On 06/24/2014 06:52 AM, Naoya Horiguchi wrote:
- low_pfn = isolate_migratepages_range(zone, cc, low_pfn, end_pfn, false);
- if (!low_pfn || cc->contended)
- return ISOLATE_ABORT;
+ /* Do not scan within a memory hole */
+ if (!pfn_valid(low_pfn))
+ continue;
+
+ page = pfn_to_page(low_pfn);
Can we move (page_zone != zone) check here as isolate_freepages() does?
Duplicate perhaps, not sure about move. Does CMA make sure that all
pages are in the same zone? Common sense tells me it would be useless
otherwise, but I haven't checked if we can rely on it.
Thanks,
Naoya Horiguchi
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