Sleep and Wake up

[Greg KH]

On Mon, May 02, 2011 at 11:32:32AM -0700, Abu Rasheda wrote:
> I am testing my driver on much faster host processor and facing
> following issues:
> 
> My host is too powerful and it can fill up device buffer queue very fast.

What kind of device is this?

> I get best performance when I do busy wait, but this is not desirable
> and is bad design.
> 
> I need to sleep and wake up quickly and predictability. Indication
> from device that queue has space, is coming in form of memory write
> (device writes to a memory location of i86 processor).
> 
> I tried using wait_event_interruptible_timeout, I am depending on 2nd
> parameter of the function but it wake up is too slow, even tried using
> value of 1.

Why not try increasing the buffer in your driver to handle any amount of
data needed?

thanks,

greg k-h