linux-toradex.git/Documentation/networking/bonding.txt, branch v4.1.16

tcp: allow for bigger reordering level

2014-10-29T19:05:15+00:00

While testing upcoming Yaogong patch (converting out of order queue
into an RB tree), I hit the max reordering level of linux TCP stack.

Reordering level was limited to 127 for no good reason, and some
network setups [1] can easily reach this limit and get limited
throughput.

Allow a new max limit of 300, and add a sysctl to allow admins to even
allow bigger (or lower) values if needed.

[1] Aggregation of links, per packet load balancing, fabrics not doing
 deep packet inspections, alternative TCP congestion modules...

Signed-off-by: Eric Dumazet 
Cc: Yaogong Wang 
Signed-off-by: David S. Miller

bonding: update bonding.txt for Layer2 hash factors

2014-07-17T23:03:27+00:00

Document the Layer 2 hash factors with packet type ID field.

CC: Jay Vosburgh 
CC: Veaceslav Falico 
CC: Andy Gospodarek 
CC: David S. Miller 
CC: Pan Jiafei 

Signed-off-by: Jianhua Xie 
Signed-off-by: David S. Miller

bonding: Add tlb_dynamic_lb parameter for tlb mode

2014-04-24T17:04:34+00:00

The aggresive load balancing causes packet re-ordering as active
flows are moved from a slave to another within the group. Sometime
this aggresive lb is not necessary if the preference is for less
re-ordering. This parameter if used with value "0" disables
this dynamic flow shuffling minimizing packet re-ordering. Of course
the side effect is that it has to live with the static load balancing
that the hashing distribution provides. This impact is less severe if
the correct xmit-hashing-policy is used for the tlb setup.

The default value of the parameter is set to "1" mimicing the earlier
behavior.

Ran the netperf test with 200 stream for 1 min between two hosts with
4x1G trunk (xmit-lb mode with xmit-policy L3+4) before and after these
changes. Following was the command used for those 200 instances -

    netperf -t TCP_RR -l 60 -s 5 -H  -- -r81920,81920

Transactions per second:
    Before change: 1,367.11
    After  change: 1,470.65

Change-Id: Ie3f75c77282cf602e83a6e833c6eb164e72a0990
Signed-off-by: Mahesh Bandewar 
Signed-off-by: David S. Miller

bonding: Added bond_tlb_xmit() for tlb mode.

2014-04-24T17:04:34+00:00

Re-organized the xmit function for the lb mode separating tlb xmit
from the alb mode. This will enable use of the hashing policies
like 802.3ad mode. Also extended use of xmit-hash-policy to tlb mode.

Now the tlb-mode defaults to BOND_XMIT_POLICY_LAYER2 if the xmit policy
module parameter is not set (just like 802.3ad, or Xor mode).

Change-Id: I140257403d272df75f477b380207338d0f04963e
Signed-off-by: Mahesh Bandewar 
Acked-by: Eric Dumazet 
Signed-off-by: David S. Miller

bonding: document the new _arp options for arp_validate

2014-02-18T21:47:15+00:00

CC: Jay Vosburgh 
CC: Andy Gospodarek 
Signed-off-by: Veaceslav Falico 
Signed-off-by: David S. Miller

bonding: permit using arp_validate with non-ab modes

2014-02-18T21:47:14+00:00

Currently it's disabled because it's sometimes hard, in typical configs, to
make it work - because of the nature how the loadbalance modes work - as
it's hard to deliver valid arp replies to correct slaves by the switch.

However we still can use arp_validation in loadbalance with several other
configs, per example with arp_validate == 2 for backup with one broadcast
domain, without the switch(es) doing any balancing - this way we'd be (a
bit more) sure that the slave is up.

So, enable it to let users decide which one works/suits them best. Also
correct the mode limitation from BOND_OPT_ARP_VALIDATE.

CC: Nikolay Aleksandrov 
CC: Jay Vosburgh 
CC: Andy Gospodarek 
Signed-off-by: Veaceslav Falico 
Acked-by: Nikolay Aleksandrov 
Signed-off-by: David S. Miller

bonding: update bonding.txt for primary description

2014-01-23T01:45:32+00:00

Signed-off-by: Ding Tianhong 
Signed-off-by: David S. Miller

bonding: update Documentation/networking/bonding.txt for option lp_interval

2013-12-31T05:40:31+00:00

Signed-off-by: Ding Tianhong 
Signed-off-by: David S. Miller

bonding: document the new packets_per_slave option

2013-11-07T20:10:21+00:00

Add new documentation for the packets_per_slave option available
for balance-rr mode.

Signed-off-by: Nikolay Aleksandrov 
Signed-off-by: David S. Miller

bonding: document the new xmit policy modes and update the changed ones

2013-10-03T19:36:38+00:00

Add new documentation for encap2+3 and encap3+4, also update the formula
for the old modes due to the changes.

Signed-off-by: Nikolay Aleksandrov 
Signed-off-by: David S. Miller