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Re: [Xen-devel] pvgrub boot problems

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] pvgrub boot problems
From: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
Date: Wed, 7 Apr 2010 01:19:37 +0200
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, M A Young <m.a.young@xxxxxxxxxxxx>
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References: <C7D39A1F.E823%keir.fraser@xxxxxxxxxxxxx> <20100327112400.GW1878@xxxxxxxxxxx> <alpine.LFD.2.00.1003271919490.5501@xxxxxxxxxxxxxxx> <4BAE856E.5090902@xxxxxxxx> <20100404172109.GN3973@xxxxxxxxxxxxxxxxxxxxxxxxx> <alpine.LFD.2.00.1004051900350.338@xxxxxxxxxxxxxxx> <20100405234034.GL23034@xxxxxxxxxxxxxxxxxxxxxxxxx> <alpine.GSO.2.00.1004061051100.11480@xxxxxxxxxxxxxxxx> <20100406212509.GT4015@xxxxxxxxxxxxxxxxxxxxxxxxx> <4BBBB357.5050905@xxxxxxxx>
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Jeremy Fitzhardinge, le Tue 06 Apr 2010 15:19:03 -0700, a écrit :
> I applied both, but something is still amiss.  Just commenting out the 
> two frees allowed the domain to start, but the kernel started printing 
> messages about the page state of various processes being bad.
> After applying your two most recent patches (reverting the commented-out 
> free_pages first), the domain seems to boot, but then hangs at some 
> point early.
> Disabling vfb still works fine.

Ok. The ground reason of all that is this:

shutdown_kbdfront: error changing state device/vkbd/0/state to 5: ENOENT

The MiniOS kbdfront driver can not stop the backend because xenstore
doesn't let it set the state to closing. I fail to understand how the
ENOENT error could happen (but not for the fb part!), and don't really
have the time to investigate further inside the meandres of xenstore...


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