All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org, willy@infradead.org,
	akpm@linux-foundation.org
Subject: [merged mm-stable] mm-convert-do_swap_page-to-use-a-folio.patch removed from -mm tree
Date: Mon, 03 Oct 2022 14:04:51 -0700	[thread overview]
Message-ID: <20221003210452.0DEF1C433C1@smtp.kernel.org> (raw)


The quilt patch titled
     Subject: mm: convert do_swap_page() to use a folio
has been removed from the -mm tree.  Its filename was
     mm-convert-do_swap_page-to-use-a-folio.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: mm: convert do_swap_page() to use a folio
Date: Fri, 2 Sep 2022 20:46:10 +0100

Removes quite a lot of calls to compound_head().

Link: https://lkml.kernel.org/r/20220902194653.1739778-15-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory.c |   57 ++++++++++++++++++++++++++++----------------------
 1 file changed, 33 insertions(+), 24 deletions(-)

--- a/mm/memory.c~mm-convert-do_swap_page-to-use-a-folio
+++ a/mm/memory.c
@@ -3724,6 +3724,7 @@ static vm_fault_t handle_pte_marker(stru
 vm_fault_t do_swap_page(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
+	struct folio *folio;
 	struct page *page = NULL, *swapcache;
 	struct swap_info_struct *si = NULL;
 	rmap_t rmap_flags = RMAP_NONE;
@@ -3768,19 +3769,23 @@ vm_fault_t do_swap_page(struct vm_fault
 
 	page = lookup_swap_cache(entry, vma, vmf->address);
 	swapcache = page;
+	if (page)
+		folio = page_folio(page);
 
 	if (!page) {
 		if (data_race(si->flags & SWP_SYNCHRONOUS_IO) &&
 		    __swap_count(entry) == 1) {
 			/* skip swapcache */
-			page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma,
-							vmf->address);
-			if (page) {
-				__SetPageLocked(page);
-				__SetPageSwapBacked(page);
+			folio = vma_alloc_folio(GFP_HIGHUSER_MOVABLE, 0,
+						vma, vmf->address, false);
+			page = &folio->page;
+			if (folio) {
+				__folio_set_locked(folio);
+				__folio_set_swapbacked(folio);
 
 				if (mem_cgroup_swapin_charge_page(page,
-					vma->vm_mm, GFP_KERNEL, entry)) {
+							vma->vm_mm, GFP_KERNEL,
+							entry)) {
 					ret = VM_FAULT_OOM;
 					goto out_page;
 				}
@@ -3788,20 +3793,21 @@ vm_fault_t do_swap_page(struct vm_fault
 
 				shadow = get_shadow_from_swap_cache(entry);
 				if (shadow)
-					workingset_refault(page_folio(page),
-								shadow);
+					workingset_refault(folio, shadow);
 
-				lru_cache_add(page);
+				folio_add_lru(folio);
 
 				/* To provide entry to swap_readpage() */
-				set_page_private(page, entry.val);
+				folio_set_swap_entry(folio, entry);
 				swap_readpage(page, true, NULL);
-				set_page_private(page, 0);
+				folio->private = NULL;
 			}
 		} else {
 			page = swapin_readahead(entry, GFP_HIGHUSER_MOVABLE,
 						vmf);
 			swapcache = page;
+			if (page)
+				folio = page_folio(page);
 		}
 
 		if (!page) {
@@ -3844,7 +3850,7 @@ vm_fault_t do_swap_page(struct vm_fault
 		 * swapcache, we need to check that the page's swap has not
 		 * changed.
 		 */
-		if (unlikely(!PageSwapCache(page) ||
+		if (unlikely(!folio_test_swapcache(folio) ||
 			     page_private(page) != entry.val))
 			goto out_page;
 
@@ -3859,6 +3865,7 @@ vm_fault_t do_swap_page(struct vm_fault
 			page = swapcache;
 			goto out_page;
 		}
+		folio = page_folio(page);
 
 		/*
 		 * If we want to map a page that's in the swapcache writable, we
@@ -3867,7 +3874,7 @@ vm_fault_t do_swap_page(struct vm_fault
 		 * pagevecs if required.
 		 */
 		if ((vmf->flags & FAULT_FLAG_WRITE) && page == swapcache &&
-		    !PageKsm(page) && !PageLRU(page))
+		    !folio_test_ksm(folio) && !folio_test_lru(folio))
 			lru_add_drain();
 	}
 
