[libvirt] [PATCH RFC] iohelper: Introduces a small sleep do avoid hunging other tasks

[Daniel P. Berrangé]

On Thu, May 09, 2019 at 05:59:36PM -0300, Leonardo Bras wrote:
> While dumping very large VMs (over 128GB), iohelper seems to cause
> very intense IO usage on the disk, and it causes some processes
> (like journald) to hung, and depending on kernel configuration,
> to panic.

What causes a panic here ?

This just sounds like a I/O schedular issue in the end. The
storage can't cope with the huge data sizes and the kernel is
not fairly giving time to other processes. Surely the answer
here is to tune the kernel params to improve I/O fairness

Regards,
Daniel
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