xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mm: pass the vmem_altmap to vmemmap_free

Browse Source 
We can just pass this on instead of having to do a radix tree lookup
without proper locking a few levels into the callchain.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig
2017-12-29 08:53:56 +01:00
committed by Dan Williams
parent da024512a1
commit 24b6d41643
10 changed files with 68 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
arch/x86/mm/init_64.c
View File

@@ -800,11 +800,11 @@ int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
#define PAGE_INUSE 0xFD
static void __meminit free_pagetable(struct page *page, int order)
static void __meminit free_pagetable(struct page *page, int order,
struct vmem_altmap *altmap)
{
unsigned long magic;
unsigned int nr_pages = 1 << order;
struct vmem_altmap *altmap = to_vmem_altmap((unsigned long) page);
if (altmap) {
vmem_altmap_free(altmap, nr_pages);
@@ -826,7 +826,8 @@ static void __meminit free_pagetable(struct page *page, int order)
free_pages((unsigned long)page_address(page), order);
}
static void __meminit free_pte_table(pte_t *pte_start, pmd_t *pmd)
static void __meminit free_pte_table(pte_t *pte_start, pmd_t *pmd,
struct vmem_altmap *altmap)
{
pte_t *pte;
int i;
@@ -838,13 +839,14 @@ static void __meminit free_pte_table(pte_t *pte_start, pmd_t *pmd)
}
/* free a pte talbe */
free_pagetable(pmd_page(*pmd), 0);
free_pagetable(pmd_page(*pmd), 0, altmap);
spin_lock(&init_mm.page_table_lock);
pmd_clear(pmd);
spin_unlock(&init_mm.page_table_lock);
}
static void __meminit free_pmd_table(pmd_t *pmd_start, pud_t *pud)
static void __meminit free_pmd_table(pmd_t *pmd_start, pud_t *pud,
struct vmem_altmap *altmap)
{
pmd_t *pmd;
int i;
@@ -856,13 +858,14 @@ static void __meminit free_pmd_table(pmd_t *pmd_start, pud_t *pud)
}
/* free a pmd talbe */
free_pagetable(pud_page(*pud), 0);
free_pagetable(pud_page(*pud), 0, altmap);
spin_lock(&init_mm.page_table_lock);
pud_clear(pud);
spin_unlock(&init_mm.page_table_lock);
}
static void __meminit free_pud_table(pud_t *pud_start, p4d_t *p4d)
static void __meminit free_pud_table(pud_t *pud_start, p4d_t *p4d,
struct vmem_altmap *altmap)
{
pud_t *pud;
int i;
@@ -874,7 +877,7 @@ static void __meminit free_pud_table(pud_t *pud_start, p4d_t *p4d)
}
/* free a pud talbe */
free_pagetable(p4d_page(*p4d), 0);
free_pagetable(p4d_page(*p4d), 0, altmap);
spin_lock(&init_mm.page_table_lock);
p4d_clear(p4d);
spin_unlock(&init_mm.page_table_lock);
@@ -882,7 +885,7 @@ static void __meminit free_pud_table(pud_t *pud_start, p4d_t *p4d)
static void __meminit
remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
bool direct)
struct vmem_altmap *altmap, bool direct)
{
unsigned long next, pages = 0;
pte_t *pte;
@@ -913,7 +916,7 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
* freed when offlining, or simplely not in use.
