From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>, hughd@google.com
Subject: [PATCH 55/59] huge_memory: Convert split_huge_page_to_list() to use a folio
Date: Mon, 8 Aug 2022 20:34:23 +0100 [thread overview]
Message-ID: <20220808193430.3378317-56-willy@infradead.org> (raw)
In-Reply-To: <20220808193430.3378317-1-willy@infradead.org>
Saves many calls to compound_head().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
mm/huge_memory.c | 49 ++++++++++++++++++++++++------------------------
1 file changed, 24 insertions(+), 25 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 7b998f2083aa..431a3b7078c7 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2592,27 +2592,26 @@ bool can_split_folio(struct folio *folio, int *pextra_pins)
int split_huge_page_to_list(struct page *page, struct list_head *list)
{
struct folio *folio = page_folio(page);
- struct page *head = &folio->page;
- struct deferred_split *ds_queue = get_deferred_split_queue(head);
- XA_STATE(xas, &head->mapping->i_pages, head->index);
+ struct deferred_split *ds_queue = get_deferred_split_queue(&folio->page);
+ XA_STATE(xas, &folio->mapping->i_pages, folio->index);
struct anon_vma *anon_vma = NULL;
struct address_space *mapping = NULL;
int extra_pins, ret;
pgoff_t end;
bool is_hzp;
- VM_BUG_ON_PAGE(!PageLocked(head), head);
- VM_BUG_ON_PAGE(!PageCompound(head), head);
+ VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
+ VM_BUG_ON_FOLIO(!folio_test_large(folio), folio);
- is_hzp = is_huge_zero_page(head);
- VM_WARN_ON_ONCE_PAGE(is_hzp, head);
+ is_hzp = is_huge_zero_page(&folio->page);
+ VM_WARN_ON_ONCE_FOLIO(is_hzp, folio);
if (is_hzp)
return -EBUSY;
- if (PageWriteback(head))
+ if (folio_test_writeback(folio))
return -EBUSY;
- if (PageAnon(head)) {
+ if (folio_test_anon(folio)) {
/*
* The caller does not necessarily hold an mmap_lock that would
* prevent the anon_vma disappearing so we first we take a
@@ -2621,7 +2620,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
* is taken to serialise against parallel split or collapse
* operations.
*/
- anon_vma = page_get_anon_vma(head);
+ anon_vma = page_get_anon_vma(&folio->page);
if (!anon_vma) {
ret = -EBUSY;
goto out;
@@ -2630,7 +2629,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
mapping = NULL;
anon_vma_lock_write(anon_vma);
} else {
- mapping = head->mapping;
+ mapping = folio->mapping;
/* Truncated ? */
if (!mapping) {
@@ -2638,7 +2637,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
goto out;
}
- xas_split_alloc(&xas, head, compound_order(head),
+ xas_split_alloc(&xas, folio, folio_order(folio),
mapping_gfp_mask(mapping) & GFP_RECLAIM_MASK);
if (xas_error(&xas)) {
ret = xas_error(&xas);
@@ -2653,7 +2652,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
* but on 32-bit, i_size_read() takes an irq-unsafe seqlock,
* which cannot be nested inside the page tree lock. So note
* end now: i_size itself may be changed at any moment, but
- * head page lock is good enough to serialize the trimming.
+ * folio lock is good enough to serialize the trimming.
*/
end = DIV_ROUND_UP(i_size_read(mapping->host), PAGE_SIZE);
if (shmem_mapping(mapping))
@@ -2669,38 +2668,38 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
goto out_unlock;
}
- unmap_page(head);
+ unmap_page(&folio->page);
/* block interrupt reentry in xa_lock and spinlock */
local_irq_disable();
if (mapping) {
/*
- * Check if the head page is present in page cache.
- * We assume all tail are present too, if head is there.
+ * Check if the folio is present in page cache.
+ * We assume all tail are present too, if folio is there.
