From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: [PATCH 2 of 4] x86: make the pv-only e820 array be
	dynamic
Date: Tue, 12 Apr 2011 14:06:05 +0100
Message-ID: <C9CA0CCD.2C923%keir@xen.org>
References: <20110412125317.GA19198@dumpdata.com>
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To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xensource.com, Ian Jackson <Ian.Jackson@eu.citrix.com>, Ian.Campbell@citrix.com, Tim.Deegan@citrix.com
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On 12/04/2011 13:53, "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com> wrote:

>> How cunning.
>> 
>> Why wouldn't you just allocate exactly the right size of array in
>> XENMEM_set_memory_map?
> 
> I was thinking about it, but the mm.c code did not have the
> xen/xmalloc.h header, nor any references to xmalloc_array.
> 
> Is it OK to make an xmalloc_array during a hypercall?

Yes. I think the toolstack should be able to clean up on the newly-possible
ENOMEM return from this hypercall.

 -- Keir