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