Re: [PATCH] [RFC] be more verbose when probing EDD

Parag Warudkar
2007-12-16T17:34:53Z

On Sun, 16 Dec 2007, devzero@web.de wrote:

>
> - it seems there are buggy Bios implementations out there which have problems with EDD
> - your favourite distro may have set CONFIG_EDD=y|m , so EDD probe is on by default quite often nowadays.
> - setting "edd=off" when you get that hang on boot is _not_ obvious.

It does not look like this issue is common - googling for "Linux EDD Boot
hang" does not bring up relevant and recent results - in fact this post of
yours comes on top. Further more there does not seem to be problems with
newer BIOSes so we would be irritating lot many users needlessly.

Adding 3 printks for each such obscure problem would make it even more
complex to parse and make sense of the boot log - I, for example, already
dislike the mostly-useless-to-end-user stuff it spews on a normal boot.

If there are known chipsets / BIOSes that have this problem - applying
quirks - something like this quirk for pmtmr [1]- (if they work this
early) or even special casing them with forced edd=off may be the right and more useful thing to do.

[1] http://www.webservertalk.com/archive242-2006-3-1447442.html

Parag