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Re: [Xen-users] PV Linux domUs freeze after a few hours

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Subject: Re: [Xen-users] PV Linux domUs freeze after a few hours
From: Leszek Urbanski <tygrys@xxxxxx>
Date: Wed, 2 Sep 2009 21:21:33 +0200
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<7207d96f0909021002j1e99901aw5b253a7bc2df7eef@xxxxxxxxxxxxxx>; from Fajar A. 
Nugraha on Thu, Sep 03, 2009 at 00:02:12 +0700

> > - domU kernels: paravirt ops 2.6.30 and Lenny's xenified 2.6.26 (both have
> >  the same problems)
> I had CPU softlockup problem with Lenny's xen kernel. Using 2.6.29
> xenified kernel seems to fix that.

What bothers me is that the lockups occur with both pv_ops and xenified
kernels. That's supposed to be different code. The bug may as well be in
the hypervisor or dom0 kernel (less likely).

> > - downgrading domU kernel to xenified 2.6.18
> That one seems to be most promising. Assuming your domU can use
> 2.6.18. I mostly use RHEL's kernel-xen (2.6.18) which comes with the
> distro and works fine.

That's actually a last resort. We can't stick to 2.6.18 in dom0 nor domU
forever due to outdated iSCSI support etc. It'd be easier for us to switch
to KVM.

Leszek "Tygrys" Urbanski, SCSA, SCNA
 "Unix-to-Unix Copy Program;" said PDP-1. "You will never find a more
  wretched hive of bugs and flamers. We must be cautious." -- DECWARS
     http://cygnus.moo.pl/ -- Cygnus High Altitude Balloon

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