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Re: [Xen-devel] alloc_heap_pages rejecting several order=6 requests early in boot (not tmem)


  • To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Fri, 20 Mar 2009 17:18:25 +0000
  • Cc:
  • Delivery-date: Fri, 20 Mar 2009 10:19:03 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acmpeftwzl+a3ytgSzKTYfSN/43K9AABeUcK
  • Thread-topic: [Xen-devel] alloc_heap_pages rejecting several order=6 requests early in boot (not tmem)

On 20/03/2009 16:34, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> I'm just reporting this because the allocation failures
> are otherwise silent, and might be indicative of some
> bug (one would think that allocating a 256K chunk
> of memory during dom0 boot would always succeed...)
> or something that might reduce functionality or performance
> in dom0.

These will be swiotlb trying to get the lowest memory it possibly can. It
basically makes allocation calls with increasing acceptable address width
until the request succeeds. So these are harmless I believe.

 Thanks,
 Keir



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