From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: kernel-team@android.com, Will Deacon <will@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Peter Zijlstra <peterz@infradead.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Matt Fleming <matt@codeblueprint.co.uk>,
sparclinux@vger.kernel.org
Subject: [PATCH 4/4] sparc32: mm: Reduce allocation size for PMD and PTE tables
Date: Tue, 24 Mar 2020 10:40:05 +0000 [thread overview]
Message-ID: <20200324104005.11279-5-will@kernel.org> (raw)
In-Reply-To: <20200324104005.11279-1-will@kernel.org>
Now that the page table allocator can free page table allocations
smaller than PAGE_SIZE, reduce the size of the PMD and PTE allocations
to avoid needlessly wasting memory.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Will Deacon <will@kernel.org>
---
arch/sparc/include/asm/pgtsrmmu.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/include/asm/pgtsrmmu.h b/arch/sparc/include/asm/pgtsrmmu.h
index 58ea8e8c6ee7..7708d015712b 100644
--- a/arch/sparc/include/asm/pgtsrmmu.h
+++ b/arch/sparc/include/asm/pgtsrmmu.h
@@ -17,8 +17,8 @@
/* Number of contexts is implementation-dependent; 64k is the most we support */
#define SRMMU_MAX_CONTEXTS 65536
-#define SRMMU_PTE_TABLE_SIZE (PAGE_SIZE)
-#define SRMMU_PMD_TABLE_SIZE (PAGE_SIZE)
+#define SRMMU_PTE_TABLE_SIZE (PTRS_PER_PTE*4)
+#define SRMMU_PMD_TABLE_SIZE (PTRS_PER_PMD*4)
#define SRMMU_PGD_TABLE_SIZE (PTRS_PER_PGD*4)
/* Definition of the values in the ET field of PTD's and PTE's */
--
2.20.1
prev parent reply other threads:[~2020-03-24 10:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-24 10:40 [PATCH 0/4] Rework sparc32 page-table layout Will Deacon
2020-03-24 10:40 ` [PATCH 1/4] sparc32: mm: Fix argument checking in __srmmu_get_nocache() Will Deacon
2020-03-24 17:41 ` Nick Desaulniers
2020-03-24 17:41 ` Nick Desaulniers
2020-03-24 17:51 ` Will Deacon
2020-03-24 18:04 ` Nick Desaulniers
2020-03-24 18:04 ` Nick Desaulniers
2020-03-24 10:40 ` [PATCH 2/4] sparc32: mm: Restructure sparc32 MMU page-table layout Will Deacon
2020-03-24 10:40 ` Will Deacon
2020-03-24 10:40 ` [PATCH 3/4] sparc32: mm: Change pgtable_t type to pte_t * instead of struct page * Will Deacon
2020-03-24 10:40 ` Will Deacon
2020-03-24 10:40 ` Will Deacon [this message]
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