The patch titled
Subject: mm: convert swap_cluster_readahead and swap_vma_readahead to return a folio
has been added to the -mm mm-unstable branch. Its filename is
mm-convert-swap_cluster_readahead-and-swap_vma_readahead-to-return-a-folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-convert-swap_cluster_readahead-and-swap_vma_readahead-to-return-a-folio.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: convert swap_cluster_readahead and swap_vma_readahead to return a folio
Date: Wed, 13 Dec 2023 21:58:42 +0000
shmem_swapin_cluster() immediately converts the page back to a folio, and
swapin_readahead() may as well call folio_file_page() once instead of
having each function call it.
Link: https://lkml.kernel.org/r/20231213215842.671461-14-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/shmem.c | 8 +++-----
mm/swap.h | 6 +++---
mm/swap_state.c | 21 ++++++++++-----------
3 files changed, 16 insertions(+), 19 deletions(-)
--- a/mm/shmem.c~mm-convert-swap_cluster_readahead-and-swap_vma_readahead-to-return-a-folio
+++ a/mm/shmem.c
@@ -1569,15 +1569,13 @@ static struct folio *shmem_swapin_cluste
{
struct mempolicy *mpol;
pgoff_t ilx;
- struct page *page;
+ struct folio *folio;
mpol = shmem_get_pgoff_policy(info, index, 0, &ilx);
- page = swap_cluster_readahead(swap, gfp, mpol, ilx);
+ folio = swap_cluster_readahead(swap, gfp, mpol, ilx);
mpol_cond_put(mpol);
- if (!page)
- return NULL;
- return page_folio(page);
+ return folio;
}
/*
--- a/mm/swap.h~mm-convert-swap_cluster_readahead-and-swap_vma_readahead-to-return-a-folio
+++ a/mm/swap.h
@@ -52,8 +52,8 @@ struct folio *read_swap_cache_async(swp_
struct folio *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_flags,
struct mempolicy *mpol, pgoff_t ilx, bool *new_page_allocated,
bool skip_if_exists);
-struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t flag,
- struct mempolicy *mpol, pgoff_t ilx);
+struct folio *swap_cluster_readahead(swp_entry_t entry, gfp_t flag,
+ struct mempolicy *mpol, pgoff_t ilx);
struct page *swapin_readahead(swp_entry_t entry, gfp_t flag,
struct vm_fault *vmf);
@@ -80,7 +80,7 @@ static inline void show_swap_cache_info(
{
}
-static inline struct page *swap_cluster_readahead(swp_entry_t entry,
+static inline struct folio *swap_cluster_readahead(swp_entry_t entry,
gfp_t gfp_mask, struct mempolicy *mpol, pgoff_t ilx)
{
return NULL;
--- a/mm/swap_state.c~mm-convert-swap_cluster_readahead-and-swap_vma_readahead-to-return-a-folio
+++ a/mm/swap_state.c
@@ -620,7 +620,7 @@ static unsigned long swapin_nr_pages(uns
* @mpol: NUMA memory allocation policy to be applied
* @ilx: NUMA interleave index, for use only when MPOL_INTERLEAVE
*
- * Returns the struct page for entry and addr, after queueing swapin.
+ * Returns the struct folio for entry and addr, after queueing swapin.
*
* Primitive swap readahead code. We simply read an aligned block of
* (1 << page_cluster) entries in the swap area. This method is chosen
@@ -631,7 +631,7 @@ static unsigned long swapin_nr_pages(uns
* are used for every page of the readahead: neighbouring pages on swap
* are fairly likely to have been swapped out from the same node.
*/
-struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
+struct folio *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
struct mempolicy *mpol, pgoff_t ilx)
{
struct folio *folio;
@@ -683,7 +683,7 @@ skip:
if (unlikely(page_allocated))
swap_read_folio(folio, false, NULL);
zswap_folio_swapin(folio);
- return folio_file_page(folio, swp_offset(entry));
+ return folio;
}
int init_swap_address_space(unsigned int type, unsigned long nr_pages)
@@ -787,7 +787,7 @@ static void swap_ra_info(struct vm_fault
* @targ_ilx: NUMA interleave index, for use only when MPOL_INTERLEAVE
* @vmf: fault information
*
- * Returns the struct page for entry and addr, after queueing swapin.
