On Sun, Sep 03, 2006 at 08:08:02AM +0200, Jean Delvare wrote: > Greg KH wrote: > > On Sat, Sep 02, 2006 at 10:57:03PM +0200, Jean Delvare wrote: > > > The bus driver msleep()s, so it's rather an uninterruptible sleep? > > > > Yes it is. > > > > > Not that I know what different it makes in that context. > > > > When you sleep in the kernel, in an uninterruptable state, it increases > > the load average spit out by the kernel by 1. Now this really doesn't > > make that much sense, as the code is sleeping and not doing anything at > > all, but it plays havoc on tools that look at the load average of the > > machine to see what is going on. > > > > That might be why users think the driver is taking up more cpu time than > > it really is, but it all depends on how they were measuring it. > > OK, Thanks for the explanation. Isn't it possible to change the kernel > to not count sleeping processes in the load? That'd make people happier, > and the value more meaningful. >From what I remember, no, it is not simple to do this. But feel free to poke at it, I really don't know how that code works :) good luck, greg k-h
