memcg: bugfix for memory hotplug
The start pfn calculation in page_cgroup's memory hotplug notifier chain is wrong. Tested-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -165,7 +165,7 @@ int online_page_cgroup(unsigned long start_pfn,
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unsigned long start, end, pfn;
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int fail = 0;
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start = start_pfn & (PAGES_PER_SECTION - 1);
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start = start_pfn & ~(PAGES_PER_SECTION - 1);
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end = ALIGN(start_pfn + nr_pages, PAGES_PER_SECTION);
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for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION) {
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@ -188,7 +188,7 @@ int offline_page_cgroup(unsigned long start_pfn,
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{
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unsigned long start, end, pfn;
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start = start_pfn & (PAGES_PER_SECTION - 1);
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start = start_pfn & ~(PAGES_PER_SECTION - 1);
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end = ALIGN(start_pfn + nr_pages, PAGES_PER_SECTION);
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for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION)
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