From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Thomas Gleixner <tglx@linutronix.de>,
Rik van Riel <riel@redhat.com>, Ingo Molnar <mingo@elte.hu>,
akpm@linux-foundation.org,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
David Miller <davem@davemloft.net>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Mel Gorman <mel@csn.ul.ie>, Nick Piggin <npiggin@kernel.dk>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Russell King <rmk@arm.linux.org.uk>,
Chris Metcalf <cmetcalf@tilera.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: [RFC][PATCH 02/15] mm, sparc64: Dont use tlb_flush for external tlb flushes
Date: Mon, 07 Mar 2011 18:13:52 +0100 [thread overview]
Message-ID: <20110307172206.624713531@chello.nl> (raw)
In-Reply-To: <20110307171350.989666626@chello.nl>
[-- Attachment #1: sparc64-tlb_flush.patch --]
[-- Type: text/plain, Size: 2308 bytes --]
Both sparc64 and powerpc64 use tlb_flush() to flush their respective
hash-tables which is entirely different from what
flush_tlb_range()/flush_tlb_mm() would do.
Powerpc64 already uses arch_*_lazy_mmu_mode() to batch and flush these
so any tlb_flush() caller should already find an empty batch, make
sparc64 do the same.
This ensures all platforms now have a tlb_flush() implementation that
is either flush_tlb_mm() or flush_tlb_range().
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
arch/powerpc/mm/tlb_hash64.c | 10 ----------
arch/sparc/include/asm/tlb_64.h | 2 +-
arch/sparc/include/asm/tlbflush_64.h | 13 +++++++++++++
3 files changed, 14 insertions(+), 11 deletions(-)
Index: linux-2.6/arch/sparc/include/asm/tlbflush_64.h
===================================================================
--- linux-2.6.orig/arch/sparc/include/asm/tlbflush_64.h
+++ linux-2.6/arch/sparc/include/asm/tlbflush_64.h
@@ -26,6 +26,19 @@ extern void flush_tlb_pending(void);
#define flush_tlb_page(vma,addr) flush_tlb_pending()
#define flush_tlb_mm(mm) flush_tlb_pending()
+#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
+
+static inline void arch_enter_lazy_mmu_mode(void)
+{
+}
+
+static inline void arch_leave_lazy_mmu_mode(void)
+{
+ flush_tlb_pending();
+}
+
+#define arch_flush_lazy_mmu_mode() do {} while (0)
+
/* Local cpu only. */
extern void __flush_tlb_all(void);
Index: linux-2.6/arch/sparc/include/asm/tlb_64.h
===================================================================
--- linux-2.6.orig/arch/sparc/include/asm/tlb_64.h
+++ linux-2.6/arch/sparc/include/asm/tlb_64.h
@@ -25,7 +25,7 @@ extern void flush_tlb_pending(void);
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
-#define tlb_flush(tlb) flush_tlb_pending()
+#define tlb_flush(tlb) do { } while (0)
#include <asm-generic/tlb.h>
--
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next prev parent reply other threads:[~2011-03-07 17:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-07 17:13 [RFC][PATCH 00/15] Unify TLB gather implementations -v2 Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 01/15] mm, powerpc: Dont use tlb_flush for external tlb flushes Peter Zijlstra
2011-03-07 17:13 ` Peter Zijlstra [this message]
2011-03-07 17:13 ` [RFC][PATCH 03/15] mm, arch: Remove tlb_flush() Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 04/15] mm: Optimize fullmm TLB flushing Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 05/15] mm, tile: Change flush_tlb_range() VM_HUGETLB semantics Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 06/15] mm: Provide generic range tracking and flushing Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 07/15] mm, arm: Convert arm to generic tlb Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 08/15] mm, ia64: Convert ia64 " Peter Zijlstra
2011-03-07 17:13 ` [RFC][PATCH 09/15] mm, sh: Convert sh " Peter Zijlstra
2011-03-07 17:14 ` [RFC][PATCH 10/15] mm, um, Convert um " Peter Zijlstra
2011-03-07 17:14 ` [RFC][PATCH 11/15] mm, avr32: Convert avr32 " Peter Zijlstra
2011-03-07 17:14 ` [RFC][PATCH 12/15] mm, mips: Convert mips " Peter Zijlstra
2011-03-07 17:14 ` [RFC][PATCH 13/15] mm, parisc: Convert parisc " Peter Zijlstra
2011-03-07 17:14 ` [RFC][PATCH 14/15] mm, sparc32: Convert sparc32 " Peter Zijlstra
2011-03-07 17:54 ` Peter Zijlstra
2011-03-07 17:14 ` [RFC][PATCH 15/15] mm, xtensa: Convert xtensa " Peter Zijlstra
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