Re: [Xen-devel] WARNING: at drivers/xen/gntdev.c:426 unmap_if_in_range+0x5d/0x60 [xen_gntdev]()

["Christopher S. Aker" <caker@xxxxxxxxxxxx>]

On Dec 15, 2014, at 6:11 AM, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:
> On 11/12/14 15:12, Christopher S. Aker wrote:
>> Xen: 4.4.2-pre (28573:f6f6236af933) + xsa111, xsa112, xsa114
>> Dom0: 3.17.4
>> 
>> Things go badly after a day or four.  We've hit this on a number of 
>> previously healthy hosts, since moving from 3.10.x dom0 to 3.17.4:
>> 
>> printk: 5441 messages suppressed.
>> grant_table.c:567:d0 Failed to obtain maptrack handle.
>> grant_table.c:567:d0 Failed to obtain maptrack handle.
>> grant_table.c:567:d0 Failed to obtain maptrack handle.
>> grant_table.c:567:d0 Failed to obtain maptrack handle.
> 
> Can you provide more details about your networking and storage setup.
> In particular, do you have a domU providing networked storage (iscsi for
> example) to other domains on the same host?

Certainly. Thanks for the response. We're not using iscsi, but we do have some 
serious kit going on. This is the setup:

Storage: BBU hardware RAID (LSI), SSD drives, LVM logical volumes exported to 
the guests via blkback.

Network: Four 10Gbit links, ixgbe, bonded, then bridged onto br0, exported via 
netback via vifs.

Nothing fancier than that :)

-Chris


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