linux-kernel - [tip:x86/mm] x86/Kconfig: Make SPARSEMEM default for 32-bit x86

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Message-ID: <tip-6ad57f7f2cbf65daced27f023cc99360742a24b9@git.kernel.org>
Date:   Thu, 25 Apr 2019 00:32:41 -0700
From:   tip-bot for Mike Rapoport <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     luto@...nel.org, hch@...radead.org, mgorman@...hsingularity.net,
        linux-kernel@...r.kernel.org, mingo@...nel.org, bp@...en8.de,
        peterz@...radead.org, rppt@...ux.ibm.com,
        dave.hansen@...ux.intel.com, willy@...radead.org,
        tglx@...utronix.de, riel@...riel.com,
        torvalds@...ux-foundation.org, hpa@...or.com
Subject: [tip:x86/mm] x86/Kconfig: Make SPARSEMEM default for 32-bit x86

Commit-ID:  6ad57f7f2cbf65daced27f023cc99360742a24b9
Gitweb:     https://git.kernel.org/tip/6ad57f7f2cbf65daced27f023cc99360742a24b9
Author:     Mike Rapoport <rppt@...ux.ibm.com>
AuthorDate: Wed, 24 Apr 2019 16:24:11 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 25 Apr 2019 09:02:17 +0200

x86/Kconfig: Make SPARSEMEM default for 32-bit x86

Sparsemem has been a default memory model for x86-64 for over a decade,
since:

  b263295dbffd ("x86: 64-bit, make sparsemem vmemmap the only memory model").

Make it the default for 32-bit NUMA systems (if there any left) as well.

Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
Acked-by: Mel Gorman <mgorman@...hsingularity.net>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...riel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-mm@...ck.org
Link: http://lkml.kernel.org/r/1556112252-9339-2-git-send-email-rppt@linux.ibm.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/Kconfig | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5ad92419be19..0b91756ed980 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1609,10 +1609,6 @@ config ARCH_DISCONTIGMEM_ENABLE
 	def_bool y
 	depends on NUMA && X86_32
 
-config ARCH_DISCONTIGMEM_DEFAULT
-	def_bool y
-	depends on NUMA && X86_32
-
 config ARCH_SPARSEMEM_ENABLE
 	def_bool y
 	depends on X86_64 || NUMA || X86_32 || X86_32_NON_STANDARD
@@ -1620,8 +1616,7 @@ config ARCH_SPARSEMEM_ENABLE
 	select SPARSEMEM_VMEMMAP_ENABLE if X86_64
 
 config ARCH_SPARSEMEM_DEFAULT
-	def_bool y
-	depends on X86_64
+	def_bool X86_64 || (NUMA && X86_32)
 
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y