Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-29 15:41:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

memcg: use a folio in get_mctgt_type

Browse Source 
Replace seven calls to compound_head() with one.  We still use the page as
page_mapped() is different from folio_mapped().

Link: https://lkml.kernel.org/r/20240111181219.3462852-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-01-11 18:12:18 +00:00 committed by Andrew Morton
parent b46777da7d
commit b67fa6e47b
1 changed files with 13 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
mm/memcontrol.c
View File

@ -6109,6 +6109,7 @@ static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
unsigned long addr, pte_t ptent, union mc_target *target) unsigned long addr, pte_t ptent, union mc_target *target)
{ {
struct page *page = NULL; struct page *page = NULL;
struct folio *folio;
enum mc_target_type ret = MC_TARGET_NONE; enum mc_target_type ret = MC_TARGET_NONE;
swp_entry_t ent = { .val = 0 }; swp_entry_t ent = { .val = 0 };
@ -6123,9 +6124,11 @@ static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
else if (is_swap_pte(ptent)) else if (is_swap_pte(ptent))
page = mc_handle_swap_pte(vma, ptent, &ent); page = mc_handle_swap_pte(vma, ptent, &ent);
if (page)
folio = page_folio(page);
if (target && page) { if (target && page) {
if (!trylock_page(page)) { if (!folio_trylock(folio)) {
put_page(page); folio_put(folio);
return ret; return ret;
} }
/* /*
@ -6140,8 +6143,8 @@ static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
* Alas, skip moving the page in this case. * Alas, skip moving the page in this case.
*/ */
if (!pte_present(ptent) && page_mapped(page)) { if (!pte_present(ptent) && page_mapped(page)) {
unlock_page(page); folio_unlock(folio);
put_page(page); folio_put(folio);
return ret; return ret;
} }
} }
@ -6154,18 +6157,18 @@ static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
* mem_cgroup_move_account() checks the page is valid or * mem_cgroup_move_account() checks the page is valid or
* not under LRU exclusion. * not under LRU exclusion.
*/ */
if (page_memcg(page) == mc.from) { if (folio_memcg(folio) == mc.from) {
ret = MC_TARGET_PAGE; ret = MC_TARGET_PAGE;
if (is_device_private_page(page) || if (folio_is_device_private(folio) ||
is_device_coherent_page(page)) folio_is_device_coherent(folio))
ret = MC_TARGET_DEVICE; ret = MC_TARGET_DEVICE;
if (target) if (target)
target->folio = page_folio(page); target->folio = folio;
} }
if (!ret || !target) { if (!ret || !target) {
if (target) if (target)
unlock_page(page); folio_unlock(folio);
put_page(page); folio_put(folio);
} }
} }
/* /*