Messages in this thread | | | Date | Sat, 11 Oct 2003 21:44:03 +0200 (MEST) | From | "Howard Duck" <> | Subject | observation: sata problems when using devfs with 2.6.0beta7 |
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Hi
I understand that devfs is deprecated, and i personally don't need (or suggest) this issue to be fixed - but there are maybe some people that run into this problem too, and they may profit from this information... Now here's the story: I have a intel 865pe based mainboard with 4 pata devices and one sata disk (the one i boot off). Gentoo linux "needs" devfs support therefore i added it to my kernel config. When i booted i got following warning/debug messages:
irq: 18 nobody cared! *some hex output i was too lazy to write down* Disabling IRQ #18
IRQ 18 is assigned to the SATA controller (there are also a few lkml posts that describe this error). At first i thought it was some problem with sata - to verify this i started to test with a almost featureless kernel and added one feature after another to see what breaks the system. The irq18 problem only appeared when i added devfs support to the kernel. I have no real proof that devfs support affects the sata controller/disk, but i built many different kernel configs and whenever i added devfs support the irq18 warnings appeared, and whenever i removed devfs support they did not appear - so i guess devfs is the actual problem.
I currently run gentoo-linux with a SMP enabled 2.6.0beta7 kernel with alsa and the nvidia-drivers but without devfs support. Everything works fine for me, seems like devfs support isn't that badly needed for gentoo ;) to turn off support for it simply add gentoo=nodevfs to your kernel boot-parameters. Creating the /dev entries for alsa can be done with the snddevices script provided by the alsa-driver source package. I didn't need any other /dev nodes, because i don't have USB
peripherals and the likes...
now on to the gentoo-developers persuading them to drop the devfs dependency
;) Michael Kefeder
p.s.: i'm not subscribed to lkml - please put me on CC when answering.
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