From 8b2f74f2258b62ca0e62656cdccbc9159aeab893 Mon Sep 17 00:00:00 2001 From: Sebastian Sumpf Date: Tue, 6 Aug 2013 16:12:54 +0200 Subject: [PATCH] L4Linux: Increase TCP-window size TCP window size is calculated by the amount of memory within L4Linux, use a larger window size to allow acceptable performance even on smaller VMs. --- net/ipv4/tcp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index e220207..29613bf 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3648,6 +3648,13 @@ void __init tcp_init(void) tcp_init_mem(&init_net); /* Set per-socket limits to no more than 1/128 the pressure threshold */ limit = nr_free_buffer_pages() << (PAGE_SHIFT - 7); + + /* + * Adjust limit so it performs well on systems with little memory. If + * this causes errors increase L4Linux main memory + */ + limit = limit < 1024U * 1024 ? 1024U * 1024 : limit; + max_wshare = min(4UL*1024*1024, limit); max_rshare = min(6UL*1024*1024, limit); -- 1.8.4