Re: [PATCH liburing 1/1] test/defer: Test deferring with drain and links

From: Jens Axboe
Date: Fri Oct 25 2019 - 11:47:16 EST

On 10/25/19 9:40 AM, Pavel Begunkov wrote:
> On 25/10/2019 18:13, Jens Axboe wrote:
>> On 10/25/19 3:48 AM, Pavel Begunkov (Silence) wrote:
>>> From: Pavel Begunkov <asml.silence@xxxxxxxxx>
>>> 1. test user_data integrity with cancelled links
>>> 2. test the whole link is cancelled by sq_thread
>>> 3. hunging io_uring based on koverflow and kdropped
>>> Be aware, that this test may leave unkillable user process, or
>>> unstopped actively polling kthread.
>> That's fine, that's what the test suite is for! Thanks, applied.
> Just found it "a bit uncomfortable", that after several runs
> my CPU was doing nothing but polling in vain.

Looks like it's testing one of the cases that isn't fixed that. We
shouldn't do that until a known fix is available, at least. Basically
the tests should test for things that used to be a problem, but are
now fixed.

But let's just get it fixed :-)

Jens Axboe