Re: [PATCH net v5 1/2] bonding: convert unbalanced_load to per-cpu state

[Nikolay Aleksandrov]

On 25/08/2026 04:01, Hangbin Liu wrote:
> From: Hangbin Liu <liuhangbin@xxxxxxxxxx>
>
> A later patch widens the bonding TLB tx counters from u32 to u64. The
> unbalanced_load counter sits in the transmit hot path, and cross-CPU
> synchronization of a u64 would introduce measurable overhead. Convert
> unbalanced_load to a per-cpu counter first so that the subsequent
> widening only touches per-cpu data local to each CPU.
>
> Introduce struct unbalanced_load_stats to hold the per-cpu counter,
> and move the aggregation into a helper, reset_unbalanced_load(), which
> sums all per-cpu instances. Use the delta of current total load vs
> variable prev_total_unbalanced to calculate the loading.
>
> Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxxx>
> ---
>   drivers/net/bonding/bond_alb.c | 37 ++++++++++++++++++++++++++++++-------
>   include/net/bond_alb.h         |  7 ++++++-
>   2 files changed, 36 insertions(+), 8 deletions(-)

Reviewed-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>