Re: [beta patch] SSE copy_page() / clear_page()

[Pavel Machek]

Hi!

> --- 2.4/mm/filemap.c  Wed Feb 14 10:51:42 2001
> +++ build-2.4/mm/filemap.c    Wed Feb 14 22:11:44 2001
> @@ -1248,6 +1248,20 @@
>               size = count;
>  
>       kaddr = kmap(page);
> +     if (size > 128) {
> +             int i;
> +             __asm__ __volatile__(
> +                     "mov %1, %0\n\t"
> +                     : "=r" (i)
> +                     : "r" (kaddr+offset)); /* load tlb entry */
> +             for(i=0;i<size;i+=64) {
> +                     __asm__ __volatile__(
> +                             "prefetchnta (%1, %0)\n\t"
> +                             "prefetchnta 32(%1, %0)\n\t"
> +                             : /* no output */
> +                             : "r" (i), "r" (kaddr+offset));
> +             }
> +     }
>       left = __copy_to_user(desc->buf, kaddr + offset, size);
>       kunmap(page);

This seems bogus -- you need to handle faults --
i.e. __prefetchnta_to_user() ;-).
                                                                Pavel
-- 
I'm [EMAIL PROTECTED] "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at [EMAIL PROTECTED]
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