Re: SCSI target mode LOR

Attila Nagy wrote:

> Hello,
> 
> I'm doing some experiments with FreeBSD target mode support on Fibre 
> Channel and thought that I should give CURRENT a try too.
> 
> The machine itself is an HP BL25p with 8 GB of RAM (but hw.physmem set 
> to under 4G, it seems the isp driver needs this) and dual Opterons. 
> Running amd64 code.
> 
> This is what I get after issuing
> scsi_target -A -S -T -W 32 2:0:0 /data/file1
> 
> lock order reversal: (sleepable after non-sleepable)
>  1st 0xffffffff808ce680 targ global (targ global) _at_ 
> /usr/src/sys/cam/scsi/scsi_target.c:418
>  2nd 0xffffffff808e98c0 kernel environment (kernel environment) _at_ 
> /usr/src/sys/kern/subr_hints.c:117
> KDB: stack backtrace:
> witness_checkorder() at witness_checkorder+0x4f9
> _sx_slock() at _sx_slock+0x4d
> res_find() at res_find+0x41a
> resource_find() at resource_find+0x7e
> resource_find_dev() at resource_find_dev+0x5f
> cam_periph_alloc() at cam_periph_alloc+0x1df
> targioctl() at targioctl+0x3a7
> giant_ioctl() at giant_ioctl+0x65
> devfs_ioctl_f() at devfs_ioctl_f+0x6f
> ioctl() at ioctl+0x147
> syscall() at syscall+0x517
> Xfast_syscall() at Xfast_syscall+0xa8
> --- syscall (54, FreeBSD ELF64, ioctl), rip = 0x800909aac, rsp = 
> 0x7fffffffbb98, rbp = 0x7fffffffe700 ---
> 
> Thanks,
> 

Hi,

Please file a PR on this and assign it to me.  I'll be working in this
area soon.

Scott