Stefan Hajnoczi

A fair amount of the development work I do is related to storage performance in QEMU/KVM. Although I have written about disk I/O benchmarkin...

The PDF slides for my "Bring Your Own Virtual Devices: Frameworks for Software and Hardware Device Virtualization" talk from the ...

As 2011 comes to an end I want to look back at the highlights from the QEMU community this year. Development progress feels good, the maili...

It's pretty common to need to copy files between a virtual machine and the host. This can be drivers or installers from the host into t...

This post explains how vhost provides in-kernel virtio devices for KVM. I have been hacking on vhost-scsi and have answered questions about...

KVM Forum 2011 was co-located with LinuxCon North America in Vancouver, Canada. KVM Forum ran Monday and Tuesday, 16 & 17 of August an...

Update: These links no longer work. For a more recent overview of KVM's architecture, check out the slides available here . Earlier t...

I had the opportunity to attended LinuxCon Japan 2011 in Yokohama. The conference ran many interesting talks, with a virtualization mini-su...

Update: Added link to Mark Wagner's KVM Performance Improvements and Optimizations slides that Andrew Cathrow posted on IRC. This ye...

This post describes how to save a packet capture of the network traffic a QEMU virtual machine sees. This feature is built into QEMU and w...

Mike Roth has just posted a nice guide to getting started with KVM-Autotest , the suite of acceptance tests that can be run against KVM. KV...

An entire virtual machine configuration can be passed on QEMU's extensive command-line, including everything from PCI slots to CPU feat...

The IBM Best practices for KVM document covers storage, networking, and memory/CPU overcommit tuning. If you are looking for known good co...

It is sometimes useful to issue QEMU monitor commands to VMs managed by libvirt. Since libvirt takes control of the monitor socket it is no...

This post shows how to write a Python script that finds overlapping disk writes in a QEMU simple trace file. Several trace backends, inclu...

Last week I started the QEMU Internals series to share knowledge of how QEMU works. I dove straight in to the threading model without a h...

This is the first post in a series on QEMU Internals aimed at developers. It is designed to share knowledge of how QEMU works and make it e...

UPDATE: The qemu-kvm.git fork has been merged back into qemu.git as of QEMU 1.3.0. Always use qemu.git for the latest code. See my full p...

I am going to explain how to mount or access virtual machine disk images from the host using qemu-nbd . Often you want to access an image...

I am going to describe the tracing feature in the QEMU and KVM. Overview of QEMU tracing Tracing is available for the first time in QEM...