From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Davies <richard@arachsys.com>
Subject: Re: Windows slow boot: contractor wanted
Date: Wed, 22 Aug 2012 16:34:59 +0100
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Cc: Avi Kivity <avi@redhat.com>, qemu-devel@nongnu.org,
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To: Rik van Riel <riel@redhat.com>
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Rik van Riel wrote:
> Richard Davies wrote:
> > I've now triggered a very slow boot at 3x 36GB 8-core VMs on a 128GB
> > host (i.e. 108GB on a 128GB host).
> >
> > It has the same profile with _raw_spin_lock_irqsave and
> > isolate_freepages_block at the top.
>
> That's the page compaction code.
>
> Mel Gorman and I have been working to fix that, the latest fixes and
> improvements are in the -mm kernel already.

Hi Rik,

That's good news.

Can you point me to specific patches which we can backport to a 3.5.2 kernel
to test whether they fix our problem?

Thanks,

Richard.