lkml.org 
[lkml]   [2013]   [Feb]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: Regression, bisected: hyperv shutdown panics guest
Date


> -----Original Message-----
> From: Florian Westphal [mailto:fw@strlen.de]
> Sent: Thursday, February 07, 2013 5:54 AM
> To: Feng Hong
> Cc: ebiederm@xmission.com; Kees Cook; linux-kernel@vger.kernel.org; KY
> Srinivasan; Haiyang Zhang
> Subject: Regression, bisected: hyperv shutdown panics guest
>
> With 3.7, hyperv guest shutdown no longer works.
> Instead, guest kernel throws a bunch of "BUG: scheduling-while-atomic"
> errors and then dies.
>
> reverting
>
> commit 6c0c0d4d1080840eabb3d055d2fd81911111c5fd
> Author: hongfeng <hongfeng@marvell.com>
> Date: Thu Oct 4 17:12:25 2012 -0700
> poweroff: fix bug in orderly_poweroff()
>
> fixes this problem.
>
> Greping for users of orderly_poweroff() shows that hyperv isn't
> the only caller that invokes the function from irq context.
>
> In fact, kdoc for orderly_poweroff says:
>
> * This may be called from any context to trigger a system shutdown.
> * If the orderly shutdown fails, it will force an immediate shutdown.
>
> Any suggestions on how to properly fix this?
>
> Thanks,
> Florian
>

A patch has been submitted to fix this problem. It is in Greg's queue:
Subject: Re: [PATCH 6/6] Drivers: hv: Execute shutdown in a thread context


Regards,

K. Y



\
 
 \ /
  Last update: 2013-02-07 14:21    [W:0.075 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site