On 8/6/19 11:34 PM, Christoph Hellwig wrote:
On Mon, Aug 05, 2019 at 03:54:35PM -0700, John Hubbard wrote:
On 7/23/19 11:17 PM, Christoph Hellwig wrote:
...
I think we can do this in a simple and better way. We have 5 ITER_*
types. Of those ITER_DISCARD as the name suggests never uses pages, so
we can skip handling it. ITER_PIPE is rejected іn the direct I/O path,
which leaves us with three.
Hi Christoph,
Are you working on anything like this?
I was hoping I could steer you towards it. But if you don't want to do
it yourself I'll add it to my ever growing todo list.
Sure, I'm up for this. The bvec-related items are the next logical part
of the gup/dma conversions to work on, and I just wanted to avoid solving the
same problem if you were already in the code.
Or on the put_user_bvec() idea?
I have a prototype from two month ago:
http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/gup-bvec
but that only survived the most basic testing, so it'll need more work,
which I'm not sure when I'll find time for.
I'll take a peek, and probably pester you with a few questions if I get
confused. :)
thanks,
--
John Hubbard
NVIDIA
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