• Andi Kleen's avatar
    [PATCH] x86-64: Add __copy_from_user_nocache · 0812a579
    Andi Kleen authored
    This does user copies in fs write() into the page cache with write combining.
    This pushes the destination out of the CPU's cache, but allows higher bandwidth
    in some case.
    
    The theory is that the page cache data is usually not touched by the
    CPU again and it's better to not pollute the cache with it. Also it is a little
    faster.
    Signed-off-by: default avatarAndi Kleen <ak@suse.de>
    0812a579
copy_user_nocache.S 4.07 KB