Hello,
Received two response to this query one from Bryan Lavelle and Dr. Blinn.
Dr. Blinn response is the most detailed so I am publishing his response.
Below is his response.
The "hwc" subsystem in the kernel relates to hardware
configuration management services. There are a grand total of four
references in the kernel to that string (as of V5.1):
hwc/hwc_main.c:extern int hwc_boot_old; /* Boot using old disk names
*/
hwc/hwc_main.c: {"hwc_boot_old", CFG_ATTR_INTTYPE,
CFG_OP_CONFIGURE|CFG_OP_QUERY,
hwc/hwc_main.c: (caddr_t)&hwc_boot_old, 0, 1, 0},
hwc/hwc_reg.c:int hwc_boot_old = 0;
In other words, there is no longer any actual result from setting that
variable to anything other than the default (0), and the only other
thing you could set it to would be 1. But it won't do anything, we
don't support using the old disk names in V5.1. It *might* have done
something in, say, V5.0; nope, looking at V5.0, same references. Not
used to control anything. Might have been used early in the V5.0 work
to control using the old "rz" style naming, before we had the symlinks
working in /dev..
Also in a follow up response Dr. Blinn stated:
As far as I can tell, this subsystem ("hwc") didn't even exist prior
to V5.0 (I've checked the kernel sources), and as far as I can tell
from the check I reported, the parameter does NOTHING at all.
Again thanks for the responses
jim jones
Received on Wed Feb 07 2001 - 21:38:39 NZDT