On Wed, 02 Jan 2008 10:55:21 +0100 Michael Kerrisk <mtk.manpages@xxxxxxxxxxxxxx> wrote: > > > Stephen Hemminger wrote: > > On Fri, 14 Dec 2007 09:48:32 +0100 > > Michael Kerrisk <mtk.manpages@xxxxxxxxxxxxxx> wrote: > > > >> Hello Linux networking folk, > >> > >> I received the patch below for the tcp.7 man page. Would anybody here be > >> prepared to review the new material / double check the details? > >> > >> Cheers, > >> > >> Michael > >> > >> -------- Original Message -------- > >> Subject: [patch] add tcp congestion control relevant parts > >> Date: Wed, 12 Dec 2007 16:40:23 +0100 > >> From: Thomas Egerer <thomas.Egerer@xxxxxxxxxxx> > >> To: mtk.manpages@xxxxxxxxx > >> CC: linux-man@xxxxxxxxxxxxxxx > >> > >> Hello *, > >> > >> man-pages version : 2.70 from http://www.kernel.org/pub/linux/docs/man-pages/ > >> All required information were obtained by reading the kernel > >> code/documentation. > >> I'm not sure, whether it is completely bullet proof on when the sysctl > >> variables/socket option first appeared in the kernel, so you might as well > >> drop this information, but I'm pretty sure about how it works. > >> Here we go with my patch: > >> > >> diff -ru man-pages-2.70/man7/tcp.7 man-pages-2.70.new/man7/tcp.7 > >> --- man-pages-2.70/man7/tcp.7 2007-11-24 14:33:34.000000000 +0100 > >> +++ man-pages-2.70.new/man7/tcp.7 2007-12-12 16:34:52.000000000 +0100 > >> @@ -177,8 +177,6 @@ > >> .\" FIXME As at Sept 2006, kernel 2.6.18-rc5, the following are > >> .\" not yet documented (shown with default values): > >> .\" > >> -.\" /proc/sys/net/ipv4/tcp_congestion_control (since 2.6.13) > >> -.\" bic > >> .\" /proc/sys/net/ipv4/tcp_moderate_rcvbuf > >> .\" 1 > >> .\" /proc/sys/net/ipv4/tcp_no_metrics_save > >> @@ -224,6 +222,20 @@ > >> are reserved for the application buffer. > >> A value of 0 > >> implies that no amount is reserved. > >> +.TP > >> +.BR tcp_allowed_congestion_control \ > >> +" (String; default: cubic reno) (since 2.6.13) " > >> +Show/set the congestion control choices available to non-privileged > >> +processes. The list is a subset of those listed in > >> +.IR tcp_available_congestion_control "." > >> +Default is "cubic reno" and the default setting > >> +.RI ( tcp_congestion_control ). > >> +.TP > >> +.BR tcp_available_congestion_control \ > >> +" (String; default: cubic reno) (since 2.6.13) " > >> +Lists the TCP congestion control algorithms available on the system. This > >> value > >> +can only be changed by loading/unloading modules responsible for congestion > >> +control. > >> .\" > >> .\" The following is from 2.6.12: Documentation/networking/ip-sysctl.txt > >> .TP > >> @@ -257,6 +269,17 @@ > >> Allows two flows sharing the same connection to converge > >> more rapidly. > >> .TP > >> +.BR tcp_congestion_control " (String; default: cubic reno) (since 2.6.13) " > >> +Determines the congestion control algorithm used for newly created TCP > >> +sockets. By default Linux uses cubic with reno as fallback. If you want > >> +to have more control over the algorithm used, you must enable the symbol > >> +CONFIG_TCP_CONG_ADVANCED in your kernel config. > > > > You can choose the default congestion control as well as part of the kernel > > configuration. > > Hi Stephen, > > Other than this, did the doc patch look okay? (I'm not sure whether there > was an implied ACK in your message for the rest of the patch.) > > Cheers, > > Michael > Yes, and having this documented will hopefully help answer people's questions. -- Stephen Hemminger <stephen.hemminger@xxxxxxxxxx> - To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
