Am Montag 08 Mai 2006 08:07 schrieb David S. Miller: > What is so special about what linkwatch is doing such > that it needs this kind of treatment and other similar > pieces or code do not? > > We have all sorts of interfaces such as time_after() et el. > in order to deal with wrapping issues.
time_after() and friends can handle jiffies wrapping, however they require the difference between compared times to be less than 0x80000000 jiffies (about 24 days on HZ=1000) to work reliably on 32bit architectures. So if the network is stable for 24 days, events generated within days 25-49 will suffer a *huge* false delay. > And furthermore > using 64-bit jiffies here might not be appropriate because > they are not guarenteed to be accessed atomically, get_jiffies_64() handles this transparently. Stefan - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
