Subject: [merged] x86-mm-enable-split-page-table-lock-for-pmd-level.patch removed from -mm tree
To: kirill.shutemov@xxxxxxxxxxxxxxx,aarcange@xxxxxxxxxx,ak@xxxxxxxxxxxxxxx,athorlton@xxxxxxx,dave.hansen@xxxxxxxxx,davej@xxxxxxxxxx,dhowells@xxxxxxxxxx,ebiederm@xxxxxxxxxxxx,fweisbec@xxxxxxxxx,hannes@xxxxxxxxxxx,hughd@xxxxxxxxxx,keescook@xxxxxxxxxxxx,mgorman@xxxxxxx,mingo@xxxxxxxxxx,mtk.manpages@xxxxxxxxx,n-horiguchi@xxxxxxxxxxxxx,oleg@xxxxxxxxxx,paulmck@xxxxxxxxxxxxxxxxxx,peterz@xxxxxxxxxxxxx,riel@xxxxxxxxxx,robinmholt@xxxxxxxxx,rostedt@xxxxxxxxxxx,sedat.dilek@xxxxxxxxx,srikar@xxxxxxxxxxxxxxxxxx,tglx@xxxxxxxxxxxxx,viro@xxxxxxxxxxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 15 Nov 2013 12:07:37 -0800
The patch titled
Subject: x86, mm: enable split page table lock for PMD level
has been removed from the -mm tree. Its filename was
x86-mm-enable-split-page-table-lock-for-pmd-level.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: x86, mm: enable split page table lock for PMD level
Enable PMD split page table lock for X86_64 and PAE.
[akpm@xxxxxxxxxxxxxxxxxxxx: coding-style fixes]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Tested-by: Alex Thorlton <athorlton@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: "Eric W . Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: "Paul E . McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Robin Holt <robinmholt@xxxxxxxxx>
Cc: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Reviewed-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/Kconfig | 4 ++++
arch/x86/include/asm/pgalloc.h | 11 ++++++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff -puN arch/x86/Kconfig~x86-mm-enable-split-page-table-lock-for-pmd-level arch/x86/Kconfig
--- a/arch/x86/Kconfig~x86-mm-enable-split-page-table-lock-for-pmd-level
+++ a/arch/x86/Kconfig
@@ -1885,6 +1885,10 @@ config USE_PERCPU_NUMA_NODE_ID
def_bool y
depends on NUMA
+config ARCH_ENABLE_SPLIT_PMD_PTLOCK
+ def_bool y
+ depends on X86_64 || X86_PAE
+
menu "Power management and ACPI options"
config ARCH_HIBERNATION_HEADER
diff -puN arch/x86/include/asm/pgalloc.h~x86-mm-enable-split-page-table-lock-for-pmd-level arch/x86/include/asm/pgalloc.h
--- a/arch/x86/include/asm/pgalloc.h~x86-mm-enable-split-page-table-lock-for-pmd-level
+++ a/arch/x86/include/asm/pgalloc.h
@@ -80,12 +80,21 @@ static inline void pmd_populate(struct m
#if PAGETABLE_LEVELS > 2
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
- return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
+ struct page *page;
+ page = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0);
+ if (!page)
+ return NULL;
+ if (!pgtable_pmd_page_ctor(page)) {
+ __free_pages(page, 0);
+ return NULL;
+ }
+ return (pmd_t *)page_address(page);
}
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
+ pgtable_pmd_page_dtor(virt_to_page(pmd));
free_page((unsigned long)pmd);
}
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
origin.patch
x86-mm-get-aslr-work-for-hugetlb-mappings.patch
mm-drop-actor-argument-of-do_generic_file_read-fix.patch
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