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From: Viresh Kumar <viresh.kumar@linaro.org>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Jan Kara <jack@suse.cz>,
	Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Tejun Heo <tj@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	vlevenetz@mm-sol.com, vaibhav.hiremath@linaro.org,
	alex.elder@linaro.org, johan@kernel.org,
	akpm@linux-foundation.org, rostedt@goodmis.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Linux PM list <linux-pm@vger.kernel.org>
Subject: Re: [Query] Preemption (hogging) of the work handler
Date: Tue, 12 Jul 2016 06:02:31 -0700	[thread overview]
Message-ID: <20160712130231.GM4695@ubuntu> (raw)
In-Reply-To: <2571775.VuqrgkDp1o@vostro.rjw.lan>

On 12-07-16, 14:24, Rafael J. Wysocki wrote:
> On Monday, July 11, 2016 03:46:01 PM Viresh Kumar wrote:
> > Yeah and I am not sure how should I go ahead about this issue now :)
> 
> FWIW, I think the reason why the "synchronous printk" works is because after
> disabling the non-boot CPU, the only remaining one disables local interrupts
> and won't do any async work any more until resume.

Right. After disabling interrupts, the other printk messages gets
printed only after the system resumes. I am not that worried about
printk not working after that point, but on how does asynchronous
printing affect the system to crash or come to a complete hang?

Any clues on why that can happen ?

> But you started to talk about suspend/resume and such at one point and that
> message should have been CCed to linux-pm.
> 
> And the reason why is because problems you see during suspend/resume may very
> well be suspend-specific and not visible otherwise.  In which case you'll
> likely need input from the people on linux-pm.

Yeah, I *should* have cc'd the PM list then. Thanks for helping out
Rafael :)

-- 
viresh

  reply	other threads:[~2016-07-12 13:02 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20160701165959.GR12473@ubuntu>
     [not found] ` <2231804.EWgFb9e2VG@vostro.rjw.lan>
     [not found]   ` <20160711224601.GJ4695@ubuntu>
2016-07-12 12:24     ` [Query] Preemption (hogging) of the work handler Rafael J. Wysocki
2016-07-12 13:02       ` Viresh Kumar [this message]
2016-07-12 13:56         ` Petr Mladek
2016-07-12 14:04           ` Viresh Kumar
     [not found] ` <20160701172232.GD28719@htj.duckdns.org>
     [not found]   ` <20160706182842.GS2671@ubuntu>
     [not found]     ` <20160711102603.GI12410@quack2.suse.cz>
     [not found]       ` <20160711154438.GA528@swordfish>
     [not found]         ` <20160711223501.GI4695@ubuntu>
     [not found]           ` <20160712093805.GA498@swordfish>
     [not found]             ` <20160712125243.GA8597@pathway.suse.cz>
2016-07-12 13:12               ` Viresh Kumar
2016-07-12 17:11                 ` Viresh Kumar
2016-07-12 19:59                   ` Rafael J. Wysocki
2016-07-12 20:08                     ` Viresh Kumar
2016-07-13  7:00                   ` Sergey Senozhatsky
2016-07-13 12:05                     ` Rafael J. Wysocki
2016-07-13 12:57                       ` Sergey Senozhatsky
2016-07-13 13:22                         ` Rafael J. Wysocki
2016-07-12 23:19           ` Viresh Kumar
2016-07-13  0:18             ` Viresh Kumar
2016-07-13  5:45             ` Sergey Senozhatsky
2016-07-13 15:39               ` Viresh Kumar
2016-07-13 23:08                 ` Rafael J. Wysocki
2016-07-13 23:18                   ` Viresh Kumar
2016-07-13 23:38                     ` Greg Kroah-Hartman
2016-07-14  0:55                 ` Sergey Senozhatsky
2016-07-14  1:09                   ` Rafael J. Wysocki
2016-07-14  1:32                     ` Sergey Senozhatsky
2016-07-14 21:57                       ` Viresh Kumar
2016-07-14 21:55                   ` Viresh Kumar
2016-07-14 14:12               ` Jan Kara
2016-07-14 14:33                 ` Rafael J. Wysocki
2016-07-14 14:39                   ` Jan Kara
2016-07-14 14:47                     ` Rafael J. Wysocki
2016-07-14 14:55                       ` Jan Kara
2016-07-14 22:14                         ` Viresh Kumar
2016-07-14 14:34                 ` Sergey Senozhatsky
2016-07-14 15:03                   ` Jan Kara
2016-07-14 22:12                 ` Viresh Kumar
2016-07-18 11:01                   ` Jan Kara
2016-07-18 11:49                     ` Rafael J. Wysocki
2016-07-29 20:42               ` Viresh Kumar
2016-07-30  2:12                 ` Sergey Senozhatsky

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