Re: [dpdk-dev] [PATCH v4 0/3] Fix incorrect max TX queue numbers for ixgbe

[Bruce Richardson <bruce.richardson@intel.com>]

On Thu, Mar 24, 2016 at 03:22:01PM +0000, Pablo de Lara wrote:
> IXGBE supports 128 TX queues. However, the full 128 queues
> are only available in VT and DCB mode.
> In normal default "none" mode (VT/DCB off) the maximum number
> of available queues is only 64.
> IXGBE doesn't check the mode when reporting the available
> number of queues. If a queue larger than 64 is used in default mode,
> the TX packets will be dropped silently.
> 
> This patchset:
> 
> - Modifies the device info to show the correct maximum number of available TX queues,
>   depending on the mode.
> 
> - Adds a check to forbid using a queue number larger than 64
>   during device configuration (in default mode), so that the problem is
>   reported as early as possible.
> 
> - It also changes the order of where the dev_conf parameters are copied
>   into the dev structure so that the correct maximum number of queues
>   is reported for the correct mode.
> 
> Changes in v4:
> - Split the patch in three smaller patches
> - Updated release notes document
> 
> Changes in v3:
> - Fixed wrong set of TX queues for 82596EB
> 
> Changes in v2:
> 
> - Reorder memcpy of device configuration in rte_eth_dev_configure(),
>   so function gets the correct maximum number of queues
>   (depending on the operation mode), before checking the
>   requested number of queues.
> - Renamed new macro
> - Reworded/wrapped commit message
> 
> Pablo de Lara (1):
>   ethdev: copy device configuration earlier
> 
> Wenzhuo Lu (2):
>   ixgbe: fix incorrect tx queue number assignment
>   ixgbe: fix incorrect max tx queue number
> 
All three patches are fixes, so all three should have "Fixes" lines in them.
Please remember for next time!

Thanks,
/Bruce