From: Chris Wilson <ch...@chris-wilson.co.uk> Subject: Re: [proof-of-concept/rfc] per object file mmaps To: Dave Airlie <airl...@gmail.com>, dri-devel@lists.freedesktop.org In-Reply-To: <1355892119-13926-1-git-send-email-airl...@gmail.com> References: <1355892119-13926-1-git-send-email-airl...@gmail.com>
On Wed, 19 Dec 2012 14:41:56 +1000, Dave Airlie <airl...@gmail.com> wrote: > The 2+3 patches are actually the code, the first was just a cleanup. > > Anyways the second patch describes it best, but I've taken the approach > that we just need to keep track of what filp this object has had a handle > created on, and block mmaps on it. We could also probably block a bit > more explicitly in the driver respective mmap offset retrieval ioctls, > however we need to block in mmap itself to stop people just picking misc > address and trying them. > > It doesn't really add much now, but with render nodes where we have flink_to > or fd passing it would be more useful. > > I've no idea if I'll get to do much more with this, so consider it an > indication of how I'd like it done for someone else to run with :-) Locking looks entirely non-existent for per-file mmap add/remove in the generic gem code. Also we have a pair of hooks there that look like they would be a convenient point to place that code. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
