On Friday, April 14, 2017 12:41:52 PM Maxim Sobolev wrote: > Thanks, Peter. I will try to look into this asap.
I don't understand what is going on yet. Presumably there must be other changes in play that affect udp/select sometime between the original 2015 change and this. The syslogd -s code is Old(TM). I'm also wondering whether the -s code even works at all since the 2015 / r285910 change... > -Max > > On Apr 14, 2017 12:32 PM, "Peter Wemm" <pe...@wemm.org> wrote: > > On Friday, April 14, 2017 11:49:26 AM Peter Wemm wrote: > > > On Friday, April 14, 2017 05:23:28 PM Maxim Sobolev wrote: > > > > Author: sobomax > > > > Date: Fri Apr 14 17:23:28 2017 > > > > New Revision: 316874 > > > > URL: https://svnweb.freebsd.org/changeset/base/316874 > > > > > > > > Log: > > > > Restore ability to shutdown DGRAM sockets, still forcing ENOTCONN to > > > > be > > > > > > returned by the shutdown(2) system call. This ability has been lost as > > > > part > > > > of the svn revision 285910. > > > > > > > > Reviewed by: ed, rwatson, glebius, hiren > > > > MFC after: 2 weeks > > > > Differential Revision: https://reviews.freebsd.org/D10351 > > > > > > This appears to have broken syslogd and had a major change in behavior > > > > with > > > > > regards to select(2). > > > > > > If you run syslogd with the -s flag (which is default), it now spins at > > > > 100% > > > > > cpu as all the shutdown sockets now return readable from select. > > > > > > Old releases / jails also manifest this behavor. If it wasn't for > > > losing > > > the ability to run old branch binaries I'd suggest changing syslogd > > > instead, but we depend on this in the cluster and I expect others do > > > too. > > > > > > I'm not 100% certain that this change is the culprit but a heads-up > > > can't > > > hurt. I'll try reverting it on the freebsd cluster next, after fixing > > > the > > > broken auditing changes. > > > > > > -Peter > > > > I can confirm that reverting r316874 fixes syslogd and backwards > > compatability > > with old branches. > > > > -- > > Peter Wemm - pe...@wemm.org; pe...@freebsd.org; pe...@yahoo-inc.com; > > KI6FJV > > UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246 -- Peter Wemm - pe...@wemm.org; pe...@freebsd.org; pe...@yahoo-inc.com; KI6FJV UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246
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