mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

mm/swap: convert put_pages_list to use folios 

Pages linked through the LRU list cannot be tail pages as ->compound_head
is in a union with one of the words of the list_head, and they cannot
be ZONE_DEVICE pages as ->pgmap is in a union with the same word.
Saves 60 bytes of text by removing a call to page_is_fake_head().

Link: https://lkml.kernel.org/r/20220617175020.717127-15-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-06-17 18:50:12 +01:00 committed by akpm
parent ab5e653ee8
commit 2f58e5de66
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
mm/swap.c
View File

@ -138,19 +138,19 @@ EXPORT_SYMBOL(__put_page);
*/
void put_pages_list(struct list_head *pages)
{
struct page *page, *next;
struct folio *folio, *next;
list_for_each_entry_safe(page, next, pages, lru) {
if (!put_page_testzero(page)) {
list_del(&page->lru);
list_for_each_entry_safe(folio, next, pages, lru) {
if (!folio_put_testzero(folio)) {
list_del(&folio->lru);
continue;
}
if (PageHead(page)) {
list_del(&page->lru);
__put_compound_page(page);
if (folio_test_large(folio)) {
list_del(&folio->lru);
__put_compound_page(&folio->page);
continue;
}
/* Cannot be PageLRU because it's passed to us using the lru */
/* LRU flag must be clear because it's passed using the lru */
}
free_unref_page_list(pages);