[40/62] mm/slub: Convert on_freelist() to struct slab

Message ID	20211004134650.4031813-41-willy@infradead.org (mailing list archive)
State	New
Headers	show Return-Path: <SRS0=Fowb=OY=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4159061373 From: "Matthew Wilcox (Oracle)" <willy@infradead.org> To: linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Subject: [PATCH 40/62] mm/slub: Convert on_freelist() to struct slab Date: Mon, 4 Oct 2021 14:46:28 +0100 Message-Id: <20211004134650.4031813-41-willy@infradead.org> In-Reply-To: <20211004134650.4031813-1-willy@infradead.org> References: <20211004134650.4031813-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	Separate struct slab from struct page \| expand [00/62] Separate struct slab from struct page [01/62] mm: Convert page_to_section() to pgflags_section() [02/62] mm: Add pgflags_nid() [03/62] mm: Split slab into its own type [04/62] mm: Add account_slab() and unaccount_slab() [05/62] mm: Convert virt_to_cache() to use struct slab [06/62] mm: Convert __ksize() to struct slab [07/62] mm: Use struct slab in kmem_obj_info() [08/62] mm: Convert check_heap_object() to use struct slab [09/62] mm/slub: Convert process_slab() to take a struct slab [10/62] mm/slub: Convert detached_freelist to use a struct slab [11/62] mm/slub: Convert kfree() to use a struct slab [12/62] mm/slub: Convert __slab_free() to take a struct slab [13/62] mm/slub: Convert new_slab() to return a struct slab [14/62] mm/slub: Convert early_kmem_cache_node_alloc() to use struct slab [15/62] mm/slub: Convert kmem_cache_cpu to struct slab [16/62] mm/slub: Convert show_slab_objects() to struct slab [17/62] mm/slub: Convert validate_slab() to take a struct slab [18/62] mm/slub: Convert count_partial() to struct slab [19/62] mm/slub: Convert bootstrap() to struct slab [20/62] mm/slub: Convert __kmem_cache_do_shrink() to struct slab [21/62] mm/slub: Convert free_partial() to use struct slab [22/62] mm/slub: Convert list_slab_objects() to take a struct slab [23/62] mm/slub: Convert slab_alloc_node() to use