Re: [PATCH v1 8/8] PM / Hibernate: exclude all PageOffline() pages

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



If you are adding PageOffline(page) to the condition list of the already existing if in
saveable_highmem_page(), why explicitly add it as a separate statement in saveable_page()?

It would seem more consistent to make the second check:

-	if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page))
+	if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page) ||
+		PageOffline(page))

instead.

It's admittedly a nit but it just seems cleaner to either do that or, if your intention
was to separate the Page checks from the swsusp checks, to break the calls to
PageReserved() and PageOffline() into their own check in saveable_highmem_page().

Thanks!
    -- Bill
     

> On Nov 19, 2018, at 3:16 AM, David Hildenbrand <david@xxxxxxxxxx> wrote:
> 
> --- 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;
> -- 
> 2.17.2
> 





[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]

  Powered by Linux