Displaying 3 results from an estimated 3 matches for "pg_logically_offlin".
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pg_logically_offline
2019 Oct 18
0
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
...the
> pfn_to_online_page will touch the page's content nor the state. Now
pfn_to_online_page() does not check against PG_offline. (which is
correct IMHO. As documented, PG_offline means "logically offline".
The memmap is valid, however the page content should not be accessed.
(PG_logically_offline would have been ugly ;) ).
But that shouldn't be an issue right now.
> admin might want to offline/hotremove the whole memory block via sysfs.
The admin can only trigger offlining via sysfs. Hotremove is under
control of the driver. (removing the whole memory block)
And with the curren...
2019 Oct 18
2
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
On Wed 16-10-19 16:14:52, David Hildenbrand wrote:
> On 16.10.19 16:03, Michal Hocko wrote:
[...]
> > But why cannot you keep the reference count at 1 (do get_page when
> > offlining the page)? In other words as long as the driver knows the page
> > has been returned to the host then it has ref count at 1. Once the page
> > is returned to the guest for whatever reason it
2019 Oct 18
2
[PATCH RFC v3 6/9] mm: Allow to offline PageOffline() pages with a reference count of 0
On Wed 16-10-19 16:14:52, David Hildenbrand wrote:
> On 16.10.19 16:03, Michal Hocko wrote:
[...]
> > But why cannot you keep the reference count at 1 (do get_page when
> > offlining the page)? In other words as long as the driver knows the page
> > has been returned to the host then it has ref count at 1. Once the page
> > is returned to the guest for whatever reason it