Tejun Heo wrote:
This patch implements libata.force module parameter which can
selectively override ATA port, link and device configurations
including cable type, SATA PHY SPD limit, transfer mode and NCQ.
...
+       libata.force=   [LIBATA] Force configurations.  The format is comma
+                       separated list of "[ID:]VAL" where ID is
+                       PORT[:DEVICE].  PORT and DEVICE are decimal numbers
+                       matching port, link or device.  Basically, it matches
..

Mmm.. not a NAK, but is there also a way to set/change these on the fly?

I ask because, on my 4-core test system here, libata enumerates
the ports differently depending upon whether I boot with a 32-bit
kernel or a 64-bit kernel.

Major PITA, that, and it's just the kind of thing that spoils
fixed "PORT:DEVICE" module parameters, too.

Now mind you, it's more likely the PCI layer that does the reverse
order thing, but the end result is that my drives/ports are numbered
differently depending upon which kernel I happen to boot with.

??
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