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Date:      Thu, 8 Jul 2010 15:34:06 +0400
From:      pluknet <pluknet@gmail.com>
To:        freebsd-stable <freebsd-stable@freebsd.org>
Subject:   uma_ref_cnt: vm_fault: fault on nofault entry
Message-ID:  <AANLkTilkJtgmWLyFTSNGMXVtwunngG9iu8JJhlCUJQ7C@mail.gmail.com>

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Hi.

8.0-RELEASE under xen h/w mode.
This is the first time I'm seeing this panic (uptime ~2 weeks).

http://img38.imageshack.us/img38/9681/screenshot1mm.png
Below is transcribed via OCR from a vnc session.

db> bt^M
Tracing pid 18908 tid 101404 td 0xc93f9Z40^M
kdb_enter(c0c8dceZ,c0c8dceZ,c0cab939,eb0aZ7e4,Z,...) at kdb_entert0x3a
panic(c0cab939,cl4b3000,l,eb0aZ914,eb0aZ904,...) at panict0xl36
vm_fault(cl490000,cl4b3000,l,0,c76f3400,...) at vm_fault*0xl97
trap_pfault(80000,eb0aZal0,8538,eb0aZal0,cfeeaaa0,...) at trap_pfaultt0xZ0e
trap(eb0aZa30) at trapt0x455
calltrap() at calltrap=E2=95=950x6^M
-- trap 0XC, eip =3D  0xc0af336b, esp =3D  0xeb0aZa70, ebp =3D  0xeb0aZa78 =
---^M
uma_find_refcnt(cl47a000,c7elc000,3,Z,c7elc000,...) at uma_find_refcntt0x5b
mb_ctor_clust(c7elc000,1000,cf87ce00,Z,f8,...) at mb_ctor_clustt0x9c
uma_zalloc_arg(cl47a000,cf87ce00,Z,dd0001,c798Z400,...) at uma_zalIoc_argt0=
x8a
m_getmZ(0,790c,Z,l,0,...) at m_getmZt0xb3
m_uiotombuf(eb0aZc58,Z,790c,0,0,...) at m_uiotombuf^0x77
sosend_generic(cf4c44d4,0,eb0a2c58,0,0,...) at sosend_generic*0x525
sosend(cf4c44d4,0,eb0aZc58,0,0,...) at sosendt0x3f^M
soo_write(d004d508,eb0aZc58,cdd4f600,0,c93f9Z40,...) at soo_uritet0x63
dofilewrite(eb0aZc58,ffffffff,ffffffff,0,d004d508,...) at dofilewrite*0x97
kern_writev(c93f9Z40,6,eb0aZc58,eb0aZc78,l,...) at kern_w|titevt0x58
write(c93f9Z40,eb0aZcf8,c,c0890ce8,46,...) at urite*0x4f
syscall(eb0aZd38) at syscal+0x3Z5
Xint0x80_syscall() at Xint0x80_syscal+0x20^M
--- syscall (4, FreeBSD ELF3Z, urite), eip =3D  0xZ85d4Z53, esp =3D
0xbfbfealc, ebp =3D^M
0xbfbfea38 ---

--=20
wbr,
pluknet



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