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Re: [Xen-devel] checkLiveMigrateMemory() insufficient?

To: John Levon <levon@xxxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] checkLiveMigrateMemory() insufficient?
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 01 Oct 2008 17:22:57 +0100
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
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On 1/10/08 17:17, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

> So we have 12Mb free from physinfo, and we're trying to allocate 6Mb plus some
> other smaller allocations. I suspect the issue is one of fragmentation of the
> heap? That is, no allocations of order SHADOW_MAX_ORDER could be found?
> 
> Does the linux balloon handler free in page-sized increments like Solaris
> currently does?
> 
> Is there a better way to handle this?

It'd be nice if the shadow code didn't need order >0 allocations. I don't
know if that is likely to change, or how easy it would be, however.

 -- Keir



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