Adding new option to ktrace

[Scott Long]

Nikhil Dharashivkar wrote:
> Hi Scott and Rajesh,
>      Thanks for replying me. Basically what happend, while testing
> scsi driver on freebsd, at  some point it crashes. So, there is no way
> to know how much IO is performed. To know the IO state just before the
> driver fails, i selected ktrace to print IO information whatever i ll
> get from dastrategy routine.

You have reason to believe that certain I/O patterns cause the crash?
What driver is being used?  What is the crash?

Scott