tree ee9c848444134a92a77dfab024e3c7b6c14183e2
parent 0dc1df05988820a5f51621ca373988082e155e53
author Eric Dumazet <edumazet@google.com> 1638329566 -0800
committer Jakub Kicinski <kuba@kernel.org> 1638414369 -0800

Revert "net: snmp: add statistics for tcp small queue check"

This reverts commit aeeecb889165617a841e939117f9a8095d0e7d80.

The new SNMP variable (TCPSmallQueueFailure) can be incremented
for good reasons, even on a 100Gbit single TCP_STREAM flow.

If we really wanted to ease driver debugging [1], this would
require something more sophisticated.

[1] Usually, if a driver is delaying TX completions too much,
this can lead to stalls in TCP output. Various work arounds
have been used in the past, like skb_orphan() in ndo_start_xmit().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Menglong Dong <imagedong@tencent.com>
Link: https://lore.kernel.org/r/20211201033246.2826224-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>