*/
if (!direct)
free_pagetable(pte_page(*pte), 0);
free_pagetable(pte_page(*pte), 0, altmap);
spin_lock(&init_mm.page_table_lock);
pte_clear(&init_mm, addr, pte);
@@ -936,7 +939,7 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
page_addr = page_address(pte_page(*pte));
if (!memchr_inv(page_addr, PAGE_INUSE, PAGE_SIZE)) {
free_pagetable(pte_page(*pte), 0);
free_pagetable(pte_page(*pte), 0, altmap);
spin_lock(&init_mm.page_table_lock);
pte_clear(&init_mm, addr, pte);
@@ -953,7 +956,7 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
static void __meminit
remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
bool direct)
bool direct, struct vmem_altmap *altmap)
{
unsigned long next, pages = 0;
pte_t *pte_base;
@@ -972,7 +975,8 @@ remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
IS_ALIGNED(next, PMD_SIZE)) {
if (!direct)
free_pagetable(pmd_page(*pmd),
get_order(PMD_SIZE));
get_order(PMD_SIZE),
altmap);
spin_lock(&init_mm.page_table_lock);
pmd_clear(pmd);
@@ -986,7 +990,8 @@ remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
if (!memchr_inv(page_addr, PAGE_INUSE,
PMD_SIZE)) {
free_pagetable(pmd_page(*pmd),
get_order(PMD_SIZE));
get_order(PMD_SIZE),
altmap);
spin_lock(&init_mm.page_table_lock);
pmd_clear(pmd);
@@ -998,8 +1003,8 @@ remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
}
pte_base = (pte_t *)pmd_page_vaddr(*pmd);
remove_pte_table(pte_base, addr, next, direct);
free_pte_table(pte_base, pmd);
remove_pte_table(pte_base, addr, next, altmap, direct);
free_pte_table(pte_base, pmd, altmap);
}
/* Call free_pmd_table() in remove_pud_table(). */
@@ -1009,7 +1014,7 @@ remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
static void __meminit
remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
bool direct)
struct vmem_altmap *altmap, bool direct)
{
unsigned long next, pages = 0;
pmd_t *pmd_base;
@@ -1028,7 +1033,8 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
IS_ALIGNED(next, PUD_SIZE)) {
if (!direct)
free_pagetable(pud_page(*pud),
get_order(PUD_SIZE));
get_order(PUD_SIZE),
altmap);
spin_lock(&init_mm.page_table_lock);
pud_clear(pud);
@@ -1042,7 +1048,8 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
if (!memchr_inv(page_addr, PAGE_INUSE,
PUD_SIZE)) {
free_pagetable(pud_page(*pud),
get_order(PUD_SIZE));
get_order(PUD_SIZE),
altmap);
spin_lock(&init_mm.page_table_lock);
pud_clear(pud);
@@ -1054,8 +1061,8 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
}
pmd_base = pmd_offset(pud, 0);
remove_pmd_table(pmd_base, addr, next, direct);
free_pmd_table(pmd_base, pud);
remove_pmd_table(pmd_base, addr, next, direct, altmap);
free_pmd_table(pmd_base, pud, altmap);
}
if (direct)
@@ -1064,7 +1071,7 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
static void __meminit
remove_p4d_table(p4d_t *p4d_start, unsigned long addr, unsigned long end,
bool direct)
struct vmem_altmap *altmap, bool direct)
{
unsigned long next, pages = 0;
pud_t *pud_base;
@@ -1080,14 +1087,14 @@ remove_p4d_table(p4d_t *p4d_start, unsigned long addr, unsigned long end,
BUILD_BUG_ON(p4d_large(*p4d));
pud_base = pud_offset(p4d, 0);
remove_pud_table(pud_base, addr, next, direct);
remove_pud_table(pud_base, addr, next, altmap, direct);
/*
* For 4-level page tables we do not want to free PUDs, but in the
* 5-level case we should free them. This code will have to change
* to adapt for boot-time switching between 4 and 5 level page tables.
*/
if (CONFIG_PGTABLE_LEVELS == 5)
free_pud_table(pud_base, p4d);
free_pud_table(pud_base, p4d, altmap);
}
if (direct)
@@ -1096,7 +1103,8 @@ remove_p4d_table(p4d_t *p4d_start, unsigned long addr, unsigned long end,
/* start and end are both virtual address. */
static void __meminit
remove_pagetable(unsigned long start, unsigned long end, bool direct)
remove_pagetable(unsigned long start, unsigned long end, bool direct,
struct vmem_altmap *altmap)
{
unsigned long next;
unsigned long addr;
@@ -1111,15 +1119,16 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct)
continue;
p4d = p4d_offset(pgd, 0);
remove_p4d_table(p4d, addr, next, direct);
remove_p4d_table(p4d, addr, next, altmap, direct);
}
flush_tlb_all();
}
void __ref vmemmap_free(unsigned long start, unsigned long end)
void __ref vmemmap_free(unsigned long start, unsigned long end,
struct vmem_altmap *altmap)
{
remove_pagetable(start, end, false);
remove_pagetable(start, end, false, altmap);
}
#ifdef CONFIG_MEMORY_HOTREMOVE
@@ -1129,7 +1138,7 @@ kernel_physical_mapping_remove(unsigned long start, unsigned long end)
start = (unsigned long)__va(start);
end = (unsigned long)__va(end);
remove_pagetable(start, end, true);
remove_pagetable(start, end, true, NULL);
}
int __ref arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)