From: Xie Yisheng <xieyisheng1@huawei.com>
To: akpm@linux-foundation.org, mhocko@kernel.org
Cc: guohanjun@huawei.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, will.deacon@arm.com,
mhocko@suse.com, dave.hansen@intel.com, sudeep.holla@arm.com,
catalin.marinas@arm.com, mark.rutland@arm.com,
robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org,
mike.kravetz@oracle.com, n-horiguchi@ah.jp.nec.com
Subject: [RFC PATCH v3 0/2] arm64/hugetlb: enable gigantic page
Date: Mon, 22 Aug 2016 21:20:02 +0800 [thread overview]
Message-ID: <1471872004-59365-1-git-send-email-xieyisheng1@huawei.com> (raw)
Arm64 supports different size of gigantic page which can be seen from:
commit 084bd29810a5 ("ARM64: mm: HugeTLB support.")
commit 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit")
So I tried to use this function by adding hugepagesz=1G in kernel
parameters, with CONFIG_CMA=y. However, when I
echo xx > \
/sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages
it failed with the following info:
-bash: echo: write error: Invalid argument
This is a v3 patchset which make gigantic page can be
allocated and freed at runtime for arch arm64,
with CONFIG_CMA=y or other related configs is enabled.
You can see the former discussions at:
https://lkml.org/lkml/2016/8/18/310
https://lkml.org/lkml/2016/8/21/410
Xie Yisheng (2):
mm/hugetlb: Introduce ARCH_HAS_GIGANTIC_PAGE
arm64 Kconfig: Select gigantic page
arch/arm64/Kconfig | 1 +
arch/s390/Kconfig | 1 +
arch/x86/Kconfig | 1 +
fs/Kconfig | 3 ++++
mm/hugetlb.c | 2 +-
5 files changed, 7 insertions(+), 1 deletion(-)
--
1.7.12.4
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next reply other threads:[~2016-08-22 13:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 13:20 Xie Yisheng [this message]
2016-08-22 13:20 ` [RFC PATCH v3 1/2] mm/hugetlb: Introduce ARCH_HAS_GIGANTIC_PAGE Xie Yisheng
2016-08-22 13:44 ` Michal Hocko
2016-09-08 9:55 ` Naoya Horiguchi
2016-08-22 13:20 ` [RFC PATCH v3 2/2] arm64 Kconfig: Select gigantic page Xie Yisheng
2016-08-26 10:26 ` [RFC PATCH v3 0/2] arm64/hugetlb: enable " Will Deacon
2016-08-27 9:45 ` Yisheng Xie
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