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Date: Mon, 09 Jun 2014 14:32:31 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v4 20/29] hostmem: allow preallocation of
 any memory region
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To: Igor Mammedov <imammedo@redhat.com>, Hu Tao <hutao@cn.fujitsu.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>, qemu-devel@nongnu.org, Eduardo Habkost <ehabkost@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>

Il 09/06/2014 14:28, Igor Mammedov ha scritto:
> On Mon, 9 Jun 2014 18:25:25 +0800
> Hu Tao <hutao@cn.fujitsu.com> wrote:
>
>> From: Paolo Bonzini <pbonzini@redhat.com>
>>
>> And allow preallocation of file-based memory even without -mem-prealloc.
>> Some care is necessary because -mem-prealloc does not allow disabling
>> preallocation for hostmem-file.
> maybe 'prealloc' property should belong to hostmem-file instead of the
> abstract hostmem.

No, prealloc makes sense even in hostmem-ram (especially in combination 
with "-realtime mlock").

Paolo