Date: Sun, 28 Aug 2016 20:54:37 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Adrian Chadd <adrian@freebsd.org> Cc: Bruce Simpson <bms@fastmail.net>, Ryan Stone <rysto32@gmail.com>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, Ryan Stone <rstone@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org> Subject: Re: svn commit: r304436 - in head: . sys/netinet Message-ID: <20160828175437.GP88122@zxy.spb.ru> In-Reply-To: <CAJ-Vmo=txJPgfbz6UANF619i4DXRELfct6HVJ-8nS=tK0geXUA@mail.gmail.com> References: <20160826151324.GF88122@zxy.spb.ru> <CAJ-Vmomg6ejJdZessaUU3DF%2BV%2BsQd=hMZwo_pDYpa4XjoB_ZcA@mail.gmail.com> <20160826213613.GH88122@zxy.spb.ru> <CAJ-VmomRDdg5EUUiAHOyVBzitd8cZ8bPGCrU9btnveWeW-_85g@mail.gmail.com> <20160826220255.GI88122@zxy.spb.ru> <CAJ-VmomFuh07_vBi%2BzdNrPs3%2BDni1AtYh_VNKbnACydbCxr7gw@mail.gmail.com> <20160827004617.GJ88122@zxy.spb.ru> <CAJ-VmokC-8hW6uJaORLFQmb_nHdevHbVbBGVS3xGghs3jOKofg@mail.gmail.com> <20160828133012.GN88122@zxy.spb.ru> <CAJ-Vmo=txJPgfbz6UANF619i4DXRELfct6HVJ-8nS=tK0geXUA@mail.gmail.com>
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On Sun, Aug 28, 2016 at 10:20:08AM -0700, Adrian Chadd wrote:
> * the rtalloc1_fib thing - that's odd, because it shouldn't be
> contending there unless there's some temporary redirect that's been
> learnt. What's the routing table look like on your machine? I Remember
> investigating the rtentry reference counting a while ago and concluded
> that .. it's terrible, and one specific corner case was checking for
> routes from redirects. I'll look at my notes again and see what I
> find.
JFYI:
kernel`rtalloc1_fib+0x6d
kernel`rtalloc_ign_fib+0xcc
kernel`ip_output+0x3a5
kernel`tcp_output+0x1852
kernel`tcp_timer_rexmt+0x60e
kernel`softclock_call_cc+0x17b
kernel`softclock+0x94
kernel`intr_event_execute_handlers+0xab
kernel`ithread_loop+0x96
kernel`fork_exit+0x9a
kernel`0xffffffff806c8e0e
176868370
kernel`ip_output+0x3a5 is sys/netinet/ip_output.c:282
/*
* We want to do any cloning requested by the link layer,
* as this is probably required in all cases for correct
* operation (as it is for ARP).
*/
if (rte == NULL) {
#ifdef RADIX_MPATH
rtalloc_mpath_fib(ro,
ntohl(ip->ip_src.s_addr ^ ip->ip_dst.s_addr),
inp ? inp->inp_inc.inc_fibnum : M_GETFIB(m));
#else
in_rtalloc_ign(ro, 0,
inp ? inp->inp_inc.inc_fibnum : M_GETFIB(m));
#endif
rte = ro->ro_rt;
}
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