UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

mm/workingset: Convert workingset_eviction() to take a folio 

This removes an assumption that THPs are the only kind of compound
pages and removes a few hidden calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-12-23 16:39:05 -05:00
parent 1b7f7e58de
commit 8927f6473e
3 changed files with 18 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/swap.h
View File

@ -328,7 +328,7 @@ static inline swp_entry_t folio_swap_entry(struct folio *folio)
/* linux/mm/workingset.c */
void workingset_age_nonresident(struct lruvec *lruvec, unsigned long nr_pages);
void *workingset_eviction(struct page *page, struct mem_cgroup *target_memcg);
void *workingset_eviction(struct folio *folio, struct mem_cgroup *target_memcg);
void workingset_refault(struct folio *folio, void *shadow);
void workingset_activation(struct folio *folio);

7
mm/vmscan.c
View File

@ -1242,6 +1242,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping)
static int __remove_mapping(struct address_space *mapping, struct page *page,
bool reclaimed, struct mem_cgroup *target_memcg)
{
struct folio *folio = page_folio(page);
int refcount;
void *shadow = NULL;
@ -1289,7 +1290,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
swp_entry_t swap = { .val = page_private(page) };
mem_cgroup_swapout(page, swap);
if (reclaimed && !mapping_exiting(mapping))
shadow = workingset_eviction(page, target_memcg);
shadow = workingset_eviction(folio, target_memcg);
__delete_from_swap_cache(page, swap, shadow);
xa_unlock_irq(&mapping->i_pages);
put_swap_page(page, swap);
@ -1315,8 +1316,8 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
*/
if (reclaimed && page_is_file_lru(page) &&
!mapping_exiting(mapping) && !dax_mapping(mapping))
shadow = workingset_eviction(page, target_memcg);
__delete_from_page_cache(page, shadow);
shadow = workingset_eviction(folio, target_memcg);
__filemap_remove_folio(folio, shadow);
xa_unlock_irq(&mapping->i_pages);
if (mapping_shrinkable(mapping))
inode_add_lru(mapping->host);

25
mm/workingset.c
View File

@ -245,31 +245,32 @@ void workingset_age_nonresident(struct lruvec *lruvec, unsigned long nr_pages)
}
/**
* workingset_eviction - note the eviction of a page from memory
* workingset_eviction - note the eviction of a folio from memory
* @target_memcg: the cgroup that is causing the reclaim
* @page: the page being evicted
* @folio: the folio being evicted
*
* Return: a shadow entry to be stored in @page->mapping->i_pages in place
* of the evicted @page so that a later refault can be detected.
* Return: a shadow entry to be stored in @folio->mapping->i_pages in place
* of the evicted @folio so that a later refault can be detected.
*/
void *workingset_eviction(struct page *page, struct mem_cgroup *target_memcg)
void *workingset_eviction(struct folio *folio, struct mem_cgroup *target_memcg)
{
struct pglist_data *pgdat = page_pgdat(page);
struct pglist_data *pgdat = folio_pgdat(folio);
unsigned long eviction;
struct lruvec *lruvec;
int memcgid;
/* Page is fully exclusive and pins page's memory cgroup pointer */
VM_BUG_ON_PAGE(PageLRU(page), page);
VM_BUG_ON_PAGE(page_count(page), page);
VM_BUG_ON_PAGE(!PageLocked(page), page);
/* Folio is fully exclusive and pins folio's memory cgroup pointer */
VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);
VM_BUG_ON_FOLIO(folio_ref_count(folio), folio);
VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
lruvec = mem_cgroup_lruvec(target_memcg, pgdat);
/* XXX: target_memcg can be NULL, go through lruvec */
memcgid = mem_cgroup_id(lruvec_memcg(lruvec));
eviction = atomic_long_read(&lruvec->nonresident_age);
workingset_age_nonresident(lruvec, thp_nr_pages(page));
return pack_shadow(memcgid, pgdat, eviction, PageWorkingset(page));
workingset_age_nonresident(lruvec, folio_nr_pages(folio));
return pack_shadow(memcgid, pgdat, eviction,
folio_test_workingset(folio));
}
/**