Re: [gentoo-amd64] Gentoo crashing?

[Isidore Ducasse]

le Wed, 16 May 2007 01:03:42 +0200
"Hemmann, Volker Armin" <volker.armin.hemmann@××××××××××××.de> a écrit:
> >
> > Yes, I use nvidia-drivers and udev keeps loading the nvidiafb LKM,
>
> why are you building the nvidiafb crap in the first place?
>
>

As far as I remember, I used the default genkernel. Now in fact, and though stated differently on NVIDIA_HOWTO , nvidia LKM works fine here even with nvidiafb loaded. It's just that I have no framebuffer functionality.


To stick to the subject: (Why was his gentoo crashing all of a sudden?) this "Kernel hacking" option seems to be enabled by default by genkernel. It caused my brother's dual core machine to turn into a black screen under X:

 Linux Kernel v2.6.20-gentoo-r8 Configuration
 ──────────────────────────────────────────────────────────────────────────────
  ┌────────────────────────── Detect Soft Lockups
──────────────────────────┐ │
CONFIG_DETECT_SOFTLOCKUP:
Say Y here to enable the kernel to detect "soft lockups",
which are bugs that cause the kernel to loop in kernel
mode for more than 10 seconds, without giving other tasks a
chance to run.                                                          │

When a soft-lockup is detected, the kernel will print the current stack trace (which you should report), but the system will stay locked up. This feature has negligible overhead.


(Note that "hard lockups" are separate type of bugs that can be detected via the NMI-watchdog, on platforms that support it.)
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