The patch titled
Subject: sh: advertise gigantic page support
has been added to the -mm tree. Its filename is
sh-advertise-gigantic-page-support.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sh-advertise-gigantic-page-support.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sh-advertise-gigantic-page-support.patch
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------------------------------------------------------
From: Alexandre Ghiti <alex@xxxxxxxx>
Subject: sh: advertise gigantic page support
Patch series "Fix free/allocation of runtime gigantic pages", v8.
This series fixes sh and sparc that did not advertise their gigantic page
support and then were not able to allocate and free those pages at
runtime. It renames MEMORY_ISOLATION && COMPACTION || CMA condition into
the more accurate CONTIG_ALLOC, since it allows the definition of
alloc_contig_range function.
Finally, it then fixes the wrong definition of ARCH_HAS_GIGANTIC_PAGE
config that, without MEMORY_ISOLATION && COMPACTION || CMA defined, did
not allow architectures to free boottime allocated gigantic pages although
unrelated.
This patch (of 4):
sh actually supports gigantic pages and selecting ARCH_HAS_GIGANTIC_PAGE
allows it to allocate and free gigantic pages at runtime.
At least sdk7786_defconfig exposes such a configuration with huge pages of
64MB, pages of 4KB and MAX_ORDER = 11: HPAGE_SHIFT (26) - PAGE_SHIFT (12)
= 14 >= MAX_ORDER (11)
Link: http://lkml.kernel.org/r/20190327063626.18421-2-alex@xxxxxxxx
Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: "H . Peter Anvin" <hpa@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Andy Lutomirsky <luto@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sh/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/sh/Kconfig~sh-advertise-gigantic-page-support
+++ a/arch/sh/Kconfig
@@ -53,6 +53,7 @@ config SUPERH
select HAVE_FUTEX_CMPXCHG if FUTEX
select HAVE_NMI
select NEED_SG_DMA_LENGTH
+ select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
help
The SuperH is a RISC processor targeted for use in embedded systems
_
Patches currently in -mm which might be from alex@xxxxxxxx are
sh-advertise-gigantic-page-support.patch
sparc-advertise-gigantic-page-support.patch
mm-simplify-memory_isolation-compaction-cma-into-contig_alloc.patch
hugetlb-allow-to-free-gigantic-pages-regardless-of-the-configuration.patch
