Re: [PATCH] igb: Update to 5.3.2.2

[Matthias Fischer <matthias.fischer@ipfire.org>]

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Hi,

On 16.08.2015 07:54, Arne Fitzenreiter wrote:
> Is the MultiQueue mode working with this version?

Being rather naive, I just saw that this version was relatively old, had 
some "computing time" left on my devel, so I thought: "Why not...?" ;-)

> Currently we not use the igb lfs because the older Version from
> backports works with MultiQueue.

I didn't know that and actually can't test this driver on my system. I 
just thought it could be updated.

An excerpt from README - perhaps always the same - leads me to the 
assumption that Multiqueue mode perhaps can be enabled (?):

***SNIP***
Multiqueue
----------

In this mode, a separate MSI-X vector is allocated for each queue and 
one for "other" interrupts such as link status change and errors. All 
interrupts are throttled via interrupt moderation. Interrupt moderation 
must be used to avoid interrupt storms while the driver is processing 
one interrupt. The moderation value should be at least as large as the 
expected time for the driver to process an interrupt. Multiqueue is off 
by default.

REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not 
found, the system will fallback to MSI or to Legacy interrupts. This 
driver supports multiqueue in kernel versions 2.6.24 and newer. This 
driver supports receive multiqueue on all kernels that support MSI-X.

NOTES:

- Do not use MSI-X with the 2.6.19 or 2.6.20 kernels.
- On some kernels a reboot is required to switch between single queue 
mode and multiqueue mode or vice-versa.
***SNAP***

Regards
Matthias