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Re: [Xen-devel] 3.0.4 (and earlier): skbuff_ctor() use of xen_create_contiguous_region()

  • To: Jan Beulich <jbeulich@xxxxxxxxxx>, David Edmondson <dme@xxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Fri, 09 Mar 2007 14:08:45 +0000
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 09 Mar 2007 06:08:02 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcdiVHMHsYDWVM5HEduPNwAX8io7RQ==
  • Thread-topic: [Xen-devel] 3.0.4 (and earlier): skbuff_ctor() use of xen_create_contiguous_region()

On 9/3/07 12:45, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> I understand that, but what I wanted clarification on is whether this is
> only for performance, not for correctness (and performance would still
> suffer if the allocation turns out to be beyond the physical reach of the
> particular NIC).

Yes, and yes (specifically primarily the jumbo-frame receive case, as
described in my previous email). Thus you may want to consider keeping the
patch in your own kernel.

 -- Keir

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