On 15/10/2020 10:44, Maor Gottlieb wrote:
>
> On 10/15/2020 1:51 AM, Jason Gunthorpe wrote:
>> On Tue, Oct 13, 2020 at 09:33:14AM -0500, Bob Pearson wrote:
>>> Jason,
>>>
>>> Just pulled for-next and now hit the following warning.
>>> Register user space memory is not longer working.
>>> I am trying to debug this but if you have any idea where to look let me know.
>> The offset_in_page is wrong, but it is protecting some other logic..
>>
>> Maor? Leon? Can you sort it out tomorrow?
>
> Leon and I investigated it. This check existed before my series to protect the
> alloc_table_from_pages logic. It's still relevant.
> This patch that broke it: 54816d3e69d1 ("RDMA: Explicitly pass in the
> dma_device to ib_register_device"), and according to below link it was
> expected. The safest approach is to set the max_segment_size back the 2GB in
> all drivers. What do you think?
>
> https://lore.kernel.org/linux-rdma/20200923072111.GA31828@xxxxxxxxxxxxx/
FWIW, EFA is broken as well (same call trace) so it's not just software drivers.
