* Regression, bisected: hyperv shutdown panics guest
@ 2013-02-07 10:54 Florian Westphal
2013-02-07 12:43 ` KY Srinivasan
0 siblings, 1 reply; 2+ messages in thread
From: Florian Westphal @ 2013-02-07 10:54 UTC (permalink / raw)
To: Feng Hong; +Cc: ebiederm, Kees Cook, linux-kernel, kys, haiyangz
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
^ permalink raw reply [flat|nested] 2+ messages in thread
* RE: Regression, bisected: hyperv shutdown panics guest
2013-02-07 10:54 Regression, bisected: hyperv shutdown panics guest Florian Westphal
@ 2013-02-07 12:43 ` KY Srinivasan
0 siblings, 0 replies; 2+ messages in thread
From: KY Srinivasan @ 2013-02-07 12:43 UTC (permalink / raw)
To: Florian Westphal, Feng Hong
Cc: ebiederm, Kees Cook, linux-kernel, Haiyang Zhang
> -----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
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-02-07 10:54 Regression, bisected: hyperv shutdown panics guest Florian Westphal
2013-02-07 12:43 ` KY Srinivasan
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