On 02/16/2010 11:12 AM, Rik van Riel wrote: > On 02/16/2010 11:52 AM, Chris Friesen wrote: >> On 02/15/2010 11:00 AM, Rik van Riel wrote: > >>> Removal from the LRU is done from the page freeing code, on >>> the final free of the page. > >> There are a bunch of inline functions involved, but I think the chain >> from page_remove_rmap() back up to unmap_vmas() looks like this: >> >> page_remove_rmap >> zap_pte_range >> zap_pmd_range >> zap_pud_range >> unmap_page_range >> unmap_vmas >> >> So in this scenario, where do the pages actually get removed from the >> LRU list (assuming that they're not in use by anyone else)? > > __page_cache_release For the backtrace scenario I posted it seems like it might actually be release_pages(). There seems to be a plausible call chain: __ClearPageLRU release_pages free_pages_and_swap_cache tlb_flush_mmu tlb_remove_page zap_pte_range Does that seem right? In this case, tlb_remove_page() is called right after page_remove_rmap() which ultimately results in clearing the PageAnon bit. Chris -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>