*/
xas_lock(&xas);
xas_reset(&xas);
- if (xas_load(&xas) != head)
+ if (xas_load(&xas) != folio)
goto fail;
}
/* Prevent deferred_split_scan() touching ->_refcount */
spin_lock(&ds_queue->split_queue_lock);
- if (page_ref_freeze(head, 1 + extra_pins)) {
- if (!list_empty(page_deferred_list(head))) {
+ if (folio_ref_freeze(folio, 1 + extra_pins)) {
+ if (!list_empty(page_deferred_list(&folio->page))) {
ds_queue->split_queue_len--;
- list_del(page_deferred_list(head));
+ list_del(page_deferred_list(&folio->page));
}
spin_unlock(&ds_queue->split_queue_lock);
if (mapping) {
- int nr = thp_nr_pages(head);
+ int nr = folio_nr_pages(folio);
- xas_split(&xas, head, thp_order(head));
- if (PageSwapBacked(head)) {
- __mod_lruvec_page_state(head, NR_SHMEM_THPS,
+ xas_split(&xas, folio, folio_order(folio));
+ if (folio_test_swapbacked(folio)) {
+ __lruvec_stat_mod_folio(folio, NR_SHMEM_THPS,
-nr);
} else {
- __mod_lruvec_page_state(head, NR_FILE_THPS,
+ __lruvec_stat_mod_folio(folio, NR_FILE_THPS,
-nr);
filemap_nr_thps_dec(mapping);
}
--
2.35.1
next prev parent reply other threads:[~2022-08-08 19:36 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-08 19:33 [PATCH 00/59] MM folio changes for 6.1 Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 01/59] mm: Fix VM_BUG_ON in __delete_from_swap_cache() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 02/59] shmem: Update folio if shmem_replace_page() updates the page Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 03/59] vmscan: Check folio_test_private(), not folio_get_private() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 04/59] mm/vmscan: Fix a lot of comments Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 05/59] mm: Add the first tail page to struct folio Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 06/59] mm: Reimplement folio_order() and folio_nr_pages() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 07/59] mm: Add split_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 08/59] mm: Add folio_add_lru_vma() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 09/59] shmem: Convert shmem_writepage() to use a folio throughout Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 10/59] shmem: Convert shmem_delete_from_page_cache() to take a folio Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 11/59] shmem: Convert shmem_replace_page() to use folios throughout Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 12/59] mm/swapfile: Remove page_swapcount() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 13/59] mm/swapfile: Convert try_to_free_swap() to folio_free_swap() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 14/59] mm/swap: Convert __read_swap_cache_async() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 15/59] mm/swap: Convert add_to_swap_cache() to take " Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 16/59] mm/swap: Convert put_swap_page() to put_swap_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 17/59] mm: Convert do_swap_page() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 18/59] mm: Convert do_swap_page()'s swapcache variable to " Matthew Wilcox (Oracle)
2022-08-11 2:28 ` Hugh Dickins
2022-08-08 19:33 ` [PATCH 19/59] memcg: Convert mem_cgroup_swapin_charge_page() to mem_cgroup_swapin_charge_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 20/59] shmem: Convert shmem_mfill_atomic_pte() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 21/59] shmem: Convert shmem_replace_page() to shmem_replace_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 22/59] swap: Add swap_cache_get_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 23/59] shmem: Eliminate struct page from shmem_swapin_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 24/59] shmem: Convert shmem_getpage_gfp() to shmem_get_folio_gfp() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 25/59] shmem: Convert shmem_fault() to use shmem_get_folio_gfp() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 26/59] shmem: Convert shmem_read_mapping_page_gfp() " Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 27/59] shmem: Add shmem_get_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 28/59] shmem: Convert shmem_get_partial_folio() to use shmem_get_folio() Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 29/59] shmem: Convert shmem_write_begin() " Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 30/59] shmem: Convert shmem_file_read_iter() " Matthew Wilcox (Oracle)
2022-08-08 19:33 ` [PATCH 31/59] shmem: Convert shmem_fallocate() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 32/59] shmem: Convert shmem_symlink() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 33/59] shmem: Convert shmem_get_link() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 34/59] khugepaged: Call shmem_get_folio() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 35/59] userfaultfd: Convert mcontinue_atomic_pte() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 36/59] shmem: Remove shmem_getpage() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 37/59] swapfile: Convert try_to_unuse() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 38/59] swapfile: Convert __try_to_reclaim_swap() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 39/59] swapfile: Convert unuse_pte_range() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 40/59] mm: Convert do_swap_page() to use swap_cache_get_folio() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 41/59] mm: Remove lookup_swap_cache() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 42/59] swap_state: Convert free_swap_cache() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 43/59] swap: Convert swap_writepage() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 44/59] mm: Convert do_wp_page() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 45/59] huge_memory: Convert do_huge_pmd_wp_page() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 46/59] madvise: Convert madvise_free_pte_range() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 47/59] uprobes: Use folios more widely in __replace_page() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 48/59] ksm: Use a folio in replace_page() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 49/59] mm: Convert do_swap_page() to use folio_free_swap() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 50/59] memcg: Convert mem_cgroup_swap_full() to take a folio Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 51/59] mm: Remove try_to_free_swap() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 52/59] rmap: Convert page_move_anon_rmap() to use a folio Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 53/59] migrate: Convert __unmap_and_move() to use folios Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 54/59] migrate: Convert unmap_and_move_huge_page() " Matthew Wilcox (Oracle)
2022-08-08 19:34 ` Matthew Wilcox (Oracle) [this message]
2022-08-08 19:34 ` [PATCH 56/59] huge_memory: Convert unmap_page() to unmap_folio() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 57/59] mm: Convert page_get_anon_vma() to folio_get_anon_vma() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 58/59] rmap: Remove page_unlock_anon_vma_read() Matthew Wilcox (Oracle)
2022-08-08 19:34 ` [PATCH 59/59] uprobes: Use new_folio in __replace_page() Matthew Wilcox (Oracle)
2022-08-11 2:17 ` [PATCH 00/59] MM folio changes for 6.1 Hugh Dickins
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