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[Minios-devel] high number of shared pages

  • To: "minios-devel@xxxxxxxxxxxxxxxxxxxx" <minios-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: maximilien roux <max_oux@xxxxxxxxxxx>
  • Date: Tue, 12 Sep 2017 08:18:46 +0000
  • Accept-language: fr-FR, en-US
  • Delivery-date: Tue, 12 Sep 2017 08:33:34 +0000
  • List-id: Mini-os development list <minios-devel.lists.xenproject.org>
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  • Thread-topic: high number of shared pages


I am trying to share memory between two minios-based domains. When I try to share more than 495 pages, the mapping of the 495th pages always fail. When the hypercall HYPERVISOR_grant_table_op is returning in the _gntmap_map_grant_refs (gntmap.c) function, the status in the structure gnttab_unmap_grant_ref is set to an undefined general error.

I tried to increase the value of gnttab_max_frames and gnttab_max_maptrack_frames in Xen at boot time by the grub file but it did not work. I used Xen 4.6 to 4.8 with the same results.

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