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SubjectRe: kernel: ldt allocation failed
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This problem is very familiar.  It was fixed in an -ac patch against
2.4.9 (although I don't recall the exact one), and is included in
subsequent Linus kernels. Without this fix, I experienced similar
problems with X on multiprocessor workstations.

Jeffrey H. Ingber (jhingber _at_ ix.netcom.com)

On Fri, 2001-12-07 at 00:40, Kiril Vidimce wrote:
>
> We suddenly started seeing freezing problems on a number of machines
> in the past couple of days. There is no pattern as far as I can tell.
> It has happened while running OpenGL apps, netscape, or even when not
> doing anything. The machine will usually just hang and while it's
> still pingable, it's totally unresponsive and you can't remotely log in.
> The 2.4.3 kernel usually hangs forever; the machines with 2.4.9
> kernels usually come back within 10-15 secs.
>
> Every time this happens we see the following message in the system log:
>
> Dec 6 21:29:00 stranger kernel: ldt allocation failed
>
> The machines are:
>
> Hardware:
> - IBM Intellistation M Pro
> - dual 2 GHz P4's
> - 2 GB RAM
> - NVIDIA Quadro DCC card
>
> Software:
> - Red Hat 7.1
> - kernel 2.4.3smp or 2.4.9smp
> - XFree 4.1
> - Ximian Gnome 1.4
> - NVIDIA drivers 1.0-1541
>
> Once this problem occurs, even if the hang is temporary, the machine
> is extremely flakey. Almost any app will start causing ldt allocation
> failure messages in the system log. Only a reboot really helps.
>
> Questions:
> - Does this ring a bell to anybody? What is ldt anyway and what would
> cause an allocation to fail?
>
> - I still keep one of these messages in this state. Is there anything
> I can probe to get useful debugging info?
>
> Any help would greatly be appreciated.
>
> Thanks,
> KV
> --
> ___________________________________________________________________
> Studio Tools vkire@pixar.com
> Pixar Animation Studios http://www.pixar.com/
>
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