Re: [PATCH RFC 6/6] PM / Hibernate: exclude all PageOffline() pages

Pavel Machek
2018-11-15T17:54:56Z

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On Wed 2018-11-14 22:17:04, David Hildenbrand wrote:
> The content of pages that are marked PG_offline is not of interest
> (e.g. inflated by a balloon driver), let's skip these pages.
>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>

Acked-by: Pavel Machek <pavel@ucw.cz>

> diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
> index b0308a2c6000..01db1d13481a 100644
> --- a/kernel/power/snapshot.c
> +++ b/kernel/power/snapshot.c
> @@ -1222,7 +1222,7 @@ static struct page *saveable_highmem_page(struct zone *zone, unsigned long pfn)
> BUG_ON(!PageHighMem(page));
>
> if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page) ||
> - PageReserved(page))
> + PageReserved(page) || PageOffline(page))
> return NULL;
>
> if (page_is_guard(page))
> @@ -1286,6 +1286,9 @@ static struct page *saveable_page(struct zone *zone, unsigned long pfn)
> if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page))
> return NULL;
>
> + if (PageOffline(page))
> + return NULL;
> +
> if (PageReserved(page)
> && (!kernel_page_present(page) || pfn_is_nosave(pfn)))
> return NULL;

--
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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