Re: getting more that 4K out of a proc file?

[Peter T. Breuer]

"A month of sundays ago Jeff Garzik wrote:"
> "Peter T. Breuer" wrote:
> > 
> > Could someone kindly point me to an example in the source to show me
> > how to get more than a page out of a proc file on read?
> If it hasn't been updated, I think MTRR uses a static buffer which can
> be larger than 1 page.  You have to be really wary of SMP issues with
> things like that (luckily the MTRR buffer isn't very dynamic, IIRC)

Thanks. It "turns out" that returning the bytes read at each call in
*start (as well as in the return value) from a proc_read function
does the trick automagically. I think the code is very obscure. This
seems to be known by nobody. I have made a deobscurantism patch that
I'll post in a mo. It makes it more obvious that there are horrible
FIXMEs hanging in thæt code area. And yes, there are zillions of
races.

Peter