From: Wei Liu <wei.liu2@citrix.com>
Date: Wed, 3 Jun 2015 10:10:42 +0000 (+0100)
Subject: tcp: double default TSQ output bytes limit
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~163^2~136
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c39c4c6abb89d24454b63798ccbae12b538206a5;p=pandora-kernel.git

tcp: double default TSQ output bytes limit

Xen virtual network driver has higher latency than a physical NIC.
Having only 128K as limit for TSQ introduced 30% regression in guest
throughput.

This patch raises the limit to 256K. This reduces the regression to 8%.
This buys us more time to work out a proper solution in the long run.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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