The patch titled
Subject: powerpc/mm/radix: implement tlb mmu gather flush efficiently
has been added to the -mm tree. Its filename is
powerpc-mm-radix-implement-tlb-mmu-gather-flush-efficiently.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-mm-radix-implement-tlb-mmu-gather-flush-efficiently.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-mm-radix-implement-tlb-mmu-gather-flush-efficiently.patch
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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Subject: powerpc/mm/radix: implement tlb mmu gather flush efficiently
Now that we track page size in mmu_gather, we can use address based tlbie
format when doing a tlb_flush(). We don't do this if we are invalidating
the full address space.
Link: http://lkml.kernel.org/r/1464860389-29019-4-git-send-email-aneesh.kumar@xxxxxxxxxxxxxxxxxx
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/tlb-radix.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff -puN arch/powerpc/mm/tlb-radix.c~powerpc-mm-radix-implement-tlb-mmu-gather-flush-efficiently arch/powerpc/mm/tlb-radix.c
--- a/arch/powerpc/mm/tlb-radix.c~powerpc-mm-radix-implement-tlb-mmu-gather-flush-efficiently
+++ a/arch/powerpc/mm/tlb-radix.c
@@ -243,9 +243,35 @@ void radix__flush_tlb_range(struct vm_ar
}
EXPORT_SYMBOL(radix__flush_tlb_range);
+static int radix_get_mmu_psize(int page_size)
+{
+ int psize;
+
+ if (page_size == (1UL << mmu_psize_defs[mmu_virtual_psize].shift))
+ psize = mmu_virtual_psize;
+ else if (page_size == (1UL << mmu_psize_defs[MMU_PAGE_2M].shift))
+ psize = MMU_PAGE_2M;
+ else if (page_size == (1UL << mmu_psize_defs[MMU_PAGE_1G].shift))
+ psize = MMU_PAGE_1G;
+ else
+ return -1;
+ return psize;
+}
void radix__tlb_flush(struct mmu_gather *tlb)
{
+ int psize = 0;
struct mm_struct *mm = tlb->mm;
- radix__flush_tlb_mm(mm);
+ int page_size = tlb->page_size;
+
+ psize = radix_get_mmu_psize(page_size);
+ if (psize == -1)
+ /* unknown page size */
+ goto flush_mm;
+
+ if (!tlb->fullmm && !tlb->need_flush_all)
+ radix__flush_tlb_range_psize(mm, tlb->start, tlb->end, psize);
+ else
+flush_mm:
+ radix__flush_tlb_mm(mm);
}
_
Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxxxxxxx are
mm-debug-add-vm_warn-which-maps-to-warn.patch
powerpc-mm-check-for-irq-disabled-only-if-debug_vm-is-enabled.patch
mm-hugetlb-simplify-hugetlb-unmap.patch
mm-change-the-interface-for-__tlb_remove_page.patch
mm-mmu_gather-track-page-size-with-mmu-gather-and-force-flush-if-page-size-change.patch
powerpc-mm-radix-implement-tlb-mmu-gather-flush-efficiently.patch
a.patch
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