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mm: rename USE_SPLIT_PTLOCKS to USE_SPLIT_PTE_PTLOCKS

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We're going to introduce split page table lock for PMD level.  Let's
rename existing split ptlock for PTE level to avoid confusion.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2013-11-14 14:30:45 -08:00 committed by Linus Torvalds
parent e9bb18c7b9
commit 57c1ffcefb
4 changed files with 13 additions and 13 deletions
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6
arch/arm/mm/fault-armv.c
View file

@ -65,7 +65,7 @@ static int do_adjust_pte(struct vm_area_struct *vma, unsigned long address,
return ret;
}
#if USE_SPLIT_PTLOCKS
#if USE_SPLIT_PTE_PTLOCKS
/*
* If we are using split PTE locks, then we need to take the page
* lock here. Otherwise we are using shared mm->page_table_lock
@ -84,10 +84,10 @@ static inline void do_pte_unlock(spinlock_t *ptl)
{
spin_unlock(ptl);
}
#else /* !USE_SPLIT_PTLOCKS */
#else /* !USE_SPLIT_PTE_PTLOCKS */
static inline void do_pte_lock(spinlock_t *ptl) {}
static inline void do_pte_unlock(spinlock_t *ptl) {}
#endif /* USE_SPLIT_PTLOCKS */
#endif /* USE_SPLIT_PTE_PTLOCKS */
static int adjust_pte(struct vm_area_struct *vma, unsigned long address,
unsigned long pfn)

6
arch/x86/xen/mmu.c
View file

@ -796,7 +796,7 @@ static spinlock_t *xen_pte_lock(struct page *page, struct mm_struct *mm)
{
spinlock_t *ptl = NULL;
#if USE_SPLIT_PTLOCKS
#if USE_SPLIT_PTE_PTLOCKS
ptl = __pte_lockptr(page);
spin_lock_nest_lock(ptl, &mm->page_table_lock);
#endif
@ -1637,7 +1637,7 @@ static inline void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn,
__set_pfn_prot(pfn, PAGE_KERNEL_RO);
if (level == PT_PTE && USE_SPLIT_PTLOCKS)
if (level == PT_PTE && USE_SPLIT_PTE_PTLOCKS)
__pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn);
xen_mc_issue(PARAVIRT_LAZY_MMU);
@ -1671,7 +1671,7 @@ static inline void xen_release_ptpage(unsigned long pfn, unsigned level)
if (!PageHighMem(page)) {
xen_mc_batch();
if (level == PT_PTE && USE_SPLIT_PTLOCKS)
if (level == PT_PTE && USE_SPLIT_PTE_PTLOCKS)
__pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);
__set_pfn_prot(pfn, PAGE_KERNEL);

6
include/linux/mm.h
View file

@ -1316,7 +1316,7 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
}
#endif /* CONFIG_MMU && !__ARCH_HAS_4LEVEL_HACK */
#if USE_SPLIT_PTLOCKS
#if USE_SPLIT_PTE_PTLOCKS
/*
* We tuck a spinlock to guard each pagetable page into its struct page,
* at page->private, with BUILD_BUG_ON to make sure that this will not
@ -1329,14 +1329,14 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
} while (0)
#define pte_lock_deinit(page) ((page)->mapping = NULL)
#define pte_lockptr(mm, pmd) ({(void)(mm); __pte_lockptr(pmd_page(*(pmd)));})
#else /* !USE_SPLIT_PTLOCKS */
#else /* !USE_SPLIT_PTE_PTLOCKS */
/*
* We use mm->page_table_lock to guard all pagetable pages of the mm.
*/
#define pte_lock_init(page) do {} while (0)
#define pte_lock_deinit(page) do {} while (0)
#define pte_lockptr(mm, pmd) ({(void)(pmd); &(mm)->page_table_lock;})
#endif /* USE_SPLIT_PTLOCKS */
#endif /* USE_SPLIT_PTE_PTLOCKS */
static inline void pgtable_page_ctor(struct page *page)
{

8
include/linux/mm_types.h
View file

@ -23,7 +23,7 @@
struct address_space;
#define USE_SPLIT_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
/*
* Each physical page in the system has a struct page associated with
@ -141,7 +141,7 @@ struct page {
* indicates order in the buddy
* system if PG_buddy is set.
*/
#if USE_SPLIT_PTLOCKS
#if USE_SPLIT_PTE_PTLOCKS
spinlock_t ptl;
#endif
struct kmem_cache *slab_cache; /* SL[AU]B: Pointer to slab */
@ -309,14 +309,14 @@ enum {
NR_MM_COUNTERS
};
#if USE_SPLIT_PTLOCKS && defined(CONFIG_MMU)
#if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU)
#define SPLIT_RSS_COUNTING
/* per-thread cached information, */
struct task_rss_stat {
int events; /* for synchronization threshold */
int count[NR_MM_COUNTERS];
};
#endif /* USE_SPLIT_PTLOCKS */
#endif /* USE_SPLIT_PTE_PTLOCKS */
struct mm_rss_stat {
atomic_long_t count[NR_MM_COUNTERS];