Re: PATCH vmx.c: add printk_ratelimit in vmx_intr_assist

[Ryan Harper <ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

* Ryan Harper <ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org> [2007-12-14 16:14]:
> * Ryan Harper <ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org> [2007-12-14 09:36]:
> > * Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org> [2007-12-14 08:49]:
> > > Ryan Harper wrote:
> > > >Add printk_ratelimit check in front of printk.  This prevents spamming
> > > >of the message during 32-bit ubuntu 6.06server install.  Previously, it
> > > >would hang during the partition formatting stage.
> > > >  
> > > 
> > > Applied, but this is worrying.  Do you know whether this is a regression?
> > 
> > I'll try out older releases to see if we did regress.
> 
> Looks like kvm-47 introduced the hang during format, -46 finishes the
> format just fine and with no printk spamming.  I'll start seeing
> if I can bisect down to a particular changeset.

My git skills are poor and I can't for the life of my figure out how to
get kvm and kvm-userspace checked out at kvm-46 and build them together.
So, instead I tested the nightly tarballs between Oct 10 (kvm-46
release) and Oct 18 (kvm-47).

kvm-snapshot-20071014.tar.gz is the last known good version.
version:        kvm-snapshot-20071014
srcversion:     5F6E5524AD0A76F65C4CF60

The flooding of: [2592349.069880] Fault when IDT_Vectoring starts with
1015 but 1015 can complete the formatting.  16 and 17 won't compile.  18
of course fails completely.

So, something between 14 and 15 added the flooding, and something
between 15 and 18 prevents formatting from progressing.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org

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