jiffies wrap question...

From: Jeff Garzik (jgarzik@mandrakesoft.com)
Date: Fri Nov 10 2000 - 02:21:28 EST


The following is a piece of code from the latter half of
schedule_timeout, in kernel/sched.c. Is it possible that
schedule_timeout could return an incorrect value, if the jiffy value
wraps between the first and last lines shown below.

        expire = timeout + jiffies;

        init_timer(&timer);
        timer.expires = expire;
        timer.data = (unsigned long) current;
        timer.function = process_timeout;

        add_timer(&timer);
        schedule();
        del_timer_sync(&timer);

        timeout = expire - jiffies;

-- 
Jeff Garzik             |
Building 1024           | Would you like a Twinkie?
MandrakeSoft            |
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