Re: [PATCH BUGFIX] block, bfq: deschedule empty bfq_queues not referred by any process

Jens Axboe
2019-11-13T22:46:45Z

On 11/13/19 10:42 AM, Paolo Valente wrote:
>
>
>> Il giorno 13 nov 2019, alle ore 16:01, Oleksandr Natalenko <oleksandr@natalenko.name> ha scritto:
>>
>> On 13.11.2019 15:25, Oleksandr Natalenko wrote:
>>> I didn't try to switch schedulers, but what I see now is once the
>>> system is able to boot with BFQ, the I/O can still hang on I/O burst
>>> (which for me happens to happen during VM reboot).
>>> This may also not hang forever, but just slow down considerably. I've
>>> noticed this inside a KVM VM, not on a real HW.
>>
>> Possible call traces:
>
> Ok, you may have given me enough information, thank you very much.
>
> Could you please apply the attached (compressed) patch on top of my
> offending patch? For review purposes, here is the simple change:

FWIW, I dropped the previous patch.

--
Jens Axboe