Messages in this thread | | | Date | Wed, 13 Nov 2019 15:25:14 +0100 | From | Oleksandr Natalenko <> | Subject | Re: [PATCH BUGFIX] block, bfq: deschedule empty bfq_queues not referred by any process |
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On 13.11.2019 14:52, Paolo Valente wrote: >> I'm not sure if I see things right, but this commit along with v5.3.11 >> kernel causes almost all boots to hang (for instance, on mounting the >> FS). Once the scheduler is changed to something else than BFQ (I set >> the I/O scheduler early via udev rule), multiple reboots go just fine. >> > > If you switch back to bfq after the boot, can you still reproduce the > hang?
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.
>> Is this commit also applicable to 5.3 kernels? > > It is.
OK, thanks for clarification.
-- Oleksandr Natalenko (post-factum)
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