#include <linux/mm.h>
#include <linux/sched.h>
+#include <linux/sched/coredump.h>
+#include <linux/sched/numa_balancing.h>
#include <linux/highmem.h>
#include <linux/hugetlb.h>
#include <linux/mmu_notifier.h>
};
#ifdef CONFIG_SYSFS
-
-static ssize_t triple_flag_store(struct kobject *kobj,
- struct kobj_attribute *attr,
- const char *buf, size_t count,
- enum transparent_hugepage_flag enabled,
- enum transparent_hugepage_flag deferred,
- enum transparent_hugepage_flag req_madv)
-{
- if (!memcmp("defer", buf,
- min(sizeof("defer")-1, count))) {
- if (enabled == deferred)
- return -EINVAL;
- clear_bit(enabled, &transparent_hugepage_flags);
- clear_bit(req_madv, &transparent_hugepage_flags);
- set_bit(deferred, &transparent_hugepage_flags);
- } else if (!memcmp("always", buf,
- min(sizeof("always")-1, count))) {
- clear_bit(deferred, &transparent_hugepage_flags);
- clear_bit(req_madv, &transparent_hugepage_flags);
- set_bit(enabled, &transparent_hugepage_flags);
- } else if (!memcmp("madvise", buf,
- min(sizeof("madvise")-1, count))) {
- clear_bit(enabled, &transparent_hugepage_flags);
- clear_bit(deferred, &transparent_hugepage_flags);
- set_bit(req_madv, &transparent_hugepage_flags);
- } else if (!memcmp("never", buf,
- min(sizeof("never")-1, count))) {
- clear_bit(enabled, &transparent_hugepage_flags);
- clear_bit(req_madv, &transparent_hugepage_flags);
- clear_bit(deferred, &transparent_hugepage_flags);
- } else
- return -EINVAL;
-
- return count;
-}
-
static ssize_t enabled_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct kobj_attribute *attr,
const char *buf, size_t count)
{
- ssize_t ret;
+ ssize_t ret = count;
- ret = triple_flag_store(kobj, attr, buf, count,
- TRANSPARENT_HUGEPAGE_FLAG,
- TRANSPARENT_HUGEPAGE_FLAG,
- TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG);
+ if (!memcmp("always", buf,
+ min(sizeof("always")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ set_bit(TRANSPARENT_HUGEPAGE_FLAG, &transparent_hugepage_flags);
+ } else if (!memcmp("madvise", buf,
+ min(sizeof("madvise")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_FLAG, &transparent_hugepage_flags);
+ set_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ } else if (!memcmp("never", buf,
+ min(sizeof("never")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ } else
+ ret = -EINVAL;
if (ret > 0) {
int err = start_stop_khugepaged();
if (err)
ret = err;
}
-
return ret;
}
static struct kobj_attribute enabled_attr =
return count;
}
-/*
- * Currently defrag only disables __GFP_NOWAIT for allocation. A blind
- * __GFP_REPEAT is too aggressive, it's never worth swapping tons of
- * memory just to allocate one more hugepage.
- */
static ssize_t defrag_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags))
- return sprintf(buf, "[always] defer madvise never\n");
+ return sprintf(buf, "[always] defer defer+madvise madvise never\n");
if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags))
- return sprintf(buf, "always [defer] madvise never\n");
- else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags))
- return sprintf(buf, "always defer [madvise] never\n");
- else
- return sprintf(buf, "always defer madvise [never]\n");
-
+ return sprintf(buf, "always [defer] defer+madvise madvise never\n");
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags))
+ return sprintf(buf, "always defer [defer+madvise] madvise never\n");
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags))
+ return sprintf(buf, "always defer defer+madvise [madvise] never\n");
+ return sprintf(buf, "always defer defer+madvise madvise [never]\n");
}
+
static ssize_t defrag_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
- return triple_flag_store(kobj, attr, buf, count,
- TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG,
- TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG,
- TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG);
+ if (!memcmp("always", buf,
+ min(sizeof("always")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ set_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags);
+ } else if (!memcmp("defer", buf,
+ min(sizeof("defer")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ set_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags);
+ } else if (!memcmp("defer+madvise", buf,
+ min(sizeof("defer+madvise")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ set_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags);
+ } else if (!memcmp("madvise", buf,
