From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
Subject: [Bug 26193] nouveau falls back to NoAccel on 9400M
Date: Sun, 24 Jan 2010 16:40:35 -0800 (PST)
Message-ID: <20100125004035.56AD02DC012@annarchy.freedesktop.org>
References: <bug-26193-8800@http.bugs.freedesktop.org/>
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http://bugs.freedesktop.org/show_bug.cgi?id=26193





--- Comment #6 from Ted Phelps <phelps-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>  2010-01-24 16:40:33 PST ---
Brian: Yes, I am using a 64-bit system.

TTM_PAGE_FLAG_DMA32 is used only by ttm_tt_alloc_page(), where it causes
alloc_page() to be called with the __GFP_DMA32 flag set.  This is supposed to
cause it to return only pages in the first 4GB of RAM, so I'm baffled as to why
it's breaking anything.

FWIW, I only have 4GB of RAM in the machine, so in theory all of it could be
safe for 32-bit DMA.

I note that you're also using an x86-64 CPU, and I'd be curious to know if the
patch in comment #4 helps you.  If not, I should open a new bug report.

Thanks,
-Ted


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