@@ -743,9 +743,9 @@ static void free_pud_table(pud_t *pud_start, p4d_t *p4d)
}
static void remove_pte_table(pte_t *pte_start, unsigned long addr,
- unsigned long end)
+ unsigned long end, bool direct)
{
- unsigned long next;
+ unsigned long next, pages = 0;
pte_t *pte;
pte = pte_start + pte_index(addr);
@@ -767,13 +767,16 @@ static void remove_pte_table(pte_t *pte_start, unsigned long addr,
}
pte_clear(&init_mm, addr, pte);
+ pages++;
}
+ if (direct)
+ update_page_count(mmu_virtual_psize, -pages);
}
static void __meminit remove_pmd_table(pmd_t *pmd_start, unsigned long addr,
- unsigned long end)
+ unsigned long end, bool direct)
{
- unsigned long next;
+ unsigned long next, pages = 0;
pte_t *pte_base;
pmd_t *pmd;
@@ -791,19 +794,22 @@ static void __meminit remove_pmd_table(pmd_t *pmd_start, unsigned long addr,
continue;
}
pte_clear(&init_mm, addr, (pte_t *)pmd);
+ pages++;
continue;
}
pte_base = (pte_t *)pmd_page_vaddr(*pmd);
- remove_pte_table(pte_base, addr, next);
+ remove_pte_table(pte_base, addr, next, direct);
free_pte_table(pte_base, pmd);
}
+ if (direct)
+ update_page_count(MMU_PAGE_2M, -pages);
}
static void __meminit remove_pud_table(pud_t *pud_start, unsigned long addr,
- unsigned long end)
+ unsigned long end, bool direct)
{
- unsigned long next;
+ unsigned long next, pages = 0;
pmd_t *pmd_base;
pud_t *pud;
@@ -821,16 +827,20 @@ static void __meminit remove_pud_table(pud_t *pud_start, unsigned long addr,
continue;
}
pte_clear(&init_mm, addr, (pte_t *)pud);
+ pages++;
continue;
}
pmd_base = pud_pgtable(*pud);
- remove_pmd_table(pmd_base, addr, next);
+ remove_pmd_table(pmd_base, addr, next, direct);
free_pmd_table(pmd_base, pud);
}
+ if (direct)
+ update_page_count(MMU_PAGE_1G, -pages);
}
-static void __meminit remove_pagetable(unsigned long start, unsigned long end)
+static void __meminit remove_pagetable(unsigned long start, unsigned long end,
+ bool direct)
{
unsigned long addr, next;
pud_t *pud_base;
@@ -859,7 +869,7 @@ static void __meminit remove_pagetable(unsigned long start, unsigned long end)
}
pud_base = p4d_pgtable(*p4d);
- remove_pud_table(pud_base, addr, next);
+ remove_pud_table(pud_base, addr, next, direct);
free_pud_table(pud_base, p4d);
}
@@ -882,7 +892,7 @@ int __meminit radix__create_section_mapping(unsigned long start,
int __meminit radix__remove_section_mapping(unsigned long start, unsigned long end)
{
- remove_pagetable(start, end);
+ remove_pagetable(start, end, true);
return 0;
}
#endif /* CONFIG_MEMORY_HOTPLUG */
@@ -918,7 +928,7 @@ int __meminit radix__vmemmap_create_mapping(unsigned long start,
#ifdef CONFIG_MEMORY_HOTPLUG
void __meminit radix__vmemmap_remove_mapping(unsigned long start, unsigned long page_size)
{
- remove_pagetable(start, start + page_size);
+ remove_pagetable(start, start + page_size, false);
}
#endif
#endif
On memory unplug reduce DirectMap page count correctly. root@ubuntu-guest:# grep Direct /proc/meminfo DirectMap4k: 0 kB DirectMap64k: 0 kB DirectMap2M: 115343360 kB DirectMap1G: 0 kB Before fix: root@ubuntu-guest:# ndctl disable-namespace all disabled 1 namespace root@ubuntu-guest:# grep Direct /proc/meminfo DirectMap4k: 0 kB DirectMap64k: 0 kB DirectMap2M: 115343360 kB DirectMap1G: 0 kB After fix: root@ubuntu-guest:# ndctl disable-namespace all disabled 1 namespace root@ubuntu-guest:# grep Direct /proc/meminfo DirectMap4k: 0 kB DirectMap64k: 0 kB DirectMap2M: 104857600 kB DirectMap1G: 0 kB Fixes: a2dc009afa9a ("powerpc/mm/book3s/radix: Add mapping statistics") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> --- arch/powerpc/mm/book3s64/radix_pgtable.c | 34 +++++++++++++++--------- 1 file changed, 22 insertions(+), 12 deletions(-)