+ * Returns the struct folio for entry and addr, after queueing swapin.
*
* Primitive swap readahead code. We simply read in a few pages whose
* virtual addresses are around the fault address in the same vma.
@@ -795,9 +795,8 @@ static void swap_ra_info(struct vm_fault
* Caller must hold read mmap_lock if vmf->vma is not NULL.
*
*/
-static struct page *swap_vma_readahead(swp_entry_t targ_entry, gfp_t gfp_mask,
- struct mempolicy *mpol, pgoff_t targ_ilx,
- struct vm_fault *vmf)
+static struct folio *swap_vma_readahead(swp_entry_t targ_entry, gfp_t gfp_mask,
+ struct mempolicy *mpol, pgoff_t targ_ilx, struct vm_fault *vmf)
{
struct blk_plug plug;
struct swap_iocb *splug = NULL;
@@ -859,7 +858,7 @@ skip:
if (unlikely(page_allocated))
swap_read_folio(folio, false, NULL);
zswap_folio_swapin(folio);
- return folio_file_page(folio, swp_offset(entry));
+ return folio;
}
/**
@@ -879,14 +878,14 @@ struct page *swapin_readahead(swp_entry_
{
struct mempolicy *mpol;
pgoff_t ilx;
- struct page *page;
+ struct folio *folio;
mpol = get_vma_policy(vmf->vma, vmf->address, 0, &ilx);
- page = swap_use_vma_readahead() ?
+ folio = swap_use_vma_readahead() ?
swap_vma_readahead(entry, gfp_mask, mpol, ilx, vmf) :
swap_cluster_readahead(entry, gfp_mask, mpol, ilx);
mpol_cond_put(mpol);
- return page;
+ return folio_file_page(folio, swp_offset(entry));
}
#ifdef CONFIG_SYSFS
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
buffer-return-bool-from-grow_dev_folio.patch
buffer-calculate-block-number-inside-folio_init_buffers.patch
buffer-fix-grow_buffers-for-block-size-page_size.patch
buffer-cast-block-to-loff_t-before-shifting-it.patch
buffer-fix-various-functions-for-block-size-page_size.patch
buffer-handle-large-folios-in-__block_write_begin_int.patch
buffer-fix-more-functions-for-block-size-page_size.patch
mm-convert-ksm_might_need_to_copy-to-work-on-folios.patch
mm-remove-pageanonexclusive-assertions-in-unuse_pte.patch
mm-convert-unuse_pte-to-use-a-folio-throughout.patch
mm-remove-some-calls-to-page_add_new_anon_rmap.patch
mm-remove-stale-example-from-comment.patch
mm-remove-references-to-page_add_new_anon_rmap-in-comments.patch
mm-convert-migrate_vma_insert_page-to-use-a-folio.patch
mm-convert-collapse_huge_page-to-use-a-folio.patch
mm-remove-page_add_new_anon_rmap-and-lru_cache_add_inactive_or_unevictable.patch
mm-return-the-folio-from-__read_swap_cache_async.patch
mm-pass-a-folio-to-__swap_writepage.patch
mm-pass-a-folio-to-swap_writepage_fs.patch
mm-pass-a-folio-to-swap_writepage_bdev_sync.patch
mm-pass-a-folio-to-swap_writepage_bdev_async.patch
mm-pass-a-folio-to-swap_readpage_fs.patch
mm-pass-a-folio-to-swap_readpage_bdev_sync.patch
mm-pass-a-folio-to-swap_readpage_bdev_async.patch
mm-convert-swap_page_sector-to-swap_folio_sector.patch
mm-convert-swap_readpage-to-swap_read_folio.patch
mm-remove-page_swap_info.patch
mm-return-a-folio-from-read_swap_cache_async.patch
mm-convert-swap_cluster_readahead-and-swap_vma_readahead-to-return-a-folio.patch
