Messages in this thread | | | Date | Fri, 29 Feb 2008 20:44:57 +0100 | From | Ingo Molnar <> | Subject | Re: printk timestamps jumping back and forth in 2.6.25-rc. |
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* David Miller <davem@davemloft.net> wrote:
> From: Paul Mackerras <paulus@samba.org> > Date: Fri, 29 Feb 2008 22:11:26 +1100 > > > On powerpc we use the timebase register, which is synchronized across > > CPUs, so if this will add unnecessary overhead, we will want to way to > > turn it off on powerpc (assuming this ends up going upstream). > > Similarly on sparc64, all of our TSCs are fully synchronized so this > complexity is completely unnecessary.
i suspect for them the easiest way is to expose time_sync_thresh and let them set it to ULONG_MAX - which skips all synchronization overhead and complexity.
Ingo
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