@@ -3881,7 +3888,7 @@ vm_fault_t do_swap_page(struct vm_fault
 	if (unlikely(!pte_same(*vmf->pte, vmf->orig_pte)))
 		goto out_nomap;
 
-	if (unlikely(!PageUptodate(page))) {
+	if (unlikely(!folio_test_uptodate(folio))) {
 		ret = VM_FAULT_SIGBUS;
 		goto out_nomap;
 	}
@@ -3894,14 +3901,14 @@ vm_fault_t do_swap_page(struct vm_fault
 	 * check after taking the PT lock and making sure that nobody
 	 * concurrently faulted in this page and set PG_anon_exclusive.
 	 */
-	BUG_ON(!PageAnon(page) && PageMappedToDisk(page));
-	BUG_ON(PageAnon(page) && PageAnonExclusive(page));
+	BUG_ON(!folio_test_anon(folio) && folio_test_mappedtodisk(folio));
+	BUG_ON(folio_test_anon(folio) && PageAnonExclusive(page));
 
 	/*
 	 * Check under PT lock (to protect against concurrent fork() sharing
 	 * the swap entry concurrently) for certainly exclusive pages.
 	 */
-	if (!PageKsm(page)) {
+	if (!folio_test_ksm(folio)) {
 		/*
 		 * Note that pte_swp_exclusive() == false for architectures
 		 * without __HAVE_ARCH_PTE_SWP_EXCLUSIVE.
@@ -3913,7 +3920,7 @@ vm_fault_t do_swap_page(struct vm_fault
 			 * swapcache -> certainly exclusive.
 			 */
 			exclusive = true;
-		} else if (exclusive && PageWriteback(page) &&
+		} else if (exclusive && folio_test_writeback(folio) &&
 			  data_race(si->flags & SWP_STABLE_WRITES)) {
 			/*
 			 * This is tricky: not all swap backends support
@@ -3956,7 +3963,8 @@ vm_fault_t do_swap_page(struct vm_fault
 	 * exposing them to the swapcache or because the swap entry indicates
 	 * exclusivity.
 	 */
-	if (!PageKsm(page) && (exclusive || page_count(page) == 1)) {
+	if (!folio_test_ksm(folio) &&
+	    (exclusive || folio_ref_count(folio) == 1)) {
 		if (vmf->flags & FAULT_FLAG_WRITE) {
 			pte = maybe_mkwrite(pte_mkdirty(pte), vma);
 			vmf->flags &= ~FAULT_FLAG_WRITE;
@@ -3976,16 +3984,17 @@ vm_fault_t do_swap_page(struct vm_fault
 	/* ksm created a completely new copy */
 	if (unlikely(page != swapcache && swapcache)) {
 		page_add_new_anon_rmap(page, vma, vmf->address);
-		lru_cache_add_inactive_or_unevictable(page, vma);
+		folio_add_lru_vma(folio, vma);
 	} else {
 		page_add_anon_rmap(page, vma, vmf->address, rmap_flags);
 	}
 
-	VM_BUG_ON(!PageAnon(page) || (pte_write(pte) && !PageAnonExclusive(page)));
+	VM_BUG_ON(!folio_test_anon(folio) ||
+			(pte_write(pte) && !PageAnonExclusive(page)));
 	set_pte_at(vma->vm_mm, vmf->address, vmf->pte, pte);
 	arch_do_swap_page(vma->vm_mm, vma, vmf->address, pte, vmf->orig_pte);
 
-	unlock_page(page);
+	folio_unlock(folio);
 	if (page != swapcache && swapcache) {
 		/*
 		 * Hold the lock to avoid the swap entry to be reused
@@ -4017,9 +4026,9 @@ out:
 out_nomap:
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
 out_page:
-	unlock_page(page);
+	folio_unlock(folio);
 out_release:
-	put_page(page);
+	folio_put(folio);
 	if (page != swapcache && swapcache) {
 		unlock_page(swapcache);
 		put_page(swapcache);
_

Patches currently in -mm which might be from willy@infradead.org are



                 reply	other threads:[~2022-10-03 21:05 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20221003210452.0DEF1C433C1@smtp.kernel.org \
    --to=akpm@linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mm-commits@vger.kernel.org \
    --cc=willy@infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.