Messages in this thread |  | | Date | Tue, 20 Aug 1996 11:12:53 +0200 (MET DST) | From | Ingo Molnar <> | Subject | Re: Jiffies Wraparound (was Re: interrupt counts) |
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On 20 Aug 1996, Thomas Koenig wrote:
> In linux.dev.kernel, Linus Torvalds <torvalds@cs.Helsinki.FI> wrote: > > >In _many_ places we do the jiffies handling correctly. Not in every place, > >though (or even most places). > > What about adding an option 'Test jiffie wraparound' to the > 'kernel hacking' section of the configuration? This could be used > to set that jiffies wrap around (configurable via a boot option, > for example). I'm sure there are people who would like to try this > out :-)
I've tested it once by setting jiffies to 0xFFFFF000 in main.c, and nothing bad happened. Some of the hardware timeouts are handled by using absolute jiffies values and comparing them with <, but these timers are usually for error detection. Important timings are done with kernel timers, and they are wraparound-insensitive :)
And who needs timers with more than 400 days timeout :) [well ...]
-- mingo
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