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mm: convert free_pages_and_swap_cache() to use folios_put() 

Process the pages in batch-sized quantities instead of all-at-once.

Link: https://lkml.kernel.org/r/20240227174254.710559-17-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-02-27 17:42:50 +00:00 committed by Andrew Morton
parent f39ec4dcb9
commit 4907e80b76
1 changed files with 15 additions and 10 deletions
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25
mm/swap_state.c
View File

@ -15,6 +15,7 @@
#include <linux/swapops.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/pagevec.h>
#include <linux/backing-dev.h>
#include <linux/blkdev.h>
#include <linux/migrate.h>
@ -310,21 +311,25 @@ void free_page_and_swap_cache(struct page *page)
*/
void free_pages_and_swap_cache(struct encoded_page **pages, int nr)
{
lru_add_drain();
for (int i = 0; i < nr; i++) {
struct page *page = encoded_page_ptr(pages[i]);
struct folio_batch folios;
unsigned int refs[PAGEVEC_SIZE];
/*
* Skip over the "nr_pages" entry. It's sufficient to call
* free_swap_cache() only once per folio.
*/
lru_add_drain();
folio_batch_init(&folios);
for (int i = 0; i < nr; i++) {
struct folio *folio = page_folio(encoded_page_ptr(pages[i]));
free_swap_cache(&folio->page);
refs[folios.nr] = 1;
if (unlikely(encoded_page_flags(pages[i]) &
ENCODED_PAGE_BIT_NR_PAGES_NEXT))
i++;
refs[folios.nr] = encoded_nr_pages(pages[++i]);
free_swap_cache(page);
if (folio_batch_add(&folios, folio) == 0)
folios_put_refs(&folios, refs);
}
release_pages(pages, nr);
if (folios.nr)
folios_put_refs(&folios, refs);
}
static inline bool swap_use_vma_readahead(void)