Re: Runaway cron task on 2.5.63/4 bk?

Andrew Morton
2003-03-11T22:39:06Z

george anzinger <george@mvista.com> wrote:
>
> Ok, here is what I have. I changed nano sleep to use a local 64-bit
> value for the target expire time in jiffies. As much as MAX-INT/2-1
> will be put in the timer at any one time. It loops till the target
> time is met or exceeded. The changes affect (clock)nanosleep only and
> not timers (they still error out for large values).
>
> Issues: The conversion of timespec to jiffies_64 is most easily done
> by the asm mpy instruction, which results in the required 64 bit
> result, but C doesn't want to do this sort of thing.

gcc will generate 64bit * 64bit multiplies without resorting to
any library code and you can probably do the division with do_div().