Am 27.06.2011 18:08, schrieb Andi Kleen: > On Mon, Jun 27, 2011 at 05:59:41PM +0200, Kevin Wolf wrote: >> Am 23.06.2011 01:36, schrieb Andi Kleen: >>> >>> Running LTP testcases/kernel/io/direct_io/test_dma_thread_diotest7 >>> causes IO errors in the guest. There are no IO errors on the host. >>> >>> Kernel Linux 3.0.0-rc* >>> Using a standard emulated IDE -hda image. >> >> Couldn't reproduce this in a quick test with a random guest I had >> available. What is your complete qemu command line? Is the problem new > > -m 1500M -smp 2 \ > -hda ~/qemu/suse-11.1-64.img \ > -kernel arch/x86/boot/bzImage -append "root=/dev/sda1 debug $EXTRA" "$@" > > Could it be related to the image? > > suse11.3-64.img: Qemu Image, Format: Qcow , Version: 1 , Disk Size could be: > 83886080 * 256 bytes
Oh, this is a qcow1 image? Interesting, I didn't expect that people are still using this format. :-) Definitely worth trying a raw image or at least qcow2. The old qcow1 format driver hasn't been actively maintained for quite a while now. >> with the 3.0 RCs or does it also happen with kernels that my existing >> guests are likely to have in use - say, the F15 kernel? > > It happened on older kernels too. >> >> I guess with virtio-blk you don't see the problems? > > Will try later. Ok, thanks. It looked like an IDE problem at first, but now that you mention it's a qcow1 image, I think it could just as well be an image format driver bug. Kevin
