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Re: Xen3 DomU spins 100% busy during console access



On Mon, Dec 04, 2006 at 04:46:25PM +0100, Manuel Bouyer wrote:
> On Mon, Dec 04, 2006 at 09:10:37PM +0900, Kazushi Marukawa wrote:
> >    On Dec 3, 16:45, Simon Truss wrote:
> >    > Subject: Xen3 DomU spins 100% busy during console access
> >    > I was in vim in insert mode and just pasted a large selection into the 
> >    > xenconsole - instant busy lockup. Once I figured out what caused it I 
> >    > was able to repeat this 5 out of 5 times.
> > 
> > Check this thread and this bugzilla.  Maybe these are
> > related to your problem.
> > 
> >   http://lists.xensource.com/archives/html/xen-devel/2006-03/msg01376.html
> >   http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=477
> > 
> > Their usleep patch (listed in bugzilla page) is not applyed
> > to our pkgsrc/sysutils/xentools30.  Not sure why.
> 
> The right fix is:
> http://xenbits.xensource.com/xen-unstable.hg?cs=7c994d80049c
> 
> and it's part of xen-3.0.3, no patch needed.

Pasting a large amount of data into a console does not spin the
cpu up to 100% utilization.  That portion of the fix is, in fact,
correct.

However, none of the data appears, and i cannot ^] my way out of
the console.  any active ssh sessions become non-responsive.

When i 'xm destroy' the domu, the data i pasted appears on the
dom0's ssh session.  (i'm ssh'd into the dom0, and execute the
console from there)

xen-test# uname -a
NetBSD xen-test.dsrw.org 4.99.4 NetBSD 4.99.4 (XEN3_DOM0) #0: Mon
Nov 27 04:32:34 CST 2006
dlg%build-31.dsrw.org@localhost:/local/src/HEAD/src/sys/arch/i386/compile/obj/XEN3_DOM0
i386
xen-test# pkg_info | grep xen
xenkernel30-3.0.3   Xen3 Kernel
xentools30-3.0.3nb1 Userland Tools for Xen
xen-test# 

  --david


> 
> -- 
> Manuel Bouyer, LIP6, Universite Paris VI.           
> Manuel.Bouyer%lip6.fr@localhost
>      NetBSD: 26 ans d'experience feront toujours la difference
> --

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