Hi everybody, I have some code that convert an timeout comming from userspace (in ms) to jiffies prior passing to wait_event_interrupitible_timeout(). The code looks like this: unsigned long tout = user.timeout * HZ / 1000; /* convert from ms to jiffie */ int status = wait_event_interruptible_timeout(wq, cond, tout); I'm using HZ=100, the known default. The problem is: with HZ = 100 and user.timeout = 10 I have: 10 * 100 / 1000 = 1, This means that I can't use timeouts with less than 10ms. Is there any way to circunvent this without changing HZ value? Now let me explain why. I have a protocol running on linux that talk to other embedded systems in an master-slave way. This communication goes through some RF hardware. The communication is maded by master transmitting a frame and receiving another frame from slave. The slave takes about 2 ms to reply, but if the transmitting failed (because the slave was not listening or because the frame was corrupted while traveling through the air) the server has to transmit it again. Today I'm using 10ms as timeout because is the smaller amount that I known how to use, but if I can decrease this timeout to 2 or 3ms I would have a better performance in case of failures. Best regards, -- "Do or do not. There is no try" Yoda Master _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
