58 lines
2.4 KiB
Diff
58 lines
2.4 KiB
Diff
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From 81bbd23ad0649bfd381eaeecbd58c2c43ba08122 Mon Sep 17 00:00:00 2001
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From: Wang Qing <wangqing-hf@loongson.cn>
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Date: Thu, 14 Sep 2017 20:51:10 +0800
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Subject: [PATCH] Set kernal page size to 16K on loongson(MIPS) archtecture.
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This patch is specail used for mips64.
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---
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base/allocator/partition_allocator/page_allocator.h | 7 +++++++
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base/allocator/partition_allocator/partition_alloc.h | 5 +++++
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2 files changed, 12 insertions(+)
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diff --git a/base/allocator/partition_allocator/page_allocator.h b/base/allocator/partition_allocator/page_allocator.h
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index f57beb7..0ef1705 100644
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--- a/base/allocator/partition_allocator/page_allocator.h
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+++ b/base/allocator/partition_allocator/page_allocator.h
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@@ -17,6 +17,8 @@ namespace base {
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#if defined(OS_WIN)
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static const size_t kPageAllocationGranularityShift = 16; // 64KB
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+#elif __mips__
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+static const size_t kPageAllocationGranularityShift = 14; // 64KB
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#else
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static const size_t kPageAllocationGranularityShift = 12; // 4KB
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#endif
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@@ -29,7 +31,12 @@ static const size_t kPageAllocationGranularityBaseMask =
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// All Blink-supported systems have 4096 sized system pages and can handle
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// permissions and commit / decommit at this granularity.
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+// But, on mips have 16384 sized system pages.
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+#ifdef __mips__
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+static const size_t kSystemPageSize = 16384;
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+#else
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static const size_t kSystemPageSize = 4096;
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+#endif
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static const size_t kSystemPageOffsetMask = kSystemPageSize - 1;
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static const size_t kSystemPageBaseMask = ~kSystemPageOffsetMask;
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diff --git a/base/allocator/partition_allocator/partition_alloc.h b/base/allocator/partition_allocator/partition_alloc.h
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index c720a50..67c3598 100644
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--- a/base/allocator/partition_allocator/partition_alloc.h
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+++ b/base/allocator/partition_allocator/partition_alloc.h
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@@ -94,7 +94,12 @@ static const size_t kBucketShift = (kAllocationGranularity == 8) ? 3 : 2;
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// system page of the span. For our current max slot span size of 64k and other
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// constant values, we pack _all_ PartitionAllocGeneric() sizes perfectly up
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// against the end of a system page.
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+// On mips have 16KB pagesize, So kPartitionPageSize is 64KB.
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+#ifdef __mips__
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+static const size_t kPartitionPageShift = 16; // 64KB
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+#else
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static const size_t kPartitionPageShift = 14; // 16KB
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+#endif
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static const size_t kPartitionPageSize = 1 << kPartitionPageShift;
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static const size_t kPartitionPageOffsetMask = kPartitionPageSize - 1;
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static const size_t kPartitionPageBaseMask = ~kPartitionPageOffsetMask;
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--
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2.1.0
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