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)
