Re: [PATCH v2 0/2] Fix hang in io_uring_get_cqe() with iopoll

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On 21/06/2020 21:48, Jens Axboe wrote:
> On 6/21/20 10:14 AM, Pavel Begunkov wrote:
>> v2: use relaxed load
>>     fix errata
>>
>> Pavel Begunkov (2):
>>   barriers: add load relaxed
>>   Fix hang in io_uring_get_cqe() with iopoll
>>
>>  src/include/liburing/barrier.h |  4 ++++
>>  src/queue.c                    | 16 +++++++++++++++-
>>  2 files changed, 19 insertions(+), 1 deletion(-)
> 
> After checking again, I think your liburing is quite a bit out-of-date.

It is. Apparently I checked out something old, my apologies.

> Can you check if the issue still exists in the current git tree?

This one is plumbed, though from a glance there is a similar problem
with non-iopoll mode and early wake by a timeout, rendering it to
idle-loop instead of sleeping. I'll leave it for a bit later.

-- 
Pavel Begunkov



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