+ min(sizeof("madvise")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags);
+ set_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ } else if (!memcmp("never", buf,
+ min(sizeof("never")-1, count))) {
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags);
+ clear_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags);
+ } else
+ return -EINVAL;
+
+ return count;
}
static struct kobj_attribute defrag_attr =
__ATTR(defrag, 0644, defrag_show, defrag_store);
}
/*
- * If THP defrag is set to always then directly reclaim/compact as necessary
- * If set to defer then do only background reclaim/compact and defer to khugepaged
- * If set to madvise and the VMA is flagged then directly reclaim/compact
- * When direct reclaim/compact is allowed, don't retry except for flagged VMA's
+ * always: directly stall for all thp allocations
+ * defer: wake kswapd and fail if not immediately available
+ * defer+madvise: wake kswapd and directly stall for MADV_HUGEPAGE, otherwise
+ * fail if not immediately available
+ * madvise: directly stall for MADV_HUGEPAGE, otherwise fail if not immediately
+ * available
+ * never: never stall for any thp allocation
*/
static inline gfp_t alloc_hugepage_direct_gfpmask(struct vm_area_struct *vma)
{
- bool vma_madvised = !!(vma->vm_flags & VM_HUGEPAGE);
+ const bool vma_madvised = !!(vma->vm_flags & VM_HUGEPAGE);
- if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
- &transparent_hugepage_flags) && vma_madvised)
- return GFP_TRANSHUGE;
- else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG,
- &transparent_hugepage_flags))
- return GFP_TRANSHUGE_LIGHT | __GFP_KSWAPD_RECLAIM;
- else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG,
- &transparent_hugepage_flags))
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags))
return GFP_TRANSHUGE | (vma_madvised ? 0 : __GFP_NORETRY);
-
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags))
+ return GFP_TRANSHUGE_LIGHT | __GFP_KSWAPD_RECLAIM;
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags))
+ return GFP_TRANSHUGE_LIGHT | (vma_madvised ? __GFP_DIRECT_RECLAIM :
+ __GFP_KSWAPD_RECLAIM);
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags))
+ return GFP_TRANSHUGE_LIGHT | (vma_madvised ? __GFP_DIRECT_RECLAIM :
+ 0);
return GFP_TRANSHUGE_LIGHT;
}
}
EXPORT_SYMBOL_GPL(vmf_insert_pfn_pmd);
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
+static pud_t maybe_pud_mkwrite(pud_t pud, struct vm_area_struct *vma)
+{
+ if (likely(vma->vm_flags & VM_WRITE))
+ pud = pud_mkwrite(pud);
+ return pud;
+}
+
+static void insert_pfn_pud(struct vm_area_struct *vma, unsigned long addr,
+ pud_t *pud, pfn_t pfn, pgprot_t prot, bool write)
+{
+ struct mm_struct *mm = vma->vm_mm;
+ pud_t entry;
+ spinlock_t *ptl;
+
+ ptl = pud_lock(mm, pud);
+ entry = pud_mkhuge(pfn_t_pud(pfn, prot));
+ if (pfn_t_devmap(pfn))
+ entry = pud_mkdevmap(entry);
+ if (write) {
+ entry = pud_mkyoung(pud_mkdirty(entry));
+ entry = maybe_pud_mkwrite(entry, vma);
+ }
+ set_pud_at(mm, addr, pud, entry);
+ update_mmu_cache_pud(vma, addr, pud);
+ spin_unlock(ptl);
+}
+
+int vmf_insert_pfn_pud(struct vm_area_struct *vma, unsigned long addr,
+ pud_t *pud, pfn_t pfn, bool write)
+{
+ pgprot_t pgprot = vma->vm_page_prot;
+ /*
+ * If we had pud_special, we could avoid all these restrictions,
+ * but we need to be consistent with PTEs and architectures that
+ * can't support a 'special' bit.
+ */
+ BUG_ON(!(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP)));
+ BUG_ON((vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP)) ==
+ (VM_PFNMAP|VM_MIXEDMAP));
+ BUG_ON((vma->vm_flags & VM_PFNMAP) && is_cow_mapping(vma->vm_flags));
+ BUG_ON(!pfn_t_devmap(pfn));
+
+ if (addr < vma->vm_start || addr >= vma->vm_end)
+ return VM_FAULT_SIGBUS;
+
+ track_pfn_insert(vma, &pgprot, pfn);
+
+ insert_pfn_pud(vma, addr, pud, pfn, pgprot, write);
+ return VM_FAULT_NOPAGE;
+}
+EXPORT_SYMBOL_GPL(vmf_insert_pfn_pud);
+#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
+
static void touch_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd)
{
return ret;
}
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
+static void touch_pud(struct vm_area_struct *vma, unsigned long addr,
+ pud_t *pud)
+{
+ pud_t _pud;
+
+ /*
+ * We should set the dirty bit only for FOLL_WRITE but for now
+ * the dirty bit in the pud is meaningless. And if the dirty
+ * bit will become meaningful and we'll only set it with
+ * FOLL_WRITE, an atomic set_bit will be required on the pud to
+ * set the young bit, instead of the current set_pud_at.
