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image, reboots and then users get a rescue system trough ssh. From this
point, the user can flash a new kernel and initrd which will ignore the
'root=...' the kernel argument.
All theses steps are done without serial console. Due to this wrong
memory size setting, this can't be done on ss4000e. One has to find a
serial cable (not always easy) and then not forget to every time add
the 'mem=...' stuff. Moreover, it's more fool proof. A rescue with
memory limited to 256M will always work.

I hope this will help you to ack or nack the patch.

Thanks,
Arnaud