lkml.org 
[lkml]   [2011]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe:RE: [PATCH 08/25] Staging: hv: vmbus_driver cannot be unloaded; cleanup accordingly
unsubscribe linux-kernel
At 2011-04-27 10:31:18,"KY Srinivasan" <kys@microsoft.com> wrote:
>
>
>> -----Original Message-----
>> From: Greg KH [mailto:greg@kroah.com]
>> Sent: Tuesday, April 26, 2011 6:46 PM
>> To: KY Srinivasan
>> Cc: gregkh@suse.de; linux-kernel@vger.kernel.org;
>> devel@linuxdriverproject.org; virtualization@lists.osdl.org; Haiyang Zhang;
>> Abhishek Kane (Mindtree Consulting PVT LTD)
>> Subject: Re: [PATCH 08/25] Staging: hv: vmbus_driver cannot be unloaded;
>> cleanup accordingly
>>
>> On Tue, Apr 26, 2011 at 09:20:25AM -0700, K. Y. Srinivasan wrote:
>> > The vmbus driver cannot be unloaded; the windows host does not
>> > permit this. Cleanup accordingly.
>>
>> Woah, you just prevented this driver from ever being able to be
>> unloaded.
>
>It was never unloadable; while the driver defined an exit routine,
>there were couple of issues unloading the vmbus driver:
>
>1) All guest resources given to the host could not be recovered.
>
>2) Windows host would not permit reloading the driver without
>rebooting the guest.
>
>All I did was acknowledge the current state and cleanup
>accordingly. This is not unique to Hyper-V; for what it is worth,
>the Xen platform_pci driver which is equivalent to the vmbus driver
>is also not unlodable (the last time I checked).
>
>>
>> That's not a "cleanup" that's a major change in how things work. I'm
>> sure, if you want to continue down this line, there are more things you
>> can remove from the code, right?
>>
>> What is the real issue here? What happens if you unload the bus? What
>> goes wrong? Can it be fixed?
>
>This needs to be fixed on the host side. I have notified them of the issue.
>
>>
>> This is a pretty big commitment...
>
>These drivers only load when Linux is hosted on a Hyper-V platform;
>I am not sure why it is a "big commitment" given that the host does not
>permit reloading this driver without rebooting the guest.
>
>Regards,
>
>K. Y
>
>--
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at http://vger.kernel.org/majordomo-info.html
>Please read the FAQ at http://www.tux.org/lkml/
>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-04-27 07:29    [W:3.453 / U:0.284 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site