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From: Roland Dreier <rdreier@cisco.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm-devel <kvm@vger.kernel.org>
Subject: Re: Fresh install of Windows XP hangs early in boot?
Date: Tue, 29 Jul 2008 15:00:06 -0700	[thread overview]
Message-ID: <adaej5c2vx5.fsf@cisco.com> (raw)
In-Reply-To: <20080729212332.GA8331@dmt.cnet> (Marcelo Tosatti's message of "Tue, 29 Jul 2008 18:23:32 -0300")

 > Known problem:
 > http://www.nabble.com/LSI:-avoid-infinite-loops-p17116605.html

 > Windows driver has scripts code which busy loops on main memory. Since
 > that executes in vcpu context, the cpu won't ever get a chance to change
 > the variable which the SCSI emulation is looping at.

Thanks Marcelo (and Alberto) for pointing me at this.

 > The proposed hack, however, is half-assed (see Paul Brook's comments on
 > that thread).

I'd be willing to take a stab at a better fix.  Is there any
documentation about the lsi microcode engine anywhere?  Would the right
fix to be to detect the busy loop on CPU memory and return from
lsi_execute_script() in that case?

BTW I tried using if=ide to install Windows XP and got a blue screen
during the installer.  What are people doing to run XP in a kvm guest?

 - R.

  reply	other threads:[~2008-07-29 22:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <aday73k34zw.fsf@cisco.com>
2008-07-29 19:08 ` Fresh install of Windows XP hangs early in boot? Roland Dreier
2008-07-29 19:39   ` Roland Dreier
2008-07-29 21:02     ` Alberto Treviño
2008-07-29 21:23     ` Marcelo Tosatti
2008-07-29 22:00       ` Roland Dreier [this message]
2008-07-29 22:57         ` Marcelo Tosatti
2008-07-30  1:14           ` Marcelo Tosatti
2008-07-30  5:25             ` Roland Dreier
2008-07-30  3:27           ` Roland Dreier
2008-07-30  4:32         ` Alberto Treviño
2008-07-30  7:14         ` Chris Lalancette
2008-07-30 14:55           ` Roland Dreier
2008-07-30 15:13             ` Avi Kivity
2008-07-30  5:27       ` Roland Dreier
2008-07-31 19:34         ` Marcelo Tosatti

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