Re: cache problem

[Ken T. <ke...@we...>]

On Sat, 29 Sep 2001, Rene Brothuhn wrote:

> OK, I`l describe it. If you use __get_free_pages(GFP_ATOMIC, 1) you get 
> 2 pages and you will probably apply 8192 to the size argument of 
> kernel_set_cachemode(). Thats OK.
> But if you apply sizeof(struct x) to the size argument and sizeof(struct 
> x) isn`t a multiply of PAGE_SIZE then the last page is not remapped by 
> kernel_set_cachemode(). Because the loop in kernel_set_cachemode() is 
> initialized at value: size = size / PAGE_SIZE.
> If size = 10000, so you have to remap 3 pages, but 10000 / 4096 = 
> 2(u_long) and the loop only remaps 2 pages.
> 
> I hope now its clear what I mean.

Yes, clear as mud ;)

> > Thinking about yet another play with the A4091...

Well, I won't bother then as nothing's affected. 

Thanks, Ken.