From: "tip-bot2 for Kirill A. Shutemov" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@surriel.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-mm@kvack.org, Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [tip: x86/mm] x86/mm: Enable 5-level paging support by default
Date: Mon, 16 Sep 2019 14:54:54 -0000 [thread overview]
Message-ID: <156864569401.24167.16824438993576938124.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20190913095452.40592-1-kirill.shutemov@linux.intel.com>
The following commit has been merged into the x86/mm branch of tip:
Commit-ID: 18ec1eaf58fbf2d9009a752a102a3d8e0d905a0f
Gitweb: https://git.kernel.org/tip/18ec1eaf58fbf2d9009a752a102a3d8e0d905a0f
Author: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
AuthorDate: Fri, 13 Sep 2019 12:54:52 +03:00
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Mon, 16 Sep 2019 16:51:20 +02:00
x86/mm: Enable 5-level paging support by default
Support of boot-time switching between 4- and 5-level paging mode is
upstream since 4.17.
We run internal testing with 5-level paging support enabled for a while
and it doesn't not cause any functional or performance regression on
4-level paging hardware.
The only 5-level paging related regressions I saw were in early boot
code that runs independently from CONFIG_X86_5LEVEL.
The next major release of distributions expected to have
CONFIG_X86_5LEVEL=y.
Enable the option by default. It may help to catch obscure bugs early.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: https://lkml.kernel.org/r/20190913095452.40592-1-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 58eae28..d4bbebe 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1483,6 +1483,7 @@ config X86_PAE
config X86_5LEVEL
bool "Enable 5-level page tables support"
+ default y
select DYNAMIC_MEMORY_LAYOUT
select SPARSEMEM_VMEMMAP
depends on X86_64
prev parent reply other threads:[~2019-09-16 14:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-13 9:54 [PATCH] " Kirill A. Shutemov
2019-09-13 18:20 ` Dave Hansen
2019-09-16 14:53 ` Ingo Molnar
2019-09-16 14:54 ` tip-bot2 for Kirill A. Shutemov [this message]
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