linux-stable/include
Jakub Kicinski 416ef9b15c net: sched: red: don't reset the backlog on every stat dump
Commit 0dfb33a0d7 ("sch_red: report backlog information") copied
child's backlog into RED's backlog.  Back then RED did not maintain
its own backlog counts.  This has changed after commit 2ccccf5fb4
("net_sched: update hierarchical backlog too") and commit d7f4f332f0
("sch_red: update backlog as well").  Copying is no longer necessary.

Tested:

$ tc -s qdisc show dev veth0
qdisc red 1: root refcnt 2 limit 400000b min 30000b max 30000b ecn
 Sent 20942 bytes 221 pkt (dropped 0, overlimits 0 requeues 0)
 backlog 1260b 14p requeues 14
  marked 0 early 0 pdrop 0 other 0
qdisc tbf 2: parent 1: rate 1Kbit burst 15000b lat 3585.0s
 Sent 20942 bytes 221 pkt (dropped 0, overlimits 138 requeues 0)
 backlog 1260b 14p requeues 14

Recently RED offload was added.  We need to make sure drivers don't
depend on resetting the stats.  This means backlog should be treated
like any other statistic:

  total_stat = new_hw_stat - prev_hw_stat;

Adjust mlxsw.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Nogah Frankel <nogahf@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-17 14:29:32 -05:00
..
acpi Merge branch 'acpi-ec' into acpi 2017-11-30 13:37:29 +01:00
asm-generic error-injection: Add injectable error types 2018-01-12 17:33:38 -08:00
clocksource
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-01-05 12:10:06 -08:00
drm drm: rework delayed connector cleanup in connector_iter 2017-12-13 22:59:00 +01:00
dt-bindings
keys
kvm KVM: arm/arm64: timer: Don't set irq as forwarded if no usable GIC 2017-12-18 10:53:23 +01:00
linux net/mlx5: Fix build break 2018-01-17 11:24:28 -05:00
math-emu
media
memory
misc
net net: sched: red: don't reset the backlog on every stat dump 2018-01-17 14:29:32 -05:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace net: tracepoint: exposing sk_faimily in tracepoint inet_sock_set_state 2018-01-08 14:32:45 -05:00
uapi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-17 00:10:42 -05:00
video
xen xen: fixes for 4.15-rc5 2017-12-22 12:30:10 -08:00