Re: uas: kernel BUG at block/blk-tag.c:89 is back again :|

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 07/07/2014 12:10 PM, Christoph Hellwig wrote:
> On Sun, Jul 06, 2014 at 02:24:03PM +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 07/03/2014 08:01 AM, Christoph Hellwig wrote:
>>> Hi Hans,
>>>
>>> please test the path below:
>>
>> Note, I did a similar patch a while back, but then it was decided to
>> try and fix the tear-down ordering instead (which seems to have not
>> completely fixed the issue).
> 
> I can't see any sensible way to "fix" the issue.  Struct gendisk keeps a
> reference to the requeue_queue, and a struct gendisk reference is held
> as long as the block device is open.  So whenever you surprise remove a
> device that is open (usually by having a filesystem mounted on it),
> the request_queue and it's reference to the tag structure will vastly
> outlive the Scsi_Host.

Ok, so can we then please move forward with getting your patch merged ?

Thanks,

Hans