

Do you have the same issues with latest mainline, or is this only a
3.10 issue?

-- Steve

> @Jan Kara, Right ?
> 
> Any other useful piece of advice/information you guys have? I see Jan,
> Andrew and Steven do a bunch of stuff in printk.c to make it better
> and so Cc'ing them.
>