Messages in this thread Patch in this message |  | | From | Cody P Schafer <> | Subject | [PATCH 4/9] mm/page_alloc: add a VM_BUG in __free_one_page() if the zone is uninitialized. | Date | Thu, 17 Jan 2013 14:52:56 -0800 |
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From: Cody P Schafer <jmesmon@gmail.com>
Freeing pages to uninitialized zones is not handled by __free_one_page(), and should never happen when the code is correct.
Ran into this while writing some code that dynamically onlines extra zones.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> --- mm/page_alloc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e2574ea..f8ed277 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -530,6 +530,8 @@ static inline void __free_one_page(struct page *page, unsigned long uninitialized_var(buddy_idx); struct page *buddy; + VM_BUG_ON(!zone_is_initialized(zone)); + if (unlikely(PageCompound(page))) if (unlikely(destroy_compound_page(page, order))) return; -- 1.8.0.3
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