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

Hirokazu Takahashi
2005-08-16T10:29:25Z

Hi,

> > > > 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...
> >
> > oh, really? Does the linux kernel take care of
> > SSE save/restore on a task switch?
>
> not on kernel entry afaik.
> However just save the register on the stack and put it back at the
> end...

I think this have to be done in the pagefault handlers.

Thanks,
Hirokazu Takahashi.