[Bug 83436] Sudden framerate drops in multiple games when compiling with -mtune=generic (as well with -mtune=pentium-mmx and older CPUs)

https://bugs.freedesktop.org/show_bug.cgi?id=83436

--- Comment #35 from smoki smoki00790@gmail.com --- (In reply to Marek Olšák from comment #34)

Is this issue still happening on current Mesa git?

32bit apps on 32bit kernel are fine, as GTT_WC is disabled for X86_32:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a0...

But now issue appear too for 64bit kernel using 32bit apps, so it is still an issue. 64bit kernel and 64bit apps are not affected.

Unrelated to this driver, but i also found that 32bit fglrx is also slow on the same thing... GTT_WC while running some 32bit apps simply made things much slower. Of course no idea how to do anything with that driver to 100% approve that :)