On Mon, Oct 24, 2016 at 12:43:26PM +0100, Jeremy Harris wrote: > On 24/10/16 04:05, Phil Pennock wrote: > > On 2016-10-24 at 02:34 +0100, Jeremy Harris wrote: > >> Of course, secondary thoughts, we don't know that the same sequences > >> of library calls on FreeBSD as on Linux will do what's wanted. > > > https://people.freebsd.org/~pkelsey/tfo-tools/ > > server: > rc = setsockopt(listen_fd, IPPROTO_TCP, TCP_FASTOPEN, > &on, sizeof(on)); > > > * Need to guard against flag being undef > > Done for TCP_FASTOPEN, probably need to do for MSG_FASTOPEN. > > > * Need to gracefully handle the setsockopt() call failing > > > > OK, so > > - The library call sequence is identical > > - Use IPPROTO_TCP where Linux has SOL_TCP > > - The current coding for failures on the server side is > ok (just ignore the setsockopt failure; we get a > non-fastopen socket as before) for non-supporting kernels > > - The current coding for failures on the client side > needs thought. I made it log-noisy but functional > on the grounds that you do an extra syscall > [the sendto(..., MSG_FASTOPEN, ...)] getting a fail > every time on non-supporting kernels. There is > a transport control, defaulting to enabled. > > Adding probe code in process startup might help, though > the re-execs we do defeat that. Queue-runners would be > ok but most deliveries are probably foreground. > > Should I change the default to not-enabled, for the > medium-term?
Well there are other BSDs to here from. Anyone from NetBsd, OpenBSD, DragonFly et al get the same error? > -- > Cheers, > jeremy > > -- > ## List details at https://lists.exim.org/mailman/listinfo/exim-users > ## Exim details at http://www.exim.org/ > ## Please use the Wiki with this list - http://wiki.exim.org/ -- Member - Liberal International This is doctor@@nl2k.ab.ca Ici doctor@@nl2k.ab.ca God,Queen and country!Never Satan President Republic!Beware AntiChrist rising! http://www.fullyfollow.me/rootnl2k Look at Psalms 14 and 53 on Atheism Time for the USA to hold a referendum on its republic and vote to dissolve!! -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
