On 10/30/19 3:49 PM, John Hubbard wrote:
...
> +* struct page may not be increased in size for this, and all fields are
> already
> + used.
> +
> +* Given the above, we can overload the page->_refcount field by using, sort
> of,
> + the upper bits in that field for a dma-pinned count. "Sort of"
On 10/31/19 4:49 PM, Ira Weiny wrote:
> On Wed, Oct 30, 2019 at 03:49:30PM -0700, John Hubbard wrote:
...
>> +TODO: There is also a special case when the pages are DAX pages: in
>> addition to
>> +the above flags, the caller needs something like a layout lease on the
>> +associated file. This is y
On 10/31/19 4:49 PM, Ira Weiny wrote:
> On Wed, Oct 30, 2019 at 03:49:30PM -0700, John Hubbard wrote:
>> Document the new pin_user_pages() and related calls
>> and behavior.
>>
>> Thanks to Jan Kara and Vlastimil Babka for explaining the 4 cases
>> in this documentation. (I've reworded it and expan
On Wed, Oct 30, 2019 at 03:49:30PM -0700, John Hubbard wrote:
> Document the new pin_user_pages() and related calls
> and behavior.
>
> Thanks to Jan Kara and Vlastimil Babka for explaining the 4 cases
> in this documentation. (I've reworded it and expanded on it slightly.)
As I said before I thi
Document the new pin_user_pages() and related calls
and behavior.
Thanks to Jan Kara and Vlastimil Babka for explaining the 4 cases
in this documentation. (I've reworded it and expanded on it slightly.)
Cc: Jonathan Corbet
Signed-off-by: John Hubbard
---
Documentation/vm/index.rst |
