Qemu revisited



I mentioned Qemu a short while back. I’ve used it in the past for testing linux livecds. After doing the writeup though I was encouraged to look at it again and see if/how much it’s improved since I last got an update. Wow….


For starters, I spent a bit of hairpulling but got the kqemu module working this time. kqemu is an accelerator module that interfaces directly with the kernel. It’s purported that qemu without the accelerator is 5-10x slower than the host machine, WITH the accelerator it’s in the ballpark of 1-2x slower. Not bad. I did try it and am impressed with the acceleration.

My test install was Windows 98 second edition. I installed to a 1 GB hard drive image and must say it performed as well as my old copy of Win4lin. I haven’t tried anything too fancy, but I did attempt starting qemu with the -user-net option which gave me easy seamless access to the internet from within the qemu OS. Very nice. I also tried it out with several other images (mostly cds) that I’ve collected.

One interesting feature of qemu is the ability to boot an existing disc or drive. For instance, you have an old dos boot floppy in your 3.5 inch drive, you can use qemu to boot from it, or your cdrom, or a hard drive. Obviously you want to be cautious about this on the primary drive, ( -snapshot is a handy switch), but it’s possible to do things which I would have otherwise thought were just impossible.

As I’ve said there is a windows version out now, although it’s in testing. It can really save you a lot of rebooting especially if you’re into testing or developing livecds. There is also a site called Free OS zoo, which provides some images for download of freely available (and distributable) operating systems. So you’ll find several linux variants there, some bsd variations and one darwin install (that I ran into some problems trying to untar.) These images will essentially save you from creating your own image and booting qemu up with “install media” and building it yourself. I think the free os zoo is an idea that REALLY could be expanded.

I didn’t get to play around with much more advanced networking because I discovered a strange problem with the tun driver on my desktop workstation. I’ll have to sort that out before I can get anything fancier than -user-net going.

Related Posts

Blog Traffic Exchange Related Posts
  • Ubuntu 6.06 LTS release Probably the biggest news so far today, at least in linux circles is the official release of the Dapper Drake.... Ubuntu 6.06 LTS (Long Term Support) (and kubuntu and edubuntu all...). I've been playing with an install based on the Release Candidate (and now upgraded to even include KDE 3.5.3...........
  • QEMU with KQemu accelerator module I've been playing around with qemu lately and there is a little tip I ran into that helps in getting the kqemu module running if you have Win4lin installed. This is from the Win4Lin support because THEIR module could conflict with it. They suggest the following. mknod -m 0666 /dev/kqemu......
  • Windows XP Unable to Login After Cleaning Out Rogue Antivirus This article may come in handy if you are out there battling the latest rogue du jour. Occasionally I have been through a cleaning process for these rogues and got to a point where the scanner had run and cleaned things out (whether it was malwarebytes antimalware or superantispyware.) It......
Blog Traffic Exchange Related Websites
  • How to Install Window Boxes Window boxes add charm to any home and they are so easy to install that anyone can do it. You're going to need to get a few things together before you get started. Your tools will include: window box brackets a level that is longer than the window box you......
  • 6 Ways Windows Has Improved Computing This is a guest post! If you want to write for us, check out the Guest Post section. Microsoft Windows is a product that everyone seems to take pleasure in hating. Comments like ‘It’s trying to do too much!’ or ‘It takes too long to load…’ are commonly heard when......
  • Stamp Collection Software [/caption]There are many different types of stamp collection software that are efficient and will help you value, organize, and track your collection quickly and more easily, making the task more of a hobby than work because it will be enjoyable. The best stamp inventory program that is used in managing......
www.pdf24.org    Send article as PDF   

Similar Posts


See what happened this day in history from either BBC Wikipedia
Search:
Keywords:
Amazon Logo

Comments are closed.


Switch to our mobile site