Re: [BUG] mellanox IB driver fails to load on large config

[Matan Barak <matanb@mellanox.com>]

On 7/14/2015 11:28 PM, Alex Thorlton wrote:
> On Tue, Jul 14, 2015 at 11:06:26PM +0300, Or Gerlitz wrote:
>> On Tue, Jul 14, 2015 at 9:48 PM, Alex Thorlton <athorlton@sgi.com> wrote:
>>> On Tue, Jul 14, 2015 at 01:22:34PM -0500, andrew banman wrote:
>>>> On Sat, Jul 11, 2015 at 11:20:19PM +0300, Or Gerlitz wrote:
>>>>> On Fri, Jul 10, 2015 at 10:15 PM, andrew banman <abanman@sgi.com> wrote:
>>>>>> I'm seeing a large number of allocation errors originating from the Mellanox IB
>>>>>> driver when booting the 4.2-rc1 kernel on a 4096cpu 32TB memory system:
>>>>>
>>>>> Just to make sure, mlx4 works fine on this small (...) system with 4.1
>>>>> and 4.2-rc1 breaks, or 4.2-rc1 is the 1st time you're trying that
>>>>> config?
>>>>
>>>> I'll let Alex comment on that, he did some testing on that.
>>>
>>> I started seeing this on a 4.1-rc8 kernel, so it's been around for a
>>> little while.  It may have been around before 4.1-rc8, but I haven't run
>>> any kernels older than that on the big machine for some time.
>>
>> To make sure I am correctly following, on 4.1-rc8  you also see
>> something, right?
>
> Yes, that's correct.
>
>> are these the same messages or different ones? if the latter send to us.
>
> We see the same exact messages on 4.1-rc8.

Hi,

We don't recall getting those error with 32cpu machines, but we'll try 
to reproduce this issue.

Matan

>
> Thanks for looking into this!
>
> - Alex
>