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[Xen-devel] Re: Memory fragmentation, order>0 allocation, and 4.0 dynamic RAM optimization features

To: "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx>
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Tue, 09 Feb 2010 13:13:09 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Tim Deegan <Tim.Deegan@xxxxxxxxxx>, GeorgeDunlap <george.dunlap@xxxxxxxxxxxxx>, PatrickColp <pjcolp@xxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, Andrew Peace <Andrew.Peace@xxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Grzegorz Milos <gm281@xxxxxxxxx>
Delivery-date: Tue, 09 Feb 2010 05:13:31 -0800
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

>>> Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> 08.02.10 19:13 >>>
>Are there other known order>0 allocations that might result
>in similar issues?

The passthrough code has data structures which dynamically (nr_irqs-
based) can exceed a page (see pt_irq_create_bind_vtd()).

Jan


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References:
- [Xen-devel] Memory fragmentation, order>0 allocation, and 4.0 dynamic RAM optimization features
  - From: Dan Magenheimer

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