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(parent: d136184) | patch
tcp: fix delayed acks behavior for SO_RCVLOWAT
authorEric Dumazet <edumazet@google.com>
Mon, 16 Apr 2018 17:33:36 +0000 (10:33 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 16 Apr 2018 22:26:37 +0000 (18:26 -0400)
commit796f82eafcd96629c2f9a0332dbb4f474854aaf8
treed758c4141548f9a997602c3beb25e1ca26bad54etree | snapshot
parentd1361840f8c519eaee9a78ffe09e4f0a1b586846commit | diff
tcp: fix delayed acks behavior for SO_RCVLOWAT

We should not delay acks if there are not enough bytes
in receive queue to satisfy SO_RCVLOWAT.

Since [E]POLLIN event is not going to be generated, there is little
hope for a delayed ack to be useful.

In fact, delaying ACK prevents sender from completing
the transfer.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c diff | blob | history
Domain: System / Kernel;