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[Xen-users] xen gnttab problem

  • To: xen-users@xxxxxxxxxxxxxxxxxxxx
  • From: Christoph <mangel@xxxxxx>
  • Date: Sat, 30 Jun 2018 12:14:22 +0200
  • Delivery-date: Sat, 30 Jun 2018 10:15:17 +0000
  • List-id: Xen user discussion <xen-users.lists.xenproject.org>


I can set the gnttab frames with gnttab_max_frames=256 as hypervisor boot parameter.
It seems to be working for the dom0:

xen-diag gnttab_query_size 0
domid=0: nr_frames=1, max_nr_frames=256

but not for domU's:

xen-diag gnttab_query_size 2
domid=2: nr_frames=32, max_nr_frames=32

This causes problems in domU with lot of IO (example 5 virtual hd's as NFS or/and SMB server). They hang if it want to use >32 frames.

it is possible that you set the value=32 for domU's in xen/kernel config?


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