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-errors/ 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
