On Mon, Aug 25, 2014 at 09:48:31PM +, KY Srinivasan wrote:
>
> > There is also a case of the BUG_ON at line 460 being hit (from
> > https://lkml.org/lkml/2014/8/19/708 ):
> >
> > 457ret = vmbus_post_msg(msg,
> > 458 sizeof(struct
> > vmbus_channe
.@vger.kernel.org; de...@linuxdriverproject.org; Haiyang Zhang
> Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>
> On Mon, Aug 25, 2014 at 12:36:48PM +0300, Dan Carpenter wrote:
> > The code here is:
> >
> > drivers/hv/channel.c
> >
On Mon, Aug 25, 2014 at 12:36:48PM +0300, Dan Carpenter wrote:
> The code here is:
>
> drivers/hv/channel.c
>460 BUG_ON(ret != 0);
>461 t = wait_for_completion_timeout(&info->waitevent, 5*HZ);
>462 BUG_ON(t == 0);
>
There is also a case of the BUG_ON at lin
et...@vger.kernel.org; de...@linuxdriverproject.org; Haiyang Zhang
> Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>
> On Mon, Aug 25, 2014 at 05:34:27PM +, KY Srinivasan wrote:
> >
> >
> > > -Original Message-
> > > From
-Hartman; Jason Wang; linux-
> > ker...@vger.kernel.org; David S. Miller; Daniel Borkmann;
> > net...@vger.kernel.org; de...@linuxdriverproject.org; Haiyang Zhang
> > Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
> >
> > The code here is:
.@vger.kernel.org; de...@linuxdriverproject.org; Haiyang Zhang
> Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>
> The code here is:
>
> drivers/hv/channel.c
>460 BUG_ON(ret != 0);
>461 t = wait_for_completion_timeout(&in
Borkmann; David S. Miller;
> net...@vger.kernel.org
> Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>
> Am 25.08.2014 16:53, schrieb KY Srinivasan:
> >
> >
> >> -Original Message-
> >> From: Richard Weinberger [mailt
man;
>> de...@linuxdriverproject.org; linux-kernel@vger.kernel.org; Jason Wang;
>> Daniel Borkmann; David S. Miller; net...@vger.kernel.org
>> Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>>
>> via
>>
>>
>> On Wed, Aug
son Wang;
> Daniel Borkmann; David S. Miller; net...@vger.kernel.org
> Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>
> via
>
>
> On Wed, Aug 20, 2014 at 5:41 AM, Sitsofe Wheeler
> wrote:
> > Aug 20 04:04:41 ubuntuhv kernel: [9.2
via
On Wed, Aug 20, 2014 at 5:41 AM, Sitsofe Wheeler wrote:
> Aug 20 04:04:41 ubuntuhv kernel: [9.230399] random: nonblocking pool is
> initialized
> Aug 20 04:04:41 ubuntuhv kernel: [ 10.338487] EXT4-fs (sda1): re-mounted.
> Opts: errors=remount-ro
> Aug 20 04:04:41 ubuntuhv kernel: [
The code here is:
drivers/hv/channel.c
460 BUG_ON(ret != 0);
461 t = wait_for_completion_timeout(&info->waitevent, 5*HZ);
462 BUG_ON(t == 0);
So it calls BUG_ON() if the teardown takes more than 5 seconds. It's
most likely that there is a race condition somewh
linuxdriverproject.org;
> > linux-kernel@vger.kernel.org; Jason Wang; Daniel Borkmann; David S.
> > Miller; net...@vger.kernel.org
> > Subject: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
> >
> > Now we get to the issue I've been meaning to report:
d S.
> Miller; net...@vger.kernel.org
> Subject: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU
>
> Now we get to the issue I've been meaning to report: changing the MTU of
> a Hyper-V network interface while traffic is flowing through it triggers
> a BUG. I&#x
Now we get to the issue I've been meaning to report: changing the MTU of
a Hyper-V network interface while traffic is flowing through it triggers
a BUG. I've seen this happen on a variety of kernels but the trace below
is from 3.17.0-rc1.
Steps to reproduce:
(Guests were customised Fedora 20 cloud
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