net_sched: sfq: allow divisor to be a parameter

SFQ currently uses a 1024 slots hash table, and its internal structure
(sfq_sched_data) allocation needs order-1 page on x86_64

Allow tc command to specify a divisor value (hash table size), between 1
and 65536.
If no value is provided, assume the 1024 default size.

This allows admins to setup smaller (or bigger) SFQ for specific needs.

This also brings back sfq_sched_data allocations to order-0 ones, saving
3KB per SFQ qdisc.

Jesper uses ~55.000 SFQ in one machine, this patch should free 165 MB of
memory.

Signed-off-by: Eric Dumazet <[email protected]>
CC: Patrick McHardy <[email protected]>
CC: Jesper Dangaard Brouer <[email protected]>
CC: Jarek Poplawski <[email protected]>
CC: Jamal Hadi Salim <[email protected]>
CC: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

0 files changed, 0 insertions, 0 deletions