linux-kernel - [PATCH, RFC 1/2] Add config option to enable FS/DAX PMD sharing

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Message-Id: <1557417933-15701-2-git-send-email-larry.bassel@oracle.com>
Date:   Thu,  9 May 2019 09:05:32 -0700
From:   Larry Bassel <larry.bassel@...cle.com>
To:     mike.kravetz@...cle.com, willy@...radead.org,
        dan.j.williams@...el.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org
Cc:     Larry Bassel <larry.bassel@...cle.com>
Subject: [PATCH, RFC 1/2] Add config option to enable FS/DAX PMD sharing

If enabled, sharing of FS/DAX PMDs will be attempted.

Signed-off-by: Larry Bassel <larry.bassel@...cle.com>
---
 arch/x86/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e721273..e11702e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -297,6 +297,9 @@ config ARCH_SUSPEND_POSSIBLE
 config ARCH_WANT_HUGE_PMD_SHARE
 	def_bool y
 
+config MAY_SHARE_FSDAX_PMD
+	def_bool y
+
 config ARCH_WANT_GENERAL_HUGETLB
 	def_bool y
 
-- 
1.8.3.1