diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/filemap.c | 2 | ||||
| -rw-r--r-- | mm/memcontrol.c | 29 | ||||
| -rw-r--r-- | mm/migrate.c | 5 | ||||
| -rw-r--r-- | mm/shmem.c | 2 |
4 files changed, 12 insertions, 26 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 884766d..58e04e2 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -551,7 +551,7 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask) __inc_zone_page_state(new, NR_SHMEM); spin_unlock_irqrestore(&mapping->tree_lock, flags); mem_cgroup_end_page_stat(memcg); - mem_cgroup_migrate(old, new, true); + mem_cgroup_replace_page(old, new); radix_tree_preload_end(); if (freepage) freepage(old); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c0111cb..a44494f 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4531,9 +4531,8 @@ static int mem_cgroup_move_account(struct page *page, goto out; /* - * Prevent mem_cgroup_migrate() from looking at page->mem_cgroup - * of its source page while we change it: page migration takes - * both pages off the LRU, but page cache replacement doesn't. + * Prevent mem_cgroup_replace_page() from looking at + * page->mem_cgroup of its source page while we change it. */ if (!trylock_page(page)) goto out; @@ -5495,7 +5494,7 @@ void mem_cgroup_uncharge_list(struct list_head *page_list) } /** - * mem_cgroup_migrate - migrate a charge to another page + * mem_cgroup_replace_page - migrate a charge to another page * @oldpage: currently charged page * @newpage: page to transfer the charge to * @lrucare: either or both pages might be on the LRU already @@ -5504,16 +5503,13 @@ void mem_cgroup_uncharge_list(struct list_head *page_list) * * Both pages must be locked, @newpage->mapping must be set up. */ -void mem_cgroup_migrate(struct page *oldpage, struct page *newpage, - bool lrucare) +void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage) { struct mem_cgroup *memcg; int isolated; VM_BUG_ON_PAGE(!PageLocked(oldpage), oldpage); VM_BUG_ON_PAGE(!PageLocked(newpage), newpage); - VM_BUG_ON_PAGE(!lrucare && PageLRU(oldpage), oldpage); - VM_BUG_ON_PAGE(!lrucare && PageLRU(newpage), newpage); VM_BUG_ON_PAGE(PageAnon(oldpage) != PageAnon(newpage), newpage); VM_BUG_ON_PAGE(PageTransHuge(oldpage) != PageTransHuge(newpage), newpage); @@ -5525,25 +5521,16 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage, if (newpage->mem_cgroup) return; - /* - * Swapcache readahead pages can get migrated before being - * charged, and migration from compaction can happen to an - * uncharged page when the PFN walker finds a page that - * reclaim just put back on the LRU but has not released yet. - */ + /* Swapcache readahead pages can get replaced before being charged */ memcg = oldpage->mem_cgroup; if (!memcg) return; - if (lrucare) - lock_page_lru(oldpage, &isolated); - + lock_page_lru(oldpage, &isolated); oldpage->mem_cgroup = NULL; + unlock_page_lru(oldpage, isolated); - if (lrucare) - unlock_page_lru(oldpage, isolated); - - commit_charge(newpage, memcg, lrucare); + commit_charge(newpage, memcg, true); } /* diff --git a/mm/migrate.c b/mm/migrate.c index ed72c49..836e410 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -30,7 +30,6 @@ #include <linux/mempolicy.h> #include <linux/vmalloc.h> #include <linux/security.h> -#include <linux/memcontrol.h> #include <linux/syscalls.h> #include <linux/hugetlb.h> #include <linux/hugetlb_cgroup.h> @@ -1831,8 +1830,8 @@ fail_putback: } mlock_migrate_page(new_page, page); - mem_cgroup_migrate(page, new_page, false); - + set_page_memcg(new_page, page_memcg(page)); + set_page_memcg(page, NULL); page_remove_rmap(page); spin_unlock(ptl); @@ -1023,7 +1023,7 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp, */ oldpage = newpage; } else { - mem_cgroup_migrate(oldpage, newpage, true); + mem_cgroup_replace_page(oldpage, newpage); lru_cache_add_anon(newpage); *pagep = newpage; } |
