UDP LOR with the latest RELENG_7

[Jeremy Chadwick]

On Fri, Oct 10, 2008 at 03:40:26PM +0300, 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:
> 
> -- cut here --
> --- syscall (97, FreeBSD ELF64, socket), rip = 0x80070427c, rsp =
> 0x7fffffffe8c8, rbp = 0x516348 ---
> 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 = 0x516348 ---
> -- and here --
> 
>    I tried to see whether bz@ had this one on his page, but his
> website is currently being migrated and the list of LORs was
> unavailable. Therefore, sorry if this mail is just noise...

Your mail says "latest RELENG_7".  What is "latest?"  When did you csup?
rwatson@ made some UDP-related changes recently which were very
important.

-- 
| 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 |