From: Naresh Kamboju <naresh.kamboju@linaro.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Joel Fernandes <joel@joelfernandes.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
William Kucharski <william.kucharski@oracle.com>,
linux- stable <stable@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>, Arnd Bergmann <arnd@arndb.de>,
Andrew Morton <akpm@linux-foundation.org>,
Roman Gushchin <guro@fb.com>, Michal Hocko <mhocko@kernel.org>,
lkft-triage@lists.linaro.org, Chris Down <chris@chrisdown.name>,
Michel Lespinasse <walken@google.com>,
Fan Yang <Fan_Yang@sjtu.edu.cn>,
Brian Geffon <bgeffon@google.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
pugaowei@gmail.com, Jerome Glisse <jglisse@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mel Gorman <mgorman@techsingularity.net>,
Hugh Dickins <hughd@google.com>,
Al Viro <viro@zeniv.linux.org.uk>, Tejun Heo <tj@kernel.org>,
Sasha Levin <sashal@kernel.org>
Subject: Re: WARNING: at mm/mremap.c:211 move_page_tables in i386
Date: Sat, 11 Jul 2020 22:57:38 +0530 [thread overview]
Message-ID: <CA+G9fYusSSrc5G_pZV6Lc-LjjkzQcc3EsLMo+ejSzvyRcMgbqw@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=whPrCRZpXYKois-0t8MibxH9KVXn=+-O1YVvOA016fqhw@mail.gmail.com>
On Sat, 11 Jul 2020 at 01:35, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Fri, Jul 10, 2020 at 10:48 AM Naresh Kamboju
> <naresh.kamboju@linaro.org> wrote:
I have started bisecting this problem and found the first bad commit
commit 9f132f7e145506efc0744426cb338b18a54afc3b
Author: Joel Fernandes (Google) <joel@joelfernandes.org>
Date: Thu Jan 3 15:28:41 2019 -0800
mm: select HAVE_MOVE_PMD on x86 for faster mremap
Moving page-tables at the PMD-level on x86 is known to be safe. Enable
this option so that we can do fast mremap when possible.
Link: http://lkml.kernel.org/r/20181108181201.88826-4-joelaf@google.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index e260460210e1..6185d4f33296 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -172,6 +172,7 @@ config X86
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MIXED_BREAKPOINTS_REGS
select HAVE_MOD_ARCH_SPECIFIC
+ select HAVE_MOVE_PMD
select HAVE_NMI
select HAVE_OPROFILE
select HAVE_OPTPROBES
After reverting the above patch the reported kernel warning got fixed on
Linus mainline tree 5.8.0-rc4.
--
Linaro LKFT
https://lkft.linaro.org
next prev parent reply other threads:[~2020-07-11 17:27 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 5:28 WARNING: at mm/mremap.c:211 move_page_tables in i386 Naresh Kamboju
2020-07-09 8:25 ` Arnd Bergmann
2020-07-10 4:17 ` Naresh Kamboju
2020-07-09 19:12 ` Linus Torvalds
2020-07-10 4:28 ` Naresh Kamboju
2020-07-10 5:22 ` Linus Torvalds
2020-07-10 17:48 ` Naresh Kamboju
2020-07-10 20:05 ` Linus Torvalds
2020-07-11 17:27 ` Naresh Kamboju [this message]
2020-07-11 18:12 ` Linus Torvalds
2020-07-11 18:21 ` Linus Torvalds
2020-07-11 23:33 ` Joel Fernandes
2020-07-12 17:30 ` Matthew Wilcox
2020-07-12 20:38 ` Linus Torvalds
2020-07-12 21:50 ` Joel Fernandes
2020-07-12 22:58 ` Linus Torvalds
2020-07-13 2:53 ` Joel Fernandes
2020-07-13 3:51 ` Linus Torvalds
2020-07-13 12:12 ` Joel Fernandes
2020-07-14 7:33 ` Kirill A. Shutemov
2020-07-14 11:27 ` Naresh Kamboju
2020-07-14 16:08 ` Joel Fernandes
2020-07-14 16:10 ` Linus Torvalds
2020-07-14 18:12 ` Joel Fernandes
2020-07-14 18:49 ` Linus Torvalds
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