Date: Fri, 10 Oct 2008 08:44:04 -0700 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Vlad GALU <dudu@dudu.ro> Cc: rwatson@freebsd.org, freebsd-stable@freebsd.org Subject: Re: UDP LOR with the latest RELENG_7 Message-ID: <20081010154404.GA36021@icarus.home.lan> In-Reply-To: <ad79ad6b0810100824i6a8203e2gc2293b0abc4ef756@mail.gmail.com> References: <ad79ad6b0810100540w7a84d70ajd60cb575149914ef@mail.gmail.com> <200810101458.m9AEw2KI082581@lava.sentex.ca> <ad79ad6b0810100811x2a871854ve326f54fc3e0a680@mail.gmail.com> <20081010152116.GA35404@icarus.home.lan> <ad79ad6b0810100824i6a8203e2gc2293b0abc4ef756@mail.gmail.com>
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On Fri, Oct 10, 2008 at 06:24:59PM +0300, Vlad GALU wrote: > On Fri, Oct 10, 2008 at 6:21 PM, Jeremy Chadwick <koitsu@freebsd.org> wrote: > > On Fri, Oct 10, 2008 at 06:11:25PM +0300, Vlad GALU wrote: > >> On Fri, Oct 10, 2008 at 5:57 PM, Mike Tancsa <mike@sentex.net> wrote: > >> > At 08:40 AM 10/10/2008, Vlad GALU wrote: > >> >> > >> >> As my kernel had started to lock up periodically and I don't have > >> >> hands-on access to that machine, I enabled WITNESS. > >> >> So these started to pop up: > >> > > >> > Is this with a stock kernel and sysctl settings ? Or do you have any custom > >> > kernel options ? > >> > >> Jeremy pointed to a possible culprit - running csup again brought > >> uipc_usrreq.c to version 1.206.2.5. I'm rebuilding a new kernel with > >> this revision as I type and I'll see how it goes. I'm attaching the > >> sysctl.conf below just to be safe: > > > > I remember LORs pertaining to UDP being discussed recently. > > > > Possibly relevant threads: > > > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/thread.html#45020 > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/thread.html#45109 > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/thread.html#45193 > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/thread.html#45231 > > > > The last one is rwatson's fix, and confirmation from a couple people > > that it fixes their issues. > > I've rebuilt the kernel, the LORs are still there :( > -- cut here -- > --- syscall (97, FreeBSD ELF64, socket), rip = 0x80070427c, rsp = > 0x7fffffffe8c8, rbp = 0x5269c8 --- > uma_zalloc_arg: zone "16" with the following non-sleepable locks held: > exclusive rw udp r = 0 (0xffffffff8064c928) locked @ > /usr/src/sys/netinet/udp_usrreq.c:1125 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > witness_warn() at witness_warn+0x241 > uma_zalloc_arg() at uma_zalloc_arg+0x290 > malloc() at malloc+0x5c > getenv() at getenv+0x93 > getenv_quad() at getenv_quad+0x13 > getenv_int() at getenv_int+0x15 > udp_inpcb_init() at udp_inpcb_init+0x1f > slab_zalloc() at slab_zalloc+0x1ad > uma_zone_slab() at uma_zone_slab+0xb4 > uma_zalloc_arg() at uma_zalloc_arg+0x31d > in_pcballoc() at in_pcballoc+0x38 > udp_attach() at udp_attach+0x57 > socreate() at socreate+0x14f > socket() at socket+0x8a > syscall() at syscall+0x1a9 > Xfast_syscall() at Xfast_syscall+0xab > --- syscall (97, FreeBSD ELF64, socket), rip = 0x80070427c, rsp = > 0x7fffffffe8c8, rbp = 0x5269c8 --- > -- and here -- > > I'll see whether the system still locks up or not though.. Okay, I'm bringing rwatson@ into the thread since this is specific to UDP. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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