[hobbit] Rrd not updating

[Sloan]

Henrik Stoerner wrote:
> On Tue, Mar 25, 2008 at 09:40:12AM -0700, Sloan wrote:
>   
>> Henrik Stoerner wrote:
>>     
>>> On Tue, Mar 25, 2008 at 02:12:42PM +0100, Charles Goyard wrote:
>>>   
>>>       
>>>> On our setup, the problem comes from a counter overflow in uptime
>>>> handling on some SCO : after 248 days of uptime, the uptime is reported
>>>> negative, and the rrd handler misses the expression (no "up:").
>>>>     
>>>>         
>>> Ahh - the old 31-bit timer tick issue. Linux has the same problem
>>> because a timer ticks at 100 Hz using a signed 32-bit integer; so
>>> 2^31 / (24*60*60*100) = 248 days and a bit.
>>>   
>>>       
>> That's news to me -
>>     
>
> Sorry, I should have written "Linux HAD the same problem" (past tense).
> This was fixed somewhere in the early 2.4.x kernels. That's why I wrote
> it was the "old" problem.
>   

Yes, linux used to wrap around at 497 days uptime, so it must have been 
unsigned int.

Joe