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Revert "mm/hugetlb_cgroup: convert hugetlb_cgroup_uncharge_page() to folios"

Browse Source 
This reverts commit cc8f0d90ba which is
commit d4ab0316cc upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: Ifdfb62b35c5f8aab3cb387f122f3cd7e0fbc8840
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2024-07-20 12:48:47 +00:00
parent 00ebd8ec69
commit dd84aa68cd
3 changed files with 25 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
include/linux/hugetlb_cgroup.h
View File

@@ -158,10 +158,10 @@ extern void hugetlb_cgroup_commit_charge(int idx, unsigned long nr_pages,
extern void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
struct hugetlb_cgroup *h_cg,
struct page *page);
extern void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages,
struct folio *folio);
extern void hugetlb_cgroup_uncharge_folio_rsvd(int idx, unsigned long nr_pages,
struct folio *folio);
extern void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
struct page *page);
extern void hugetlb_cgroup_uncharge_page_rsvd(int idx, unsigned long nr_pages,
struct page *page);
extern void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
struct hugetlb_cgroup *h_cg);
@@ -254,14 +254,14 @@ hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
{
}
static inline void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages,
struct folio *folio)
static inline void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
struct page *page)
{
}
static inline void hugetlb_cgroup_uncharge_folio_rsvd(int idx,
static inline void hugetlb_cgroup_uncharge_page_rsvd(int idx,
unsigned long nr_pages,
struct folio *folio)
struct page *page)
{
}
static inline void hugetlb_cgroup_uncharge_cgroup(int idx,

15
mm/hugetlb.c
View File

@@ -1955,10 +1955,10 @@ void free_huge_page(struct page *page)
spin_lock_irqsave(&hugetlb_lock, flags);
folio_clear_hugetlb_migratable(folio);
hugetlb_cgroup_uncharge_folio(hstate_index(h),
pages_per_huge_page(h), folio);
hugetlb_cgroup_uncharge_folio_rsvd(hstate_index(h),
pages_per_huge_page(h), folio);
hugetlb_cgroup_uncharge_page(hstate_index(h),
pages_per_huge_page(h), page);
hugetlb_cgroup_uncharge_page_rsvd(hstate_index(h),
pages_per_huge_page(h), page);
if (restore_reserve)
h->resv_huge_pages++;
@@ -3081,7 +3081,6 @@ struct page *alloc_huge_page(struct vm_area_struct *vma,
struct hugepage_subpool *spool = subpool_vma(vma);
struct hstate *h = hstate_vma(vma);
struct page *page;
struct folio *folio;
long map_chg, map_commit;
long gbl_chg;
int ret, idx;
@@ -3145,7 +3144,6 @@ struct page *alloc_huge_page(struct vm_area_struct *vma,
* a reservation exists for the allocation.
*/
page = dequeue_huge_page_vma(h, vma, addr, avoid_reserve, gbl_chg);
if (!page) {
spin_unlock_irq(&hugetlb_lock);
page = alloc_buddy_huge_page_with_mpol(h, vma, addr);
@@ -3160,7 +3158,6 @@ struct page *alloc_huge_page(struct vm_area_struct *vma,
set_page_refcounted(page);
/* Fall through */
}
folio = page_folio(page);
hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, page);
/* If allocation is not consuming a reservation, also store the
* hugetlb_cgroup pointer on the page.
@@ -3190,8 +3187,8 @@ struct page *alloc_huge_page(struct vm_area_struct *vma,
rsv_adjust = hugepage_subpool_put_pages(spool, 1);
hugetlb_acct_memory(h, -rsv_adjust);
if (deferred_reserve)
hugetlb_cgroup_uncharge_folio_rsvd(hstate_index(h),
pages_per_huge_page(h), folio);
hugetlb_cgroup_uncharge_page_rsvd(hstate_index(h),
pages_per_huge_page(h), page);
}
return page;

21
mm/hugetlb_cgroup.c
View File

@@ -346,10 +346,11 @@ void hugetlb_cgroup_commit_charge_rsvd(int idx, unsigned long nr_pages,
/*
* Should be called with hugetlb_lock held
*/
static void __hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages,
struct folio *folio, bool rsvd)
static void __hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
struct page *page, bool rsvd)
{
struct hugetlb_cgroup *h_cg;
struct folio *folio = page_folio(page);
if (hugetlb_cgroup_disabled())
return;
@@ -367,27 +368,27 @@ static void __hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages,
css_put(&h_cg->css);
else {
unsigned long usage =
h_cg->nodeinfo[folio_nid(folio)]->usage[idx];
h_cg->nodeinfo[page_to_nid(page)]->usage[idx];
/*
* This write is not atomic due to fetching usage and writing
* to it, but that's fine because we call this with
* hugetlb_lock held anyway.
*/
WRITE_ONCE(h_cg->nodeinfo[folio_nid(folio)]->usage[idx],
WRITE_ONCE(h_cg->nodeinfo[page_to_nid(page)]->usage[idx],
usage - nr_pages);
}
}
void hugetlb_cgroup_uncharge_folio(int idx, unsigned long nr_pages,
struct folio *folio)
void hugetlb_cgroup_uncharge_page(int idx, unsigned long nr_pages,
struct page *page)
{
__hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, false);
__hugetlb_cgroup_uncharge_page(idx, nr_pages, page, false);
}
void hugetlb_cgroup_uncharge_folio_rsvd(int idx, unsigned long nr_pages,
struct folio *folio)
void hugetlb_cgroup_uncharge_page_rsvd(int idx, unsigned long nr_pages,
struct page *page)
{
__hugetlb_cgroup_uncharge_folio(idx, nr_pages, folio, true);
__hugetlb_cgroup_uncharge_page(idx, nr_pages, page, true);
}
static void __hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,