From: David Miller <davem@davemloft.net>
To: airlied@gmail.com
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.sourceforge.net
Subject: Re: drm + 4GB RAM + swiotlb = drm craps out
Date: Sun, 01 Apr 2007 22:24:38 -0700 (PDT) [thread overview]
Message-ID: <20070401.222438.74736622.davem@davemloft.net> (raw)
In-Reply-To: <21d7e9970704012215n67487549vbc7592a4f181e288@mail.gmail.com>
From: "Dave Airlie" <airlied@gmail.com>
Date: Mon, 2 Apr 2007 15:15:48 +1000
> > Perhaps we'll have to create something ugly like vmalloc_nobounce().
> >
> > Remind me again why you're ending up with swiotlb'd pages?
> > vmalloc_32() uses GFP_KERNEL which should use entirely lowmem and thus
> > RAM below 4GB and not anything which should need bounce buffering.
>
> On a 64-bit machine GFP_KERNEL can give me any memory... it all works
> fine on 32-bit highmem kernel as I don't get highmem... I really need
> __GFP_DMA32 memory but we don't have a generic allocator that gives
> this out that I can see..
That clears things up thanks.
Perhaps the other uses of vmalloc_32() want GFP_32 semantics too,
although I didn't check.
next prev parent reply other threads:[~2007-04-02 5:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-01 23:44 drm + 4GB RAM + swiotlb = drm craps out Dave Airlie
2007-04-02 3:11 ` David Miller
2007-04-02 4:08 ` Dave Airlie
2007-04-02 5:08 ` David Miller
2007-04-02 5:15 ` Dave Airlie
2007-04-02 5:24 ` David Miller [this message]
2007-04-02 6:27 ` Andi Kleen
2007-04-02 5:38 ` Dave Airlie
2007-04-02 6:40 ` Andi Kleen
2007-04-02 6:52 ` Dave Airlie
2007-04-02 6:55 ` Andi Kleen
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