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Eric Dumazet e4d8f491c9 bonding: refine bond_fold_stats() wrap detection

[ Upstream commit 142c6594ac ]

Some device drivers reset their stats at down/up events, possibly
fooling bonding stats, since they operate with relative deltas.

It is nearly not possible to fix drivers, since some of them compute the
tx/rx counters based on per rx/tx queue stats, and the queues can be
reconfigured (ethtool -L) between the down/up sequence.

Lets avoid accumulating 'negative' values that render bonding stats
useless.

It is better to lose small deltas, assuming the bonding stats are
fetched at a reasonable frequency.

Fixes: 5f0c5f73e5 ("bonding: make global bonding stats more reliable")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-03-22 09:23:22 +01:00

bond_3ad.c

bonding: simplify / unify event handling code for 3ad mode.

2015-11-02 22:52:24 -05:00

bond_alb.c

vlan: kill vlan_put_tag helper

2014-11-21 14:20:17 -05:00

bond_debugfs.c

net: Move bonding headers under include/net

2014-11-10 13:27:49 -05:00

bond_main.c

bonding: refine bond_fold_stats() wrap detection