Re: 2.2.0pre1 OOPS on boot.

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 31 Dec 1998 18:56:49 +0000 (GMT)


> However, in some cases the _algorithm_ may actually change with rdtsc is
> available and reliable. gettimeofday() was one such case, but as long as
> it is only one, we can still fix it up pretty easily. But do you intend to
> continue to fix up cases forever? I don't.

Thats why I fixed up a jump, you can change the algorithm all you like,
Im just avoiding the indirect function call overhead for the fast case by
patching JMP 8bit relative over the bytes in the code. That works well enough
for me.

> i386 case is one of those "major algorithm change" things - when WP
> doesn't work correctly, copying to user space is just SOO different that I
> refuse to even consider not doing it like we have done it for years).

I looked at 386, hard, and have to agree

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