Re: panic: sbdrop


On Wed, 28 Feb 2007, Paulius Bulotas wrote:

we have two Sun Fire X4100 running quite recent current: FreeBSD 7.0-CURRENT #0: Fri Feb 23 21:12:46 EET 2007 root@anti:/usr/obj/usr/src/sys/GENERIC amd64

and they both panic once a day or two with:

If this is the panic I think it is, I have a patch that may help at:

http://www.watson.org/~robert/freebsd/netperf/20070223-udp-sbdrop.diff

I've handed this patch off to Kris to test but as you've no doubt seen from the lists, he's being kept well out of trouble with all the scalability work, so I've not had a definitive answer as to whether it resolves the issues for him.

Thanks,

Robert N M Watson
Computer Laboratory
University of Cambridge


panic: sbdrop
cpuid = 1
KDB: enter: panic
[thread pid 68163 tid 100266 ]
Stopped at kdb_enter+0x2f: nop
db> bt
Tracing pid 68163 tid 100266 td 0xffffff00abdb47b0
kdb_enter() at kdb_enter+0x2f
panic() at panic+0x225
sbdrop_internal() at sbdrop_internal+0x1bd
sbflush_internal() at sbflush_internal+0x3c
sbrelease_internal() at sbrelease_internal+0x1c
sofree() at sofree+0x1ea
soclose() at soclose+0x249
soo_close() at soo_close+0x3f
fdrop_locked() at fdrop_locked+0xc8
closef() at closef+0x324
kern_close() at kern_close+0x15d
syscall() at syscall+0x1ef
Xfast_syscall() at Xfast_syscall+0xab
--- syscall (6, FreeBSD ELF64, close), rip = 0x800c7a3cc, rsp = 0x7fffffffec48, rbp = 0 ---

it seems, there is open PR with similar panic, but difference backtrace:
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/96042

any ideas?

TIA
Paulius
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