Linux device mapper to scsi devices mapping

[Tarak Reddy]

Hello,

I am facing thought time to understanding the code flow to find the
mapping b/w device mapper devices to scsi_devices when multipath, and
LVM configuration has been involved.

When we create LVM using scsi disks with mutipath configuration how
the request queues will be handled. Can you any please explain the
code flow from block layer to underlying scsi device when LVM with
mutipath configuration setup.

[郭高峰]

在 2012年4月10日星期二UTC+8下午7时01分53秒，Tarak Reddy写道：
> Hello,
>
> you can use systemtap to print the invoke stack.
for example:
probe kernel.function("scsi_request_fn"){
printf("[%s].\n", execname())
print_backtrace();