[ofa-general] [PATCH] mlx4_core: add module parameter to enable/disable QoS support. (for 2.6.27)
hal.rosenstock at gmail.com
Sun Jul 27 04:40:00 PDT 2008
On Sun, Jul 27, 2008 at 3:50 AM, Jack Morgenstein
<jackm at dev.mellanox.co.il> wrote:
> On Monday 21 July 2008 19:46, Hal Rosenstock wrote:
>> Out of curiousity, why is a module parameter needed to enable/disable
>> QoS ? Is there a downside to enabling it in terms of the HCA ?
>> -- Hal
> We noticed (after ofed 1.3 was released) that setting the QoS bit in the HCA
> resulted in using more HW resources.
Would you elaborate on which ones ? Thanks.
> Since Qos is usually not used we decided to disable the feature by default,
> and allow enabling it when it is needed.
> In ofed 1.3.1 the default value was therefore changed to be OFF.
> - Jack
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