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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-07-27 01:24:12 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-27 02:19:19 +0300
commite77b0852b551ffd8b29fa0225e1ef62c195e3160 (patch)
treea9f49cde2ef4814f78423addd7af592c549a0403 /mm/memory.c
parente9d55e157034a9efd99405c99c1565d64619d82b (diff)
downloadlinux-e77b0852b551ffd8b29fa0225e1ef62c195e3160.tar.xz
mm/mmu_gather: track page size with mmu gather and force flush if page size change
This allows an arch which needs to do special handing with respect to different page size when flushing tlb to implement the same in mmu gather. Link: http://lkml.kernel.org/r/1465049193-22197-3-git-send-email-aneesh.kumar@linux.vnet.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Hugh Dickins <hughd@google.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
-rw-r--r--mm/memory.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 12f31501c323..a329149e1c54 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -233,6 +233,7 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long
#ifdef CONFIG_HAVE_RCU_TABLE_FREE
tlb->batch = NULL;
#endif
+ tlb->page_size = 0;
__tlb_reset_range(tlb);
}
@@ -294,12 +295,19 @@ void tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long e
* When out of page slots we must call tlb_flush_mmu().
*returns true if the caller should flush.
*/
-bool __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
+bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_size)
{
struct mmu_gather_batch *batch;
VM_BUG_ON(!tlb->end);
+ if (!tlb->page_size)
+ tlb->page_size = page_size;
+ else {
+ if (page_size != tlb->page_size)
+ return true;
+ }
+
batch = tlb->active;
if (batch->nr == batch->max) {
if (!tlb_next_batch(tlb))