Re: [PATCH *] use 64 bit jiffies

From: Robert de Bath (robert$
Date: Tue Feb 04 2003 - 03:27:38 EST

On Tue, 4 Feb 2003, Denis Vlasenko wrote:

> Jiffy Wrap Bugs
> There were reports of machines hanging on jiffy wrap.
> This is typically a result of incorrect jiffy use in some driver.
> Ask Tim - he is hunting those problems regularly, but he is outnumbered
> by buggy driver authors. :(
> There is a better solution to ensure correct jiffy wrap handling in
> *ALL* kernel code: make jiffy wrap in first five minutes of uptime.
> Tim has a patch for such config option. This is almost right.
> This MUST NOT be a config option, it MUST be mandatory in every
> kernel. Driver writers would be bitten by their own bugs and will
> fix it themself. Tim, what do you think?

How about an option, either the jiffy timer wraps at 5 minutes or
process 1 gets sent a SIGINT after 24 hours ? That way a driver
with an MIA author can still be used even if it's buggy, just not
for very long.

Okay ... perhaps it should be just an option of jiffy wrap at 5 mins
or 24 hours, but I still think reboot is better :-) :-P

Rob.                          (Robert de Bath <robert$ @>)
Google Homepage:

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to More majordomo info at Please read the FAQ at

This archive was generated by hypermail 2b29 : Fri Feb 07 2003 - 22:00:14 EST