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mm/memcg: Convert mem_cgroup_charge() to take a folio 

Convert all callers of mem_cgroup_charge() to call page_folio() on the
page they're currently passing in.  Many of them will be converted to
use folios themselves soon.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-06-25 09:27:04 -04:00
parent 118f287549
commit 8f425e4ed0
11 changed files with 44 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
include/linux/memcontrol.h
View File

@ -694,14 +694,28 @@ static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg)
page_counter_read(&memcg->memory);
}
int __mem_cgroup_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask);
static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask)
int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp);
/**
* mem_cgroup_charge - Charge a newly allocated folio to a cgroup.
* @folio: Folio to charge.
* @mm: mm context of the allocating task.
* @gfp: Reclaim mode.
*
* Try to charge @folio to the memcg that @mm belongs to, reclaiming
* pages according to @gfp if necessary. If @mm is NULL, try to
* charge to the active memcg.
*
* Do not use this for folios allocated for swapin.
*
* Return: 0 on success. Otherwise, an error code is returned.
*/
static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm,
gfp_t gfp)
{
if (mem_cgroup_disabled())
return 0;
return __mem_cgroup_charge(page, mm, gfp_mask);
return __mem_cgroup_charge(folio, mm, gfp);
}
int mem_cgroup_swapin_charge_page(struct page *page, struct mm_struct *mm,
@ -1199,8 +1213,8 @@ static inline bool mem_cgroup_below_min(struct mem_cgroup *memcg)
return false;
}
static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask)
static inline int mem_cgroup_charge(struct folio *folio,
struct mm_struct *mm, gfp_t gfp)
{
return 0;
}

3
kernel/events/uprobes.c
View File

@ -167,7 +167,8 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
addr + PAGE_SIZE);
if (new_page) {
err = mem_cgroup_charge(new_page, vma->vm_mm, GFP_KERNEL);
err = mem_cgroup_charge(page_folio(new_page), vma->vm_mm,
GFP_KERNEL);
if (err)
return err;
}

2
mm/filemap.c
View File

@ -889,7 +889,7 @@ noinline int __add_to_page_cache_locked(struct page *page,
page->index = offset;
if (!huge) {
error = mem_cgroup_charge(page, NULL, gfp);
error = mem_cgroup_charge(page_folio(page), NULL, gfp);
if (error)
goto error;
charged = true;

2
mm/huge_memory.c
View File

@ -603,7 +603,7 @@ static vm_fault_t __do_huge_pmd_anonymous_page(struct vm_fault *vmf,
VM_BUG_ON_PAGE(!PageCompound(page), page);
if (mem_cgroup_charge(page, vma->vm_mm, gfp)) {
if (mem_cgroup_charge(page_folio(page), vma->vm_mm, gfp)) {
put_page(page);
count_vm_event(THP_FAULT_FALLBACK);
count_vm_event(THP_FAULT_FALLBACK_CHARGE);

4
mm/khugepaged.c
View File

@ -1087,7 +1087,7 @@ static void collapse_huge_page(struct mm_struct *mm,
goto out_nolock;
}
if (unlikely(mem_cgroup_charge(new_page, mm, gfp))) {
if (unlikely(mem_cgroup_charge(page_folio(new_page), mm, gfp))) {
result = SCAN_CGROUP_CHARGE_FAIL;
goto out_nolock;
}
@ -1658,7 +1658,7 @@ static void collapse_file(struct mm_struct *mm,
goto out;
}
if (unlikely(mem_cgroup_charge(new_page, mm, gfp))) {
if (unlikely(mem_cgroup_charge(page_folio(new_page), mm, gfp))) {
result = SCAN_CGROUP_CHARGE_FAIL;
goto out;
}

3
mm/ksm.c
View File

@ -2578,7 +2578,8 @@ struct page *ksm_might_need_to_copy(struct page *page,
return page; /* let do_swap_page report the error */
new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address);
if (new_page && mem_cgroup_charge(new_page, vma->vm_mm, GFP_KERNEL)) {
if (new_page &&
mem_cgroup_charge(page_folio(new_page), vma->vm_mm, GFP_KERNEL)) {
put_page(new_page);
new_page = NULL;
}