+ */
+ _pud = pud_mkyoung(pud_mkdirty(*pud));
+ if (pudp_set_access_flags(vma, addr & HPAGE_PUD_MASK,
+ pud, _pud, 1))
+ update_mmu_cache_pud(vma, addr, pud);
+}
+
+struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr,
+ pud_t *pud, int flags)
+{
+ unsigned long pfn = pud_pfn(*pud);
+ struct mm_struct *mm = vma->vm_mm;
+ struct dev_pagemap *pgmap;
+ struct page *page;
+
+ assert_spin_locked(pud_lockptr(mm, pud));
+
+ if (flags & FOLL_WRITE && !pud_write(*pud))
+ return NULL;
+
+ if (pud_present(*pud) && pud_devmap(*pud))
+ /* pass */;
+ else
+ return NULL;
+
+ if (flags & FOLL_TOUCH)
+ touch_pud(vma, addr, pud);
+
+ /*
+ * device mapped pages can only be returned if the
+ * caller will manage the page reference count.
+ */
+ if (!(flags & FOLL_GET))
+ return ERR_PTR(-EEXIST);
+
+ pfn += (addr & ~PUD_MASK) >> PAGE_SHIFT;
+ pgmap = get_dev_pagemap(pfn, NULL);
+ if (!pgmap)
+ return ERR_PTR(-EFAULT);
+ page = pfn_to_page(pfn);
+ get_page(page);
+ put_dev_pagemap(pgmap);
+
+ return page;
+}
+
+int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm,
+ pud_t *dst_pud, pud_t *src_pud, unsigned long addr,
+ struct vm_area_struct *vma)
+{
+ spinlock_t *dst_ptl, *src_ptl;
+ pud_t pud;
+ int ret;
+
+ dst_ptl = pud_lock(dst_mm, dst_pud);
+ src_ptl = pud_lockptr(src_mm, src_pud);
+ spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING);
+
+ ret = -EAGAIN;
+ pud = *src_pud;
+ if (unlikely(!pud_trans_huge(pud) && !pud_devmap(pud)))
+ goto out_unlock;
+
+ /*
+ * When page table lock is held, the huge zero pud should not be
+ * under splitting since we don't split the page itself, only pud to
+ * a page table.
+ */
+ if (is_huge_zero_pud(pud)) {
+ /* No huge zero pud yet */
+ }
+
+ pudp_set_wrprotect(src_mm, addr, src_pud);
+ pud = pud_mkold(pud_wrprotect(pud));
+ set_pud_at(dst_mm, addr, dst_pud, pud);
+
+ ret = 0;
+out_unlock:
+ spin_unlock(src_ptl);
+ spin_unlock(dst_ptl);
+ return ret;
+}
+
+void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud)
+{
+ pud_t entry;
+ unsigned long haddr;
+ bool write = vmf->flags & FAULT_FLAG_WRITE;
+
+ vmf->ptl = pud_lock(vmf->vma->vm_mm, vmf->pud);
+ if (unlikely(!pud_same(*vmf->pud, orig_pud)))
+ goto unlock;
+
+ entry = pud_mkyoung(orig_pud);
+ if (write)
+ entry = pud_mkdirty(entry);
+ haddr = vmf->address & HPAGE_PUD_MASK;
+ if (pudp_set_access_flags(vmf->vma, haddr, vmf->pud, entry, write))
+ update_mmu_cache_pud(vmf->vma, vmf->address, vmf->pud);
+
+unlock:
+ spin_unlock(vmf->ptl);
+}
+#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
+
void huge_pmd_set_accessed(struct vm_fault *vmf, pmd_t orig_pmd)
{
pmd_t entry;
}
/* See similar comment in do_numa_page for explanation */
- if (!pmd_write(pmd))
+ if (!pmd_savedwrite(pmd))
flags |= TNF_NO_GROUP;
/*
goto out;
clear_pmdnuma:
BUG_ON(!PageLocked(page));
- was_writable = pmd_write(pmd);
+ was_writable = pmd_savedwrite(pmd);
pmd = pmd_modify(pmd, vma->vm_page_prot);
pmd = pmd_mkyoung(pmd);
if (was_writable)
if (page_nid != -1)
task_numa_fault(last_cpupid, page_nid, HPAGE_PMD_NR,
- vmf->flags);
+ flags);
return 0;
}
entry = pmdp_huge_get_and_clear_notify(mm, addr, pmd);
entry = pmd_modify(entry, newprot);
if (preserve_write)
- entry = pmd_mkwrite(entry);
+ entry = pmd_mk_savedwrite(entry);
ret = HPAGE_PMD_NR;
set_pmd_at(mm, addr, pmd, entry);
BUG_ON(vma_is_anonymous(vma) && !preserve_write &&
return NULL;
}
+/*
+ * Returns true if a given pud maps a thp, false otherwise.
