On 11/13/19 10:59 AM, Ira Weiny wrote:
On Tue, Nov 12, 2019 at 08:26:56PM -0800, John Hubbard wrote:
Introduce pin_user_pages*() variations of get_user_pages*() calls,
and also pin_longterm_pages*() variations.
These variants all set FOLL_PIN, which is also introduced, and
thoroughly documented.
The pin_longterm*() variants also set FOLL_LONGTERM, in addition
to FOLL_PIN:
pin_user_pages()
pin_user_pages_remote()
pin_user_pages_fast()
pin_longterm_pages()
pin_longterm_pages_remote()
pin_longterm_pages_fast()
At some point in this conversation I thought we were going to put in "unpin_*"
versions of these.
Is that still in the plans?
Why yes it is! :) Daniel Vetter and Jan Kara both already weighed in [1],
in favor of "unpin_user_page*()", rather than "put_user_page*()".
I'll change those names.
[1] https://lore.kernel.org/r/20191113101210.gd6...@quack2.suse.cz
thanks,
--
John Hubbard
NVIDIA
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