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SubjectRe: [BUG] mellanox IB driver fails to load on large config
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On Tue, Jul 21, 2015 at 5:56 AM, Alex Thorlton <athorlton@sgi.com> wrote:
> On Mon, Jul 20, 2015 at 11:28:03AM -0500, Alex Thorlton wrote:
>> I've got some time on the large machine later today. I'll give this a
>> try then.
>
> I ran a boot with this patch applied:
>
> diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
> index 83e80ab..c84aea0 100644
> --- a/include/linux/mlx4/device.h
> +++ b/include/linux/mlx4/device.h
> @@ -45,7 +45,7 @@
> #include <linux/timecounter.h>
>
> #define MAX_MSIX_P_PORT 17
> -#define MAX_MSIX 64
> +#define MAX_MSIX 8192
> #define MSIX_LEGACY_SZ 4
> #define MIN_MSIX_P_PORT 5
>
> I went for a max of 8192, since I was actually booting the machine with
> 6144 cores (not 4096) for this run. It doesn't look like this fixed the
> problem. I still saw the same errors during boot.
>
> FWIW, the module does appear to still successfully load:
>
> 8<---
> # lsmod | grep mlx
> mlx4_ib 151552 0
> ib_sa 32768 1 mlx4_ib
> ib_mad 49152 2 ib_sa,mlx4_ib
> ib_core 102400 3 ib_sa,mlx4_ib,ib_mad
> mlx4_core 278528 1 mlx4_ib
> --->8
>
> If the module loading is good enough, and we should just ignore the
> errors, then I'm fine with that. Just wanting to make sure that
> everything is behaving correctly.

It shouldn't be a problem, as all unused/erroneous EQs get "-1".
We'll try to reproduce the problem here, it might take awhile though.

Thanks for checking this,
Matan

>
> - Alex
> --
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