From e9d55e157034a9efd99405c99c1565d64619d82b Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Tue, 26 Jul 2016 15:24:09 -0700 Subject: mm: change the interface for __tlb_remove_page() This updates the generic and arch specific implementation to return true if we need to do a tlb flush. That means if a __tlb_remove_page indicate a flush is needed, the page we try to remove need to be tracked and added again after the flush. We need to track it because we have already update the pte to none and we can't just loop back. This change is done to enable us to do a tlb_flush when we try to flush a range that consists of different page sizes. For architectures like ppc64, we can do a range based tlb flush and we need to track page size for that. When we try to remove a huge page, we will force a tlb flush and starts a new mmu gather. [aneesh.kumar@linux.vnet.ibm.com: mm-change-the-interface-for-__tlb_remove_page-v3] Link: http://lkml.kernel.org/r/1465049193-22197-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/1464860389-29019-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com Signed-off-by: Aneesh Kumar K.V Cc: Benjamin Herrenschmidt Cc: Michael Ellerman Cc: Hugh Dickins Cc: "Kirill A. Shutemov" Cc: Andrea Arcangeli Cc: Joonsoo Kim Cc: Mel Gorman Cc: David Rientjes Cc: Vlastimil Babka Cc: Minchan Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/include/asm/tlb.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'arch/um') diff --git a/arch/um/include/asm/tlb.h b/arch/um/include/asm/tlb.h index 16eb63fac57d..3dc4cbb3c2c0 100644 --- a/arch/um/include/asm/tlb.h +++ b/arch/um/include/asm/tlb.h @@ -102,7 +102,7 @@ static inline int __tlb_remove_page(struct mmu_gather *tlb, struct page *page) { tlb->need_flush = 1; free_page_and_swap_cache(page); - return 1; /* avoid calling tlb_flush_mmu */ + return false; /* avoid calling tlb_flush_mmu */ } static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page) @@ -110,6 +110,12 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page) __tlb_remove_page(tlb, page); } +static inline bool __tlb_remove_pte_page(struct mmu_gather *tlb, + struct page *page) +{ + return __tlb_remove_page(tlb, page); +} + /** * tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation. * -- cgit v1.2.3-58-ga151