Re: [Xen-users] xen gnttab problem

[Tomas Mozes <hydrapolic@xxxxxxxxx>]

Hello,

if it's Xen version 4.10, then you need to set it in the domU configuration via max_grant_frames parameter. In older Xen it's a kernel parameter set globally.

Tomas

On Sat, Jun 30, 2018 at 12:14 PM, Christoph <mangel@xxxxxx> wrote:

Hi

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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Greetz

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