+ *
+ * Note that if it returns true, this routine returns without unlocking page
+ * table lock. So callers must unlock it.
+ */
+spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma)
+{
+ spinlock_t *ptl;
+
+ ptl = pud_lock(vma->vm_mm, pud);
+ if (likely(pud_trans_huge(*pud) || pud_devmap(*pud)))
+ return ptl;
+ spin_unlock(ptl);
+ return NULL;
+}
+
+#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
+int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma,
+ pud_t *pud, unsigned long addr)
+{
+ pud_t orig_pud;
+ spinlock_t *ptl;
+
+ ptl = __pud_trans_huge_lock(pud, vma);
+ if (!ptl)
+ return 0;
+ /*
+ * For architectures like ppc64 we look at deposited pgtable
+ * when calling pudp_huge_get_and_clear. So do the
+ * pgtable_trans_huge_withdraw after finishing pudp related
+ * operations.
+ */
+ orig_pud = pudp_huge_get_and_clear_full(tlb->mm, addr, pud,
+ tlb->fullmm);
+ tlb_remove_pud_tlb_entry(tlb, pud, addr);
+ if (vma_is_dax(vma)) {
+ spin_unlock(ptl);
+ /* No zero page support yet */
+ } else {
+ /* No support for anonymous PUD pages yet */
+ BUG();
+ }
+ return 1;
+}
+
+static void __split_huge_pud_locked(struct vm_area_struct *vma, pud_t *pud,
+ unsigned long haddr)
+{
+ VM_BUG_ON(haddr & ~HPAGE_PUD_MASK);
+ VM_BUG_ON_VMA(vma->vm_start > haddr, vma);
+ VM_BUG_ON_VMA(vma->vm_end < haddr + HPAGE_PUD_SIZE, vma);
+ VM_BUG_ON(!pud_trans_huge(*pud) && !pud_devmap(*pud));
+
+ count_vm_event(THP_SPLIT_PMD);
+
+ pudp_huge_clear_flush_notify(vma, haddr, pud);
+}
+
+void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud,
+ unsigned long address)
+{
+ spinlock_t *ptl;
+ struct mm_struct *mm = vma->vm_mm;
+ unsigned long haddr = address & HPAGE_PUD_MASK;
+
+ mmu_notifier_invalidate_range_start(mm, haddr, haddr + HPAGE_PUD_SIZE);
+ ptl = pud_lock(mm, pud);
+ if (unlikely(!pud_trans_huge(*pud) && !pud_devmap(*pud)))
+ goto out;
+ __split_huge_pud_locked(vma, pud, haddr);
+
+out:
+ spin_unlock(ptl);
+ mmu_notifier_invalidate_range_end(mm, haddr, haddr + HPAGE_PUD_SIZE);
+}
+#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
+
static void __split_huge_zero_page_pmd(struct vm_area_struct *vma,
unsigned long haddr, pmd_t *pmd)
{
static void freeze_page(struct page *page)
{
enum ttu_flags ttu_flags = TTU_IGNORE_MLOCK | TTU_IGNORE_ACCESS |
- TTU_RMAP_LOCKED;
- int i, ret;
+ TTU_RMAP_LOCKED | TTU_SPLIT_HUGE_PMD;
+ int ret;
VM_BUG_ON_PAGE(!PageHead(page), page);
if (PageAnon(page))
ttu_flags |= TTU_MIGRATION;
- /* We only need TTU_SPLIT_HUGE_PMD once */
- ret = try_to_unmap(page, ttu_flags | TTU_SPLIT_HUGE_PMD);
- for (i = 1; !ret && i < HPAGE_PMD_NR; i++) {
- /* Cut short if the page is unmapped */
- if (page_count(page) == 1)
- return;
-
- ret = try_to_unmap(page + i, ttu_flags);
- }
- VM_BUG_ON_PAGE(ret, page + i - 1);
+ ret = try_to_unmap(page, ttu_flags);
+ VM_BUG_ON_PAGE(ret, page);
}
static void unfreeze_page(struct page *page)
{
int i;
-
- for (i = 0; i < HPAGE_PMD_NR; i++)
- remove_migration_ptes(page + i, page + i, true);
+ if (PageTransHuge(page)) {
+ remove_migration_ptes(page, page, true);
+ } else {
+ for (i = 0; i < HPAGE_PMD_NR; i++)
+ remove_migration_ptes(page + i, page + i, true);
+ }
}
static void __split_huge_page_tail(struct page *head, int tail,
projects / karo-tx-linux.git / blobdiff