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[Xen-devel] Maximum number of ring slots a packet can take up in netfront/netback?

  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
  • Date: Fri, 25 Apr 2008 22:17:00 +1000
  • Delivery-date: Fri, 25 Apr 2008 05:17:30 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcimzkMcxrjjWd5PRuOi+LAZoX9DAg==
  • Thread-topic: Maximum number of ring slots a packet can take up in netfront/netback?
Looking through the code for netback.c, I believe that the maximum
number of ring slots a network packet can take up is MAX_SKB_FRAGS = 18?

Is this the case? That would explain why I've been having so much
trouble with the windows PV drivers - they routinely put over 20 slots
on the ring.

James

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