Struct page for ZONE_DEVICE private pages uses the reserved fields when
anonymous pages are migrated to device private memory. This is so
the page->mapping and page->index fields are preserved and the page can
be migrated back to system memory.
Document this in comments so it is more clear.
Signed
On 7/16/19 9:38 PM, Christoph Hellwig wrote:
On Tue, Jul 16, 2019 at 09:31:33PM -0700, John Hubbard wrote:
OK, so just delete all the _zd_pad_* fields? Works for me. It's misleading to
calling something padding, if it's actually unavailable because it's used
in the other union, so deleting wou
On Tue, Jul 16, 2019 at 09:31:33PM -0700, John Hubbard wrote:
> OK, so just delete all the _zd_pad_* fields? Works for me. It's misleading to
> calling something padding, if it's actually unavailable because it's used
> in the other union, so deleting would be even better than commenting.
>
> In t
On 7/16/19 9:22 PM, Christoph Hellwig wrote:
> On Tue, Jul 16, 2019 at 06:20:23PM -0700, John Hubbard wrote:
>>> - unsigned long _zd_pad_1;/* uses mapping */
>>> + /*
>>> +* The following fields are used to hold the source
>>> +
On Tue, Jul 16, 2019 at 06:20:23PM -0700, John Hubbard wrote:
> > - unsigned long _zd_pad_1;/* uses mapping */
> > + /*
> > +* The following fields are used to hold the source
> > +* page anonymous mapping informati
On 7/16/19 5:14 PM, Ralph Campbell wrote:
> Struct page for ZONE_DEVICE private pages uses the reserved fields when
> anonymous pages are migrated to device private memory. This is so
> the page->mapping and page->index fields are preserved and the page can
> be migrated back to system memory.
> Do
Struct page for ZONE_DEVICE private pages uses the reserved fields when
anonymous pages are migrated to device private memory. This is so
the page->mapping and page->index fields are preserved and the page can
be migrated back to system memory.
Document this in comments so it is more clear.
Signed
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