linux-kernel - Re: regression - 2.6.36 -> 2.6.37 - kvm

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Message-ID: <20110224112742.GB29840@pcnci.linuxbox.cz>
Date:	Thu, 24 Feb 2011 12:27:42 +0100
From:	Nikola Ciprich <extmaillist@...uxbox.cz>
To:	Avi Kivity <avi@...hat.com>
Cc:	KVM list <kvm@...r.kernel.org>,
	Linux kernel list <linux-kernel@...r.kernel.org>,
	nikola.ciprich@...uxbox.cz
Subject: Re: regression - 2.6.36 -> 2.6.37 - kvm - 32bit SMP guests don't
	boot

> Not very useful when the guest is making progress, I'm afraid.
can perf report help here?

> Can you try a little trace-cmd -e kvm -b 20000?
ugh, I'm afraid I'll have some dumb questions here :-[
You mean this: git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git ?
and then re-execute qemu-kvm using it? or I'm totally wrong?

> Sure.  Something similar that came up - sometimes Windows IDE drivers  
> fall back to PIO mode.  Are you using IDE?  If so, please check whether  
> it's using DMA or PIO.
I'll check, but this problem occurs only during fsck phase, when to guest boots, then it runs pretty fast..
so maybe during boot it might fall back to PIO, but from guest, I guess I won't have a chance
to find out.. can I somehow check it from host?
>
> -- 
> error compiling committee.c: too many arguments to function
>
> --
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