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Re: Dom0 starvs DomU
Manuel Bouyer <bouyer%antioche.eu.org@localhost> writes:
This did give me an idea, and I think I found a bug in the xbd backend.
It looks like the kernel thread is created with the wrong priority.
Could you try the attached patch ?
I could reproduce the problem creating a small loop around a syscall in dom0,
and the attached patch fixes the issue for me.
I put NetBSD 7-STABLE on a system (AMD K10 Thuban w 32 GiB RAM, high-end
SSD), pulled in 7-STABLE sources, applied your patch, built XEN3_DOM0,
and copied the newly compiled ./netbsd to /netbsd-XEN3_DOM0.
Before your patch, a ssh to a DomU on the system would time out every
time before I got in, if Dom0 is loaded by a compile. With the patch, I
can log into a DomU with less than 1 s of delay. It is even possible to
do an "ls -R /" without hangs...
Thanks, this should allow me to use a NetBSD Dom0!
--
Torbjörn
Please encrypt, key id 0xC8601622
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