On Thu, Jun 08, 2006 at 10:39:48PM +0300, Lars Wirzenius wrote: > Fixing this would require having every increment of the jiffies counter > to check for overflow, and using two counters. This is unnecessary > overhead (a very small overhead, granted, but still), for a very small > benefit.
No it wouldn't; it'd just require you to have two extra ints, and something that
ran every so often (and as part of any syscall that tells userspace the uptime),
that does:
static unsigned last_uptime = 0;
static unsigned wraps = 0;
if (uptime < last_uptime) wraps++;
last_uptime = uptime;
You could probably even do it in userspace, really, with some care.
Cheers,
aj
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