Re: [PATCH] Fix a bdi reregistration race, v3

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On 05/05/2016 04:40 PM, Joe Lawrence wrote:
> On 05/05/2016 03:58 PM, Bart Van Assche wrote:
>> On 03/28/2016 02:29 PM, Bart Van Assche wrote:
>>> Avoid that the sd driver registers a BDI device with a name that
>>> is still in use. This patch avoids that the following warning gets
>>> triggered:
>>>
>>> [ ... ]
>>
>> (replying to my own e-mail)
>>
>> If anyone could review this patch that would be very welcome.
> 
> Hi Bart,
> 
> I *think* I may be hitting this same problem running some tests here at Stratus
> ... snip...


Hi Bart,

Good news = With your v3 patch, I didn't see the "sysfs: cannot create
duplicate filename '/devices/virtual/bdi/65:0'" warning during my
weekend testing (573 surprise disk HBA removals).

Bad news = I still crashed in add_disk > sysfs_create_link >
sysfs_do_create_link_sd on a NULL target_kobj->sd ... unfortunately I
don't have kdump working, so all I have is a serial console output to
work with for now.

Regards,

-- Joe
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