Re: NFSoRDMA developers bi-weekly meeting announcement (4/30)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 04/30/2014 01:00 PM, Or Gerlitz wrote:
On Wed, Apr 30, 2014 at 10:47 PM, Chuck Lever <chuck.lever@xxxxxxxxxx>

If I understood Yan, he is trying to use NFS/RDMA in guests (kvm?).  We
are pretty sure that is not working at the moment,
can you provide a short 1-2 liner why/what is broken there? the only
thing which I can think of to be not-supported over mlx4 VFs is the
proprietary FMRs, but AFAIK, the nfs-rdma code doesn't even have a
mode which uses them, right?
I've created Xen guest on DomU. Dom0 PF works which has no mtts been enabled, however DomU I hit this problem by just mounting the file system:
mlx4_core 0000:00:04.0: Failed to allocate mtts for 66 pages(order 7)
mlx4_core 0000:00:04.0: Failed to allocate mtts for 4096 pages(order 12)
mlx4_core 0000:00:04.0: Failed to allocate mtts for 4096 pages(order 12)

RDMA microbenchmark perftest works ok. I enabled mtts scripts when booting the Xen guest. cat /proc/mtrr:

[root@ca-nfsdev1vm1 log]# cat /proc/mtrr
reg00: base=0x0f0000000 ( 3840MB), size=  128MB, count=1: uncachable
reg01: base=0x0f8000000 ( 3968MB), size=   64MB, count=1: uncachable

lspci -v
00:04.0 InfiniBand: Mellanox Technologies MT25400 Family [ConnectX-2 Virtual Function] (rev b0)
    Subsystem: Mellanox Technologies Device 61b0
    Physical Slot: 4
    Flags: bus master, fast devsel, latency 0
    Memory at f0000000 (64-bit, prefetchable) [size=128M]
    Capabilities: [60] Express Endpoint, MSI 00
    Capabilities: [9c] MSI-X: Enable+ Count=4 Masked-
    Kernel driver in use: mlx4_core
    Kernel modules: mlx4_core

I will need to find another machine to try KVM guest. Yan might hit a different problem.

I have ConnectX-2, FW level is 2.11.2012. Yan has ConnectX-3, he tried it on KVM guest.
but that is a priority
to get fixed. Shirley has a lab set up and has been looking into it.
Shirley
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Filesystem Development]     [Linux USB Development]     [Linux Media Development]     [Video for Linux]     [Linux NILFS]     [Linux Audio Users]     [Yosemite Info]     [Linux SCSI]

  Powered by Linux