Messages in this thread | | | Date | Mon, 12 May 2014 08:57:20 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [PATCH] mm: use a irq-safe __mod_zone_page_state in mlocked_vma_newpage() |
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On Sat, 10 May 2014, Jianyu Zhan wrote:
> mlocked_vma_newpage() is only called in fault path by > page_add_new_anon_rmap(), which is called on a *new* page. > And such page is initially only visible via the pagetables, and the > pte is locked while calling page_add_new_anon_rmap(), so we need not > use an irq-safe mod_zone_page_state() here, using a light-weight version > __mod_zone_page_state() would be OK.
This has nothing to do with the safety of statistics operations that work on different data structures. Which leads to the conclusion that __mod_page_state cannot be used here.
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