From b3a8a40da5751525936c88f60bbc6a007f9eee37 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 13 Sep 2006 19:51:02 -0700 Subject: [TCP]: Turn ABC off. Turn Appropriate Byte Count off by default because it unfairly penalizes applications that do small writes. Add better documentation to describe what it is so users will understand why they might want to turn it on. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- Documentation/networking/ip-sysctl.txt | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 3e0c017e7877..90ed78110fd4 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -102,9 +102,15 @@ inet_peer_gc_maxtime - INTEGER TCP variables: tcp_abc - INTEGER - Controls Appropriate Byte Count defined in RFC3465. If set to - 0 then does congestion avoid once per ack. 1 is conservative - value, and 2 is more agressive. + Controls Appropriate Byte Count (ABC) defined in RFC3465. + ABC is a way of increasing congestion window (cwnd) more slowly + in response to partial acknowledgments. + Possible values are: + 0 increase cwnd once per acknowledgment (no ABC) + 1 increase cwnd once per acknowledgment of full sized segment + 2 allow increase cwnd by two if acknowledgment is + of two segments to compensate for delayed acknowledgments. + Default: 0 (off) tcp_syn_retries - INTEGER Number of times initial SYNs for an active TCP connection attempt -- cgit v1.2.1 From 72c4a13aaa0f6271e6b962a66befd68bac923bc3 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Wed, 13 Sep 2006 19:57:18 -0700 Subject: [IPVS]: Document the ports option to ip_vs_ftp in kernel-parameters.txt I'm not sure if documenting this here is appropriate, but if it is, here is some text to put there. Signed-Off-By: Simon Horman Signed-off-by: David S. Miller --- Documentation/kernel-parameters.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 7947cede8712..87a17337c7f6 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -697,6 +697,12 @@ running once the system is up. ips= [HW,SCSI] Adaptec / IBM ServeRAID controller See header of drivers/scsi/ips.c. + ports= [IP_VS_FTP] IPVS ftp helper module + Default is 21. + Up to 8 (IP_VS_APP_MAX_PORTS) ports + may be specified. + Format: ,.... + irqfixup [HW] When an interrupt is not handled search all handlers for it. Intended to get systems with badly broken -- cgit v1.2.1 From 080f22c0dc544e498e57ad281a9de063fa839957 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 13 Sep 2006 21:13:54 -0700 Subject: [NET]: Mark frame diverter for future removal. The code for frame diverter is unmaintained and has bitrotted. The number of users is very small and the code has lots of problems. If anyone is using it, they maybe exposing themselves to bad packet attacks. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- Documentation/feature-removal-schedule.txt | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'Documentation') diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index d1cd5f93e028..552507fe9a7e 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -281,3 +281,16 @@ Why: The deferred output hooks are a layering violation causing unusual Who: Patrick McHardy --------------------------- + +What: frame diverter +When: November 2006 +Why: The frame diverter is included in most distribution kernels, but is + broken. It does not correctly handle many things: + - IPV6 + - non-linear skb's + - network device RCU on removal + - input frames not correctly checked for protocol errors + It also adds allocation overhead even if not enabled. + It is not clear if anyone is still using it. +Who: Stephen Hemminger + -- cgit v1.2.1