Hi Christoph,
On 9/8/20 1:55 PM, Christoph Hellwig wrote:
On Tue, Sep 08, 2020 at 06:36:19AM +0100, Christoph Hellwig wrote:
On Mon, Sep 07, 2020 at 09:18:50PM +0100, Tom Murphy wrote:
Yeah we talked about passing an attr to map_sg to disable merging at
the following microconfernce:
https://linuxplumbersconf.org/event/7/contributions/846/
As far as I can remember everyone seemed happy with that solution. I
won't be working on this though as I don't have any more time to
dedicate to this. It seems Lu Baolu will take over this.
I'm absolutely again passing a flag. Tha just invites further
abuse. We need a PCI ID based quirk or something else that can't
be as easily abused.
Also, I looked at i915 and there are just three dma_map_sg callers.
The two dmabuf related ones are fixed by Marek in his series, leaving
Do you mind telling where can I find Marek's series?
Best regards,
baolu
just the one in i915_gem_gtt_prepare_pages, which does indeed look
very fishy. But if that one is so hard to fix it can just be replaced
by an open coded for_each_sg loop that contains manual dma_map_page
calls.
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