Re: Race condition in module load causing undefined symbols

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K.R. Foley wrote:

Steve Lord wrote:
<snip>


So is this some P4 specific optimization which is not working as
intended?

Steve
I'd say not since the first system I saw this on was a dual PIII Xeon. While I am not 100% sure that the problems are related, the problem that I saw on my 2.6 system also went away when I disabled hyper-threading in the bios. It really just seems to me like it is some hard-to-trigger race. 



Not too hard for me :-(

Definitely a race, and it appears to be somewhere in the fork/exec/wait
complex at the very least. insmod is not built into nash, so is getting
run as a seperate process. Since module loading itself is synchronous,
the error would seem most likely to be happening in sys_wait4.

It could be the compiler doing a bad optimization, it could be
some other optimization code triggered by the Pentium 4 config
option, or, as you say, it could be a race which is being
opened up by the changed build flags.

Steve
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