Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()

[Arjan van de Ven]

On Tue, 2005-08-16 at 13:54 +0900, Hiro Yoshioka wrote:
> Takahashi san,
> 
> I appreciate your comments.
> 
> > Hi,
> > 
> > BTW, what are you going to do with the page-faults which may happen
> > during __copy_user_zeroing_nocache()? The current process may be blocked
> > in the handler for a while and get FPU registers polluted.
> > kernel_fpu_begin() won't help the case. This is another issue, though.
> 
> My code does nothing do it.
> 
> I need a volunteer to implement it.

it's actually not too hard; all you need is to use SSE and not MMX; and
then just store sse register you're overwriting on the stack or so...



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/