Re: liburing test results on hppa

[Jens Axboe <axboe@kernel.dk>]

On 2/16/23 4:32 PM, Jens Axboe wrote:
> On 2/16/23 4:26?PM, John David Anglin wrote:
>> On 2023-02-16 6:12 p.m., Jens Axboe wrote:
>>> On 2/16/23 4:00?PM, John David Anglin wrote:
>>>> Running test buf-ring.t bad run 0/0 = -233
>>>> test_running(1) failed
>>>> Test buf-ring.t failed with ret 1
>>> As mentioned previously, this one and the other -233 I suspect are due
>>> to the same coloring issue as was fixed by Helge's patch for the ring
>>> mmaps, as the provided buffer rings work kinda the same way. The
>>> application allocates some aligned memory, and registers it and the
>>> kernel then maps it.
>>>
>>> I wonder if these would work properly if the address was aligned to
>>> 0x400000? Should be easy to verify, just modify the alignment for the
>>> posix_memalign() calls in test/buf-ring.c.
>> Doesn't help.  Same error.  Can you point to where the kernel maps it?
> 
> Yep, it goes io_uring.c:io_uring_register() ->
> kbuf.c:io_register_pbuf_ring() -> rsrc.c:io_pin_pages() which ultimately
> calls pin_user_pages() to map the memory.

Followup - a few of the provided buffer ring cases failed to properly
initialize the ring, poll-mshot-race was one of them... I've pushed out
fixes for this. Not sure if it fixes your particular issue, but worth
giving it another run.

-- 
Jens Axboe