Posts made by cfischer

Which XoaPlan is needed to get Netdata support? It isn't listet in the feature matrix.

Is the netdata plugin open source? I couldn't find it at github.

@olivierlambert: Thanks, I wasn't aware the possibility submitting tickets. Ticket created.

@olivierlambert: How can I open a support ticket without buying support?

@olivierlambert: The problem is that there are not enough grants for creating queues for 9 vif on a system running 4 vcpu. Trying to create the 4th queue for vif-7 raises a max_grant_frames reached error. The netfront driver could create only 3 of 4 queues for vif-7 and 0 queues for vif-8, which is configured in Xen but therefore not present in the guest.

That is not a problem of the "Other media install" template, all created VMs (different templates, different OSs) have the same issue, max_nr_frames=32, which seems a default value for XCP-ng. Since Xen version 4.10 max_grant_frames isn't a global config parameter issued to the hypervisor at boot time anymore. Since version 4.10 it is a parameter per domU.

The question is, since XCP-ng has no config files per domU, how can I set domU parameter?

@olivierlambert: I've read since 4.10 it is a domU configuration via max_grant_frames parameter. Since XCP-ng has no config files per domU, how can I set domU parameter?

I've tried it via

xe vm-param-set platform:max_grant_frames=64 uuid=b61297e6-a413-135a-fa1e-647b547247ef

but no success.

@olivierlambert: Are you asking for issues with the VM? Yes, the issue is that I get round about 7.5 of 9 vif if I have 4 vcpu due to the lack of grants.

I've freshly installed and updated OL7 and Debian9 using the provided templates.

13:19 xs1 ~]# xl list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  1840     4     r-----    4892.2
ER1-de.egr.lan                               1   512     4     -b----      86.5
Debian Stretch 9.0 (1)                       7   511     4     -b----      14.5
Oracle Linux 7 (1)                           9  4095     4     -b----      71.2
[13:19 xs1 ~]# xen-diag gnttab_query_size 0
domid=0: nr_frames=1, max_nr_frames=64
[13:19 xs1 ~]# xen-diag gnttab_query_size 1
domid=1: nr_frames=32, max_nr_frames=32
[13:19 xs1 ~]# xen-diag gnttab_query_size 7
domid=7: nr_frames=5, max_nr_frames=32
[13:19 xs1 ~]# xen-diag gnttab_query_size 9
domid=9: nr_frames=5, max_nr_frames=32

Grants for domU are always 32. What is causing the grants limit?

@olivierlambert: I can't find a restriction of this kind in the template.

Yes, Other media

Hello,

got the following while started a VyOS router:

[    2.072983] xen:grant_table: xen/grant-table: max_grant_frames reached cur=32 extra=1 limit=32 gnttab_free_count=191 req_entries=65
[    2.072985] xen_netfront: can't alloc rx grant refs
[    2.092487] vif vif-7: only created 3 queues

Do you know who is limiting domU to 32 pages while dom0 has 64 per default?

11:14 xs1 ~]# xen-diag gnttab_query_size 0
domid=0: nr_frames=1, max_nr_frames=64
[11:14 xs1 ~]# xen-diag gnttab_query_size 1
domid=1: nr_frames=32, max_nr_frames=32

Thanks
Christian