Date: Sat, 15 Jan 2011 00:44:19 +0600 From: Eugene Grosbein <egrosbein@rdtc.ru> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-net@freebsd.org, Przemyslaw Frasunek <przemyslaw@frasunek.com> Subject: panic: bufwrite: buffer is not busy??? Message-ID: <4D309983.70709@rdtc.ru> In-Reply-To: <4D30458D.30007@sentex.net> References: <4D3011DB.9050900@frasunek.com> <4D30458D.30007@sentex.net>
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On 14.01.2011 18:46, Mike Tancsa wrote: >> I'm using mpd 5.5 on three PPPoE routers, each servicing about 300 PPPoE >> concurrent sessions. Routers are based on Intel SR1630GP hardware platforms and >> runs FreeBSD 7.3-RELEASE. >> >> I'm experiencing stability issues related to Netgraph. None of above routers can >> survive more than 20-30 days of uptime under typical load. There are different >> flavors of kernel panics, but all are somehow related to netgraph. Typical >> backtraces follow > > I also have stability issues on RELENG_8. > > http://www.freebsd.org/cgi/query-pr.cgi?pr=153497 And for one of my servers (8.2-PRERELEASE/amd64 with 4GB RAM) I just cannot obtain crashdump, it cannot finish to write it. For example, it happened an hour ago: Fatal trap 12: page fault while in kernel mode cpuid = 2; apic id = 04 fault virtual address = 0x200000040 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff803cc979 stack pointer = 0x28:0xffffff80ec09c630 frame pointer = 0x28:0xffffff80ec09c6b0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 32220 (mpd5) trap number = 12 panic: page fault cpuid = 2 Uptime: 23h45m12s Physical memory: 4080 MB Dumping 564 MB:panic: bufwrite: buffer is not busy??? cpuid = 2 Uptime: 23h45m13s Automatic reboot in 15 seconds - press a key on the console to abort Another time it panices and could not finish to write crashdump another way: Fatal trap 12: page fault while in kernel mode cpuid = 3; apic id = 06 fault virtual address = 0x60 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff803e4baf stack pointer = 0x28:0xffffff80e96d1a20 frame pointer = 0x28:0xffffff80e96d1a30 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 0 (dummynet) trap number = 12 panic: page fault cpuid = 3 Uptime: 2d2h33m4s Dumping 4087 MB (3 chunks) chunk 0: 1MB (150 pages)Sleeping thread (tid 100100, pid 0) owns a non-sleepable lock
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