On 7 Jul, Jeff Roberson wrote:
> On Sat, 6 Jul 2002, Jeff Roberson wrote:
>> - Use 'options DEBUG_VFS_LOCKS' instead of the DEBUG_ALL_VFS_LOCKS
>> environment variable to enable the lock verifiction code.
> This was previously disabled because our locking was so bad that we could
> not boot with this option enabled. I can now boot, compile a kernel, and
> reboot without catching any locking asserts. This means that we are safe
> at our current level of debugging, but we are certainly not out of the
> woods wrt VFS locking yet.
>
> If you have a crash test box I would appreciate it if you would enable
> this kernel option. If it catches any errors you will be droped into the
> debugger where you can get a backtrace (type: tr) and mail it to me &&
> current@ to avoid dups.
It wasn't able to sucessfully boot with this enabled. I'm hand
transcribing this, so apologies for any typos:
[fsck finishes]
Doing initial network setup: host.conf hostname.
VOP_READ: 0xc6737800 is not locked but should be
Debugger("Lock violation.
")
Debugger(c0420fe4) at Debugger+0x45
vn_rdwr(0,c6737800,c6425000,55ac,0,0,1,8,c22c7200,df241aec,c22cc0c0) at
vn_rdwr+0x18d
linker_hints_lookup(c04750a0,c,c62df000,5,0) at
linker_hints_lookup+0x2d9
linker_search_module(c62df000,5,0,0,c0415120) at
linker_search_module+0x43
linker_load_module(0,c62df000,0,0,df241cdc) at linker_load_module+0x72
kldload(c22cc0c0,df241d14,1,0,296) at kldload+0xc3
syscall(...)
If I disable the panic and continue the boot process, I see the
following in dmesg:
da0 at ahc0 bus 0 target 0 lun 0
da0: <SEAGATE ST336706LW 010A> Fixed Direct Access SCSI-3 device
da0: 160.000MB/s transfers (80.000MHz, offset 63, 16bit), Tagged Queueing Enable
d
da0: 35003MB (71687370 512 byte sectors: 255H 63S/T 4462C)
/usr/src/sys/vm/uma_core.c:1332: could sleep with "kernel linker" locked from /u
sr/src/sys/kern/kern_linker.c:1798
VOP_READ: 0xc6737800 is not locked but should be
VOP_GETVOBJECT: 0xc6737800 is not locked but should be
VOP_GETVOBJECT: 0xc6737800 is not locked but should be
VOP_BMAP: 0xc6737800 is not locked but should be
VOP_GETVOBJECT: 0xc6737800 is not locked but should be
VOP_GETVOBJECT: 0xc6737800 is not locked but should be
VOP_READ: 0xc6737800 is not locked but should be
VOP_READ: 0xc6737800 is not locked but should be
VOP_READ: 0xc6737800 is not locked but should be
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