QEMU: Disk Access Abnormally Slow with Linux Guests (DSC timeout)

[Juergen Lock]

In article <45A1F4B3.3000204 at pldrouin.net> you write:
>I have tried to boot many different Linux boot CD images with QEMU under 
>FreeBSD 6-stable. With all the boot CD images I have tried, I always see 
>a lot of "hdb: DSC timeout" messages and it takes forever to boot (~45 
>minutes). The CPU usage is very low most of the time, and the hard drive 
>does not seam to work very hard...
>
>I am using the latest qemu + kqemu-kmod ports and did not experience 
>that kind of problem with a Win2k guest

Hmm, it seems this is fallout from the -disk patch, which has been
backed out in qemu in the meantime:

-----snip---
Date: 2007-01-07 20:42:14 +0000

Revert -disk patch, as requested by Fabrice. The general idea of this
patch is sound, but the implementation is just too ugly.
-----snip---

 So this should be fixed with the next update.  (Tho that may still
take a bit since I'm still waiting for resolution on another bug,
slirp `sometimes' not working right anymore, see other post.)

 Actually...  If this takes longer than expected I'm thinking of
adding back qemu 0.8.2 as a qemu-stable port, do people want that?
Two bugs in such a short time is a bit much I'd say... :/

	Juergen