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From: nkela@cisco.com (Nikunj Kela)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] arm64: add ARM64-specific support for flatmem
Date: Fri,  6 Jul 2018 10:02:15 -0700	[thread overview]
Message-ID: <20180706170215.56116-1-nkela@cisco.com> (raw)

Flatmem is useful in reducing kernel memory usage.
One usecase is in kdump kernel. We are able to save
~14M by moving to flatmem scheme.

Cc: xe-kernel at external.cisco.com
Cc: Nikunj Kela <nkela@cisco.com>
Signed-off-by: Nikunj Kela <nkela@cisco.com>
---
 arch/arm64/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 42c090c..96ab9a7 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -775,6 +775,10 @@ config ARCH_SPARSEMEM_DEFAULT
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool ARCH_SPARSEMEM_ENABLE
 
+config ARCH_FLATMEM_ENABLE
+	def_bool y
+	depends on !NUMA
+
 config HAVE_ARCH_PFN_VALID
 	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 
-- 
2.10.3.dirty

             reply	other threads:[~2018-07-06 17:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-06 17:02 Nikunj Kela [this message]
2018-07-06 17:06 ` [PATCH v2] arm64: add ARM64-specific support for flatmem Will Deacon
2018-07-06 17:16   ` Nikunj Kela (nkela)

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