ice: use netif_get_num_default_rss_queues()

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On some high-core systems (like AMD EPYC Bergamo, Intel Clearwater
Forest) loading ice driver with default values can lead to queue/irq
exhaustion. It will result in no additional resources for SR-IOV.

In most cases there is no performance reason for more than half
num_cpus(). Limit the default value to it using generic
netif_get_num_default_rss_queues().

Still, using ethtool the number of queues can be changed up to
num_online_cpus(). It can be done by calling:
$ethtool -L ethX combined $(nproc)

This change affects only the default queue amount.

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

...

This commit is contained in:

Michal Swiatkowski 2025-10-30 09:30:53 +01:00 • committed by Tony Nguyen

parent 483dd5f36f

commit ee13aa1a2c

2 changed files with 11 additions and 6 deletions

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5

drivers/net/ethernet/intel/ice/ice_irq.c

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12

drivers/net/ethernet/intel/ice/ice_lib.c

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