[Intel-gfx] sna: Experimental support for write-combining mmaps (wc-mmap)

[Sedat Dilek]

Hi,

I am playing with wc-mmap [1]... (and sent a trivial patch [0]).

Inspecting my logs...

$ egrep 'wc|mmap'
logs/build-and-install-log_XF86-Video-Intel-v2-99-916-137-g0aa2edb_WCMMAP_llvm-3-4-2.txt
  Experimental support: TearFree mmap(wc)

$ egrep -i 'wc|mmap|write|comb' /var/log/Xorg.0.log
[ EMPTY ]

TearFree [1] can be set via an option in xorg.conf.
Doing a very quick look into the sources, such a flag/option is not recognized.

How do I see if wc-mmap is enabled/active on my desktop?

Thanks in advance.

Regards,
- Sedat -

[0] http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=e96520327bd2ef4fbc7b7b5169a17b966d9f85f3
[1] http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=87802b3402ec4a829c6507b4b78fcd03e30b6fe1
[2] http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=717e00facd27696c6b8a1a6c343b2f94bfa2b59b