On Tue, Nov 06, 2018 at 02:17:46PM +0800, Dongli Zhang wrote:
On 11/06/2018 01:49 AM, Eric Blake wrote:
On 11/2/18 3:11 AM, Dongli Zhang wrote:
Hi,
Is there any way to emulate I/O timeout on qemu side (not fault injection in VM kernel) without modifying qemu source code?
You may be interested in Rich's work on nbdkit. If you don't mind the overhead of the host connecting through NBD, then you can use nbdkit's delay and fault-injection filters for inserting delays or even run-time-controllable failures to investigate how the guest reacts to those situations
Thank you all very much for the suggestions. I will take a look on nbdkit.
These links should help: https://rwmj.wordpress.com/2018/09/04/nbdkit-for-loopback-pt-2-injecting-err... https://rwmj.wordpress.com/2018/09/06/nbdkit-for-loopback-pt-7-a-slow-disk/ This link shows how to combine delay and error filters together: https://rwmj.wordpress.com/2018/11/04/nbd-graphical-viewer/ Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW