From: Andrea Arcangeli <aarcange@redhat.com>
To: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>,
Izik Eidus <ieidus@redhat.com>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Nick Piggin <npiggin@suse.de>, Rik van Riel <riel@redhat.com>,
Mel Gorman <mel@csn.ul.ie>, Dave Hansen <dave@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ingo Molnar <mingo@elte.hu>, Mike Travis <travis@sgi.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Christoph Lameter <cl@linux-foundation.org>,
Chris Wright <chrisw@sous-sol.org>,
bpicco@redhat.com,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Arnd Bergmann <arnd@arndb.de>,
"Michael S. Tsirkin" <mst@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: [PATCH 37 of 41] add x86 32bit support
Date: Fri, 26 Mar 2010 18:00:41 +0100 [thread overview]
Message-ID: <2a644b64b34162f323c5.1269622841@v2.random> (raw)
In-Reply-To: <patchbomb.1269622804@v2.random>
From: Andrea Arcangeli <aarcange@redhat.com>
Add support for transparent hugepages to x86 32bit.
Share the same VM_ bitflag for VM_MAPPED_COPY. mm/nommu.c will never support
transparent hugepages.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
---
diff --git a/arch/x86/include/asm/pgtable-2level.h b/arch/x86/include/asm/pgtable-2level.h
--- a/arch/x86/include/asm/pgtable-2level.h
+++ b/arch/x86/include/asm/pgtable-2level.h
@@ -46,6 +46,15 @@ static inline pte_t native_ptep_get_and_
#define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
#endif
+#ifdef CONFIG_SMP
+static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
+{
+ return __pmd(xchg((pmdval_t *)xp, 0));
+}
+#else
+#define native_pmdp_get_and_clear(xp) native_local_pmdp_get_and_clear(xp)
+#endif
+
/*
* Bits _PAGE_BIT_PRESENT, _PAGE_BIT_FILE and _PAGE_BIT_PROTNONE are taken,
* split up the 29 bits of offset into this range:
diff --git a/arch/x86/include/asm/pgtable-3level.h b/arch/x86/include/asm/pgtable-3level.h
--- a/arch/x86/include/asm/pgtable-3level.h
+++ b/arch/x86/include/asm/pgtable-3level.h
@@ -104,6 +104,29 @@ static inline pte_t native_ptep_get_and_
#define native_ptep_get_and_clear(xp) native_local_ptep_get_and_clear(xp)
#endif
+#ifdef CONFIG_SMP
+union split_pmd {
+ struct {
+ u32 pmd_low;
+ u32 pmd_high;
+ };
+ pmd_t pmd;
+};
+static inline pmd_t native_pmdp_get_and_clear(pmd_t *pmdp)
+{
+ union split_pmd res, *orig = (union pmd_parts *)pmdp;
+
+ /* xchg acts as a barrier before setting of the high bits */
+ res.pmd_low = xchg(&orig->pmd_low, 0);
+ res.pmd_high = orig->pmd_high;
+ orig->pmd_high = 0;
+
+ return res.pmd;
+}
+#else
+#define native_pmdp_get_and_clear(xp) native_local_pmdp_get_and_clear(xp)
+#endif
+
/*
* Bits 0, 6 and 7 are taken in the low part of the pte,
* put the 32 bits of offset into the high part.
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -95,6 +95,11 @@ static inline int pte_young(pte_t pte)
return pte_flags(pte) & _PAGE_ACCESSED;
}
+static inline int pmd_young(pmd_t pmd)
+{
+ return pmd_flags(pmd) & _PAGE_ACCESSED;
+}
+
static inline int pte_write(pte_t pte)
{
return pte_flags(pte) & _PAGE_RW;
@@ -143,6 +148,18 @@ static inline int pmd_large(pmd_t pte)
(_PAGE_PSE | _PAGE_PRESENT);
}
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static inline int pmd_trans_splitting(pmd_t pmd)
+{
+ return pmd_val(pmd) & _PAGE_SPLITTING;
+}
+
+static inline int pmd_trans_huge(pmd_t pmd)
+{
+ return pmd_val(pmd) & _PAGE_PSE;
+}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
{
pteval_t v = native_pte_val(pte);
@@ -217,6 +234,55 @@ static inline pte_t pte_mkspecial(pte_t
return pte_set_flags(pte, _PAGE_SPECIAL);
}
+static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
+{
+ pmdval_t v = native_pmd_val(pmd);
+
+ return __pmd(v | set);
+}
+
+static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
+{
+ pmdval_t v = native_pmd_val(pmd);
+
+ return __pmd(v & ~clear);
+}
+
+static inline pmd_t pmd_mkold(pmd_t pmd)
+{
+ return pmd_clear_flags(pmd, _PAGE_ACCESSED);
+}
+
+static inline pmd_t pmd_wrprotect(pmd_t pmd)
+{
+ return pmd_clear_flags(pmd, _PAGE_RW);
+}
+
+static inline pmd_t pmd_mkdirty(pmd_t pmd)
+{
+ return pmd_set_flags(pmd, _PAGE_DIRTY);
+}
+
+static inline pmd_t pmd_mkhuge(pmd_t pmd)
+{
+ return pmd_set_flags(pmd, _PAGE_PSE);
+}
+
+static inline pmd_t pmd_mkyoung(pmd_t pmd)
+{
+ return pmd_set_flags(pmd, _PAGE_ACCESSED);
+}
+
+static inline pmd_t pmd_mkwrite(pmd_t pmd)
+{
+ return pmd_set_flags(pmd, _PAGE_RW);
+}
+
+static inline pmd_t pmd_mknotpresent(pmd_t pmd)
+{
+ return pmd_clear_flags(pmd, _PAGE_PRESENT);
+}
+
/*
* Mask out unsupported bits in a present pgprot. Non-present pgprots
* can use those bits for other purposes, so leave them be.
@@ -525,6 +591,14 @@ static inline pte_t native_local_ptep_ge
return res;
}
+static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp)
+{
+ pmd_t res = *pmdp;
+
+ native_pmd_clear(pmdp);
+ return res;
+}
+
static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep , pte_t pte)
{
@@ -612,6 +686,49 @@ static inline void ptep_set_wrprotect(st
pte_update(mm, addr, ptep);
}
+#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
+
+#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
+extern int pmdp_set_access_flags(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp,
+ pmd_t entry, int dirty);
+
+#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
+extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
+ unsigned long addr, pmd_t *pmdp);
+
+#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
+extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp);
+
+
+#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
+extern void pmdp_splitting_flush(struct vm_area_struct *vma,
+ unsigned long addr, pmd_t *pmdp);
+
+#define __HAVE_ARCH_PMD_WRITE
+static inline int pmd_write(pmd_t pmd)
+{
+ return pmd_flags(pmd) & _PAGE_RW;
+}
+
+#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
+static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp)
+{
+ pmd_t pmd = native_pmdp_get_and_clear(pmdp);
+ pmd_update(mm, addr, pmdp);
+ return pmd;
+}
+
+#define __HAVE_ARCH_PMDP_SET_WRPROTECT
+static inline void pmdp_set_wrprotect(struct mm_struct *mm,
+ unsigned long addr, pmd_t *pmdp)
+{
+ clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp);
+ pmd_update(mm, addr, pmdp);
+}
+
/*
* clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
*
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -182,115 +182,6 @@ extern void cleanup_highmap(void);
#define __HAVE_ARCH_PTE_SAME
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static inline int pmd_trans_splitting(pmd_t pmd)
-{
- return pmd_val(pmd) & _PAGE_SPLITTING;
-}
-
-static inline int pmd_trans_huge(pmd_t pmd)
-{
- return pmd_val(pmd) & _PAGE_PSE;
-}
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-
-#define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot))
-
-#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
-extern int pmdp_set_access_flags(struct vm_area_struct *vma,
- unsigned long address, pmd_t *pmdp,
- pmd_t entry, int dirty);
-
-#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
-extern int pmdp_test_and_clear_young(struct vm_area_struct *vma,
- unsigned long addr, pmd_t *pmdp);
-
-#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
-extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
- unsigned long address, pmd_t *pmdp);
-
-
-#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
-extern void pmdp_splitting_flush(struct vm_area_struct *vma,
- unsigned long addr, pmd_t *pmdp);
-
-#define __HAVE_ARCH_PMD_WRITE
-static inline int pmd_write(pmd_t pmd)
-{
- return pmd_flags(pmd) & _PAGE_RW;
-}
-
-#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
-static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr,
- pmd_t *pmdp)
-{
- pmd_t pmd = native_pmdp_get_and_clear(pmdp);
- pmd_update(mm, addr, pmdp);
- return pmd;
-}
-
-#define __HAVE_ARCH_PMDP_SET_WRPROTECT
-static inline void pmdp_set_wrprotect(struct mm_struct *mm,
- unsigned long addr, pmd_t *pmdp)
-{
- clear_bit(_PAGE_BIT_RW, (unsigned long *)&pmdp->pmd);
- pmd_update(mm, addr, pmdp);
-}
-
-static inline int pmd_young(pmd_t pmd)
-{
- return pmd_flags(pmd) & _PAGE_ACCESSED;
-}
-
-static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
-{
- pmdval_t v = native_pmd_val(pmd);
-
- return native_make_pmd(v | set);
-}
-
-static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear)
-{
- pmdval_t v = native_pmd_val(pmd);
-
- return native_make_pmd(v & ~clear);
-}
-
-static inline pmd_t pmd_mkold(pmd_t pmd)
-{
- return pmd_clear_flags(pmd, _PAGE_ACCESSED);
-}
-
-static inline pmd_t pmd_wrprotect(pmd_t pmd)
-{
- return pmd_clear_flags(pmd, _PAGE_RW);
-}
-
-static inline pmd_t pmd_mkdirty(pmd_t pmd)
-{
- return pmd_set_flags(pmd, _PAGE_DIRTY);
-}
-
-static inline pmd_t pmd_mkhuge(pmd_t pmd)
-{
- return pmd_set_flags(pmd, _PAGE_PSE);
-}
-
-static inline pmd_t pmd_mkyoung(pmd_t pmd)
-{
- return pmd_set_flags(pmd, _PAGE_ACCESSED);
-}
-
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
-{
- return pmd_set_flags(pmd, _PAGE_RW);
-}
-
-static inline pmd_t pmd_mknotpresent(pmd_t pmd)
-{
- return pmd_clear_flags(pmd, _PAGE_PRESENT);
-}
-
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PGTABLE_64_H */
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -351,7 +351,7 @@ int pmdp_test_and_clear_young(struct vm_
if (pmd_young(*pmdp))
ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
- (unsigned long *) &pmdp->pmd);
+ (unsigned long *)pmdp);
if (ret)
pmd_update(vma->vm_mm, addr, pmdp);
@@ -393,7 +393,7 @@ void pmdp_splitting_flush(struct vm_area
int set;
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
set = !test_and_set_bit(_PAGE_BIT_SPLITTING,
- (unsigned long *)&pmdp->pmd);
+ (unsigned long *)pmdp);
if (set) {
pmd_update(vma->vm_mm, address, pmdp);
/* need tlb flush only to serialize against gup-fast */
diff --git a/include/linux/mm.h b/include/linux/mm.h
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -98,7 +98,11 @@ extern unsigned int kobjsize(const void
#define VM_NORESERVE 0x00200000 /* should the VM suppress accounting */
#define VM_HUGETLB 0x00400000 /* Huge TLB Page VM */
#define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */
+#ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define VM_MAPPED_COPY 0x01000000 /* T if mapped copy of data (nommu mmap) */
+#else
+#define VM_HUGEPAGE 0x01000000 /* MADV_HUGEPAGE marked this vma */
+#endif
#define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */
#define VM_ALWAYSDUMP 0x04000000 /* Always include in core dumps */
@@ -107,9 +111,6 @@ extern unsigned int kobjsize(const void
#define VM_SAO 0x20000000 /* Strong Access Ordering (powerpc) */
#define VM_PFN_AT_MMAP 0x40000000 /* PFNMAP vma that is fully mapped at mmap time */
#define VM_MERGEABLE 0x80000000 /* KSM may merge identical pages */
-#if BITS_PER_LONG > 32
-#define VM_HUGEPAGE 0x100000000UL /* MADV_HUGEPAGE marked this vma */
-#endif
#ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */
#define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
diff --git a/mm/Kconfig b/mm/Kconfig
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -290,7 +290,7 @@ config NOMMU_INITIAL_TRIM_EXCESS
config TRANSPARENT_HUGEPAGE
bool "Transparent Hugepage support" if EMBEDDED
- depends on X86_64
+ depends on X86
default y
help
Transparent Hugepages allows the kernel to use huge pages and
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next prev parent reply other threads:[~2010-03-26 17:13 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-26 17:00 [PATCH 00 of 41] Transparent Hugepage Support #15 Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 01 of 41] define MADV_HUGEPAGE Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 02 of 41] compound_lock Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 03 of 41] alter compound get_page/put_page Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 04 of 41] update futex compound knowledge Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 05 of 41] fix bad_page to show the real reason the page is bad Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 06 of 41] clear compound mapping Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 07 of 41] add native_set_pmd_at Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 08 of 41] add pmd paravirt ops Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 09 of 41] no paravirt version of pmd ops Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 10 of 41] export maybe_mkwrite Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 11 of 41] comment reminder in destroy_compound_page Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 12 of 41] config_transparent_hugepage Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 13 of 41] special pmd_trans_* functions Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 14 of 41] add pmd mangling generic functions Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 15 of 41] add pmd mangling functions to x86 Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 16 of 41] bail out gup_fast on splitting pmd Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 17 of 41] pte alloc trans splitting Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 18 of 41] add pmd mmu_notifier helpers Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 19 of 41] clear page compound Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 20 of 41] add pmd_huge_pte to mm_struct Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 21 of 41] split_huge_page_mm/vma Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 22 of 41] split_huge_page paging Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 23 of 41] clear_copy_huge_page Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 24 of 41] kvm mmu transparent hugepage support Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 25 of 41] _GFP_NO_KSWAPD Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 26 of 41] don't alloc harder for gfp nomemalloc even if nowait Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 27 of 41] transparent hugepage core Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 28 of 41] verify pmd_trans_huge isn't leaking Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 29 of 41] madvise(MADV_HUGEPAGE) Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 30 of 41] pmd_trans_huge migrate bugcheck Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 31 of 41] memcg compound Andrea Arcangeli
2010-03-29 1:57 ` Daisuke Nishimura
2010-03-29 18:23 ` Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 32 of 41] memcg huge memory Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 33 of 41] transparent hugepage vmstat Andrea Arcangeli
2010-03-29 2:13 ` Daisuke Nishimura
2010-03-29 18:21 ` Andrea Arcangeli
2010-03-30 0:40 ` Daisuke Nishimura
2010-03-26 17:00 ` [PATCH 34 of 41] khugepaged Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 35 of 41] don't leave orhpaned swap cache after ksm merging Andrea Arcangeli
2010-03-26 17:16 ` Rik van Riel
2010-03-26 17:23 ` Andrea Arcangeli
2010-03-26 21:32 ` Hugh Dickins
2010-03-27 1:08 ` Andrea Arcangeli
2010-03-29 14:01 ` Andrea Arcangeli
2010-03-30 6:56 ` Hugh Dickins
2010-04-01 16:47 ` Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 36 of 41] skip transhuge pages in ksm for now Andrea Arcangeli
2010-03-26 17:20 ` Rik van Riel
2010-03-26 17:00 ` Andrea Arcangeli [this message]
2010-03-26 17:45 ` [PATCH 37 of 41] add x86 32bit support Rik van Riel
2010-03-26 17:54 ` Johannes Weiner
2010-03-26 19:54 ` Andrea Arcangeli
2010-03-26 17:00 ` [PATCH 38 of 41] mincore transparent hugepage support Andrea Arcangeli
2010-03-26 18:13 ` Rik van Riel
2010-03-26 17:00 ` [PATCH 39 of 41] add pmd_modify Andrea Arcangeli
2010-03-26 18:24 ` Rik van Riel
2010-03-26 17:00 ` [PATCH 40 of 41] mprotect: pass vma down to page table walkers Andrea Arcangeli
2010-03-26 18:26 ` Rik van Riel
2010-03-26 17:00 ` [PATCH 41 of 41] mprotect: transparent huge page support Andrea Arcangeli
2010-03-26 18:27 ` Rik van Riel
2010-03-26 17:36 ` [PATCH 00 of 41] Transparent Hugepage Support #15 Mel Gorman
2010-03-26 18:07 ` Andrea Arcangeli
2010-03-26 21:09 ` Mel Gorman
2010-03-26 18:00 ` Christoph Lameter
2010-03-26 18:23 ` Andrea Arcangeli
2010-03-26 18:44 ` Christoph Lameter
2010-03-26 19:34 ` Andrea Arcangeli
2010-03-26 19:55 ` Christoph Lameter
-- strict thread matches above, loose matches on Subject: below --
2010-03-29 18:37 [PATCH 00 of 41] Transparent Hugepage Support #16 Andrea Arcangeli
2010-03-29 18:37 ` [PATCH 37 of 41] add x86 32bit support Andrea Arcangeli
2010-04-02 0:41 [PATCH 00 of 41] Transparent Hugepage Support #17 Andrea Arcangeli
2010-04-02 0:42 ` [PATCH 37 of 41] add x86 32bit support Andrea Arcangeli
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all data and code used by this external index.