28
mm/memcontrol.c
View File

@ -6660,9 +6660,9 @@ void mem_cgroup_calculate_protection(struct mem_cgroup *root,
atomic_long_read(&parent->memory.children_low_usage)));
}
static int charge_memcg(struct page *page, struct mem_cgroup *memcg, gfp_t gfp)
static int charge_memcg(struct folio *folio, struct mem_cgroup *memcg,
gfp_t gfp)
{
struct folio *folio = page_folio(page);
long nr_pages = folio_nr_pages(folio);
int ret;
@ -6675,34 +6675,19 @@ static int charge_memcg(struct page *page, struct mem_cgroup *memcg, gfp_t gfp)
local_irq_disable();
mem_cgroup_charge_statistics(memcg, nr_pages);
memcg_check_events(memcg, page_to_nid(page));
memcg_check_events(memcg, folio_nid(folio));
local_irq_enable();
out:
return ret;
}
/**
* __mem_cgroup_charge - charge a newly allocated page to a cgroup
* @page: page to charge
* @mm: mm context of the victim
* @gfp_mask: reclaim mode
*
* Try to charge @page to the memcg that @mm belongs to, reclaiming
* pages according to @gfp_mask if necessary. if @mm is NULL, try to
* charge to the active memcg.
*
* Do not use this for pages allocated for swapin.
*
* Returns 0 on success. Otherwise, an error code is returned.
*/
int __mem_cgroup_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask)
int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp)
{
struct mem_cgroup *memcg;
int ret;
memcg = get_mem_cgroup_from_mm(mm);
ret = charge_memcg(page, memcg, gfp_mask);
ret = charge_memcg(folio, memcg, gfp);
css_put(&memcg->css);
return ret;
@ -6723,6 +6708,7 @@ int __mem_cgroup_charge(struct page *page, struct mm_struct *mm,
int mem_cgroup_swapin_charge_page(struct page *page, struct mm_struct *mm,
gfp_t gfp, swp_entry_t entry)
{
struct folio *folio = page_folio(page);
struct mem_cgroup *memcg;
unsigned short id;
int ret;
@ -6737,7 +6723,7 @@ int mem_cgroup_swapin_charge_page(struct page *page, struct mm_struct *mm,
memcg = get_mem_cgroup_from_mm(mm);
rcu_read_unlock();
ret = charge_memcg(page, memcg, gfp);
ret = charge_memcg(folio, memcg, gfp);
css_put(&memcg->css);
return ret;

9
mm/memory.c
View File

@ -990,7 +990,7 @@ page_copy_prealloc(struct mm_struct *src_mm, struct vm_area_struct *vma,
if (!new_page)
return NULL;
if (mem_cgroup_charge(new_page, src_mm, GFP_KERNEL)) {
if (mem_cgroup_charge(page_folio(new_page), src_mm, GFP_KERNEL)) {
put_page(new_page);
return NULL;
}
@ -3019,7 +3019,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
}
}
if (mem_cgroup_charge(new_page, mm, GFP_KERNEL))
if (mem_cgroup_charge(page_folio(new_page), mm, GFP_KERNEL))
goto oom_free_new;
cgroup_throttle_swaprate(new_page, GFP_KERNEL);
@ -3769,7 +3769,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
if (!page)
goto oom;
if (mem_cgroup_charge(page, vma->vm_mm, GFP_KERNEL))
if (mem_cgroup_charge(page_folio(page), vma->vm_mm, GFP_KERNEL))
goto oom_free_page;
cgroup_throttle_swaprate(page, GFP_KERNEL);
@ -4193,7 +4193,8 @@ static vm_fault_t do_cow_fault(struct vm_fault *vmf)
if (!vmf->cow_page)
return VM_FAULT_OOM;
if (mem_cgroup_charge(vmf->cow_page, vma->vm_mm, GFP_KERNEL)) {
if (mem_cgroup_charge(page_folio(vmf->cow_page), vma->vm_mm,
GFP_KERNEL)) {
put_page(vmf->cow_page);
return VM_FAULT_OOM;
}

2
mm/migrate.c
View File

@ -2846,7 +2846,7 @@ static void migrate_vma_insert_page(struct migrate_vma *migrate,
if (unlikely(anon_vma_prepare(vma)))
goto abort;
if (mem_cgroup_charge(page, vma->vm_mm, GFP_KERNEL))
if (mem_cgroup_charge(page_folio(page), vma->vm_mm, GFP_KERNEL))
goto abort;
/*

2
mm/shmem.c
View File

@ -710,7 +710,7 @@ static int shmem_add_to_page_cache(struct page *page,
page->index = index;
if (!PageSwapCache(page)) {
error = mem_cgroup_charge(page, charge_mm, gfp);
error = mem_cgroup_charge(page_folio(page), charge_mm, gfp);
if (error) {
if (PageTransHuge(page)) {
count_vm_event(THP_FILE_FALLBACK);

2
mm/userfaultfd.c
View File

@ -164,7 +164,7 @@ static int mcopy_atomic_pte(struct mm_struct *dst_mm,
__SetPageUptodate(page);
ret = -ENOMEM;
if (mem_cgroup_charge(page, dst_mm, GFP_KERNEL))
if (mem_cgroup_charge(page_folio(page), dst_mm, GFP_KERNEL))
goto out_release;
ret = mfill_atomic_install_pte(dst_mm, dst_pmd, dst_vma, dst_addr,