Messages in this thread | | | Date | Tue, 25 Jan 2011 17:45:49 -0500 | From | Jeff Garzik <> | Subject | Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic |
| |
On 01/25/2011 05:16 PM, Randy Dunlap wrote: > On Tue, 25 Jan 2011 17:10:49 -0500 Mark Lord wrote: > >> On 11-01-25 12:05 PM, Ahmed S. Darwish wrote: >>> >>> My current x86 laptop includes the very common ATA PIIX controller. >> >> >> ata_piix is just about ideal for this sort of thing. >> >> Except, don't use the BIOS to write the logs, >> but rather code/use a very simple set of polling-PIO >> functions to talk directly through the PIIX to the drive. >> >> Really really simple code to do that, and it would likely >> work with anything ata-piix, and most other non-AHCI chipsets too. >> >> Not perfect, but probably good enough for a lot of scenarios. >> The old hd.c driver shows how to read/write a sector at a time, >> and that kind of code is easily converted to simply poll for completion. > > I don't know how/where to find it, but Rusty Russell had a version of this > many, many years ago.
You beat me to the reply :)
http://lwn.net/Articles/9905/
but IIRC there were updates and improvements.
| |