The patch titled
Subject: LoongArch: enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
has been added to the -mm mm-unstable branch. Its filename is
loongarch-enable-arch_want_hugetlb_page_optimize_vmemmap.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/loongarch-enable-arch_want_hugetlb_page_optimize_vmemmap.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
Subject: LoongArch: enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
Date: Thu, 27 Oct 2022 20:52:53 +0800
The feature of minimizing overhead of struct page associated with each
HugeTLB page is implemented on x86_64. However, the infrastructure of
this feature is already there, so just select ARCH_WANT_HUGETLB_PAGE_
OPTIMIZE_VMEMMAP is enough to enable this feature for LoongArch.
Link: https://lkml.kernel.org/r/20221027125253.3458989-5-chenhuacai@xxxxxxxxxxx
Signed-off-by: Feiyang Chen <chenfeiyang@xxxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
Acked-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Cc: Min Zhou <zhoumin@xxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Xuefeng Li <lixuefeng@xxxxxxxxxxx>
Cc: Xuerui Wang <kernel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/loongarch/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/loongarch/Kconfig~loongarch-enable-arch_want_hugetlb_page_optimize_vmemmap
+++ a/arch/loongarch/Kconfig
@@ -52,6 +52,7 @@ config LOONGARCH
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+ select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
select ARCH_WANT_LD_ORPHAN_WARN
select ARCH_WANTS_NO_INSTR
select BUILDTIME_TABLE_SORT
_
Patches currently in -mm which might be from chenfeiyang@xxxxxxxxxxx are
mipsloongarchnios2-adjust-prototypes-of-pd_init.patch
loongarch-add-sparse-memory-vmemmap-support.patch
mm-sparse-vmemmap-generalise-vmemmap_populate_hugepages.patch
loongarch-enable-arch_want_hugetlb_page_optimize_vmemmap.patch
