On 09/30/15 at 02:37pm, Dave Young wrote:
> > I think 1st kernel parameter is only for boot device.
non-boot you still need
> > pass extra parameter to 2nd kernel cmdline.
> > Again about the second question, have you consider the situation both 1 and 2
> > used? ie. 1) for crash device, 2) for root device.
> I tested both boot and non-boot device as dumping target, and it works
> on beaker machine.
But how does it work? suppose rd.* param are mandatory, who will pass it to 2nd kernel?
Suppose below case:
rootfs: a local scsi disk sda
after bootup, one can setup a non-boot disk for kdump ie. sdb.
There should be nothing in boot param.
For iSCSI HBA, the only way to bring up is to append the rd.* in the
command. Thus the kernel will export this device.
If there is no proper parameter in command, the device cann't be
visible, including 1st kernel.