About "panic: bufwrite: buffer is not busy???"

[Mike Tancsa]

On 2/3/2011 12:11 AM, Eugene Grosbein wrote:
> On 02.02.2011 00:50, Gleb Smirnoff wrote:
> 
>> E> Uptime: 8h3m51s
>> E> Dumping 4087 MB (3 chunks)
>> E>   chunk 0: 1MB (150 pages) ... ok
>> E>   chunk 1: 3575MB (915088 pages) 3559 3543panic: bufwrite: buffer is not busy???
>> E> cpuid = 3
>> E> Uptime: 8h3m52s
>> E> Automatic reboot in 15 seconds - press a key on the console to abort
>> Can you add KDB_TRACE option to kernel? Your boxes for some reason can't
>> dump core, but with this option we will have at least trace.
> 
> I see Mike Tancsa's box has "bufwrite: buffer is not busy???" problem too.
> Has anyone a thought how to fix generation of crashdumps?

But it generates the dump despite the error message



Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 00
fault virtual address   = 0x33b9fc
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc072df2f
stack pointer           = 0x28:0xe94c2a44
frame pointer           = 0x28:0xe94c2a64
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1089 (mpd5)
trap number             = 12
panic: page fault
cpuid = 1
KDB: stack backtrace:
#0 0xc0681b07 at kdb_backtrace+0x47
#1 0xc0652d27 at panic+0x117
#2 0xc08cd873 at trap_fatal+0x323
#3 0xc08cdaf0 at trap_pfault+0x270
#4 0xc08ce035 at trap+0x465
#5 0xc08b4e6c at calltrap+0x6
#6 0xc07358df at in_leavegroup_locked+0x4f
#7 0xc07320d1 at in_control+0x13d1
#8 0xc06fb04a at ifioctl+0x1b4a
#9 0xc0698422 at soo_ioctl+0x612
#10 0xc0690c90 at kern_ioctl+0x250
#11 0xc0690e04 at ioctl+0x134
#12 0xc068d82f at syscallenter+0x30f
#13 0xc08cdb44 at syscall+0x34
#14 0xc08b4ed1 at Xint0x80_syscall+0x21
Uptime: 1d4h20m49s
Physical memory: 3574 MB
Dumping 289 MB:panic: bufwrite: buffer is not busy???
cpuid = 1
 274 258 242 226 210 194 178 162 146 130 114 98 82 66 50 34 18 2
Dump complete


> 
> Eugene Grosbein
> 
> 
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