Followup to: <200104282256.f3SMuRW15999@vindaloo.ras.ucalgary.ca>
By author: Richard Gooch <firstname.lastname@example.org>
In newsgroup: linux.dev.kernel
> > In x86-64 there are special vsyscalls btw to solve this problem that export
> > a lockless kernel gettimeofday()
> Whatever happened to that hack that was discussed a year or two ago?
> The one where (also on IA32) a magic page was set up by the kernel
> containing code for fast system calls, and the kernel would write
> calibation information to that magic page. The code written there
> would use the TSC in conjunction with that calibration data.
> There was much discussion about this idea, even Linus was keen on
> it. But IIRC, nothing ever happened.
We discussed this at the Summit, not a year or two ago. x86-64 has
it, and it wouldn't be too bad to do in i386... just noone did.
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This archive was generated by hypermail 2b29 : Mon Apr 30 2001 - 21:00:21 EST