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    SubjectRe: [patch] Prefetching file_read_actor()
    On Mon, 31 Dec 2001, Dave Jones wrote:

    > diff -urN --exclude-from=/home/davej/.exclude linux-2.5.2-pre5/mm/filemap.c linux-2.5/mm/filemap.c
    > --- linux-2.5.2-pre5/mm/filemap.c Sun Dec 16 23:21:24 2001
    > +++ linux-2.5/mm/filemap.c Mon Dec 31 03:22:51 2001
    > @@ -1570,6 +1570,15 @@
    > size = count;
    >
    > kaddr = kmap(page);
    > +
    > + if (size > 128) {
    > + int i;
    > + for(i=0; i<size; i+=64) {
    > + prefetch (kaddr+offset);
    > + prefetch (kaddr+offset+(L1_CACHE_BYTES*2));

    Neat piece of deep magic, please document it ;)

    Rik
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