Btw, jiffies is now stored as a 64 bit variable internally in the kernel (not 32 bit), although to maintain compatibility with the older code, it can be still 'treated' as a 32-bit variable. In reality, overflow would take a lot more time than 497 days, but if you read only the first 32 bits, then you are right about the 497 day thing.
~Gaurav On Thu, Sep 20, 2012 at 8:30 PM, Dave Hylands <[email protected]> wrote: > Hi, > > On Thu, Sep 20, 2012 at 7:09 AM, Fan Yang <[email protected]> wrote: > > hi all: > > As far as I known, the var jiffies in the kernel will overflow > after > > 497days as the Hz defined 100. So what waill happen when the jiffies > > overflow? > > It will start back at zero. > > Everything should continue to work as before. > > In fact, jiffies are initialized to -300 seconds, so that it will > overflow 5 minutes after startup, just to verify that everything works > properly. > > -- > Dave Hylands > Shuswap, BC, Canada > http://www.davehylands.com > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > -- Gaurav Jain Associate Software Engineer VxVM Escalations Team, SAMG Symantec Software India Pvt. Ltd.
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