Nah, yes for me too... i tried that Marek's memory pressured patches even before rc1 and that seems like does not work bug free so i tried that nearly month ago and got a hang . I tried FORCED game actually to test that new feature, game allocate more then 512MB on beauty settings and i limited it to that to see what will happens and got a hang . Great thing i can force amount of ram used as vram on AM1, so i can continue playing without a hang .I see hangs with kernel 3.15 and SI under memory pressure, e.g. if
>>>>> I boot
>>>>> with radeon.vramlimit=256 and then run Xonotic timedemo with high
>>>>> I haven't had a chance to bisect it yet, but it might be a similar
As for Xonotic i dont see much of the slowness maybe let say around -2% here in 3.15 vs 3.14 And i think i dont see anything from those PTE patches . all that seems like more pointed for dedicated / powerfull cards .