>
> In message <[EMAIL PROTECTED]>, Matthew Dillon writes:
> >
> >:> NFS uses the kernel 'boottime' structure to generate its version id.
> >:> Now normally you might believe that this structure, once set, will
> >:> never change. The authors of NFS certainly make that assumption!
> >:
> >:Is this another case of "lets assume the time of day is a random number" or
> >:is there any underlying assumption about time in this ?
> >:
> >:--
> >:Poul-Henning Kamp FreeBSD coreteam member
> >:[EMAIL PROTECTED] "Real hackers run -current on their laptop."
> >
> > It basically needs to be a unique for each server reboot in order
> > to allow clients to resynchronize.
>
> Ok, then I suggest that you cache a copy of the boottime in the NFS
> code for this purpose.
>
Ack, I was using this very same thing for several devices in an isolated
peer-to-peer network to decide who the 'master' was. (Whoever had been up
longest knew more about the state of the network) Having this change could
cause weirdness for me too... I assumed (without checking *thwap*) that
boottime was a constant.
Perhaps a 'real_boottime' or 'unadjusted_boottime' that gets copied after
'boottime' gets initialized so that others can use it, not just NFS? :)
Kevin
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