bonding: convert unbalanced_load to per-cpu state

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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.

Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Hangbin Liu <liuhangbin@kylinos.cn>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20260831-bond_overflow-v6-1-ffb0ed1f7268@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Hangbin Liu 2026-08-31 09:50:59 +08:00 • committed by Jakub Kicinski

parent d0ec95a8a4

commit e147615635

2 changed files with 36 additions and 8 deletions

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37

drivers/net/bonding/bond_alb.c

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7

include/net/bond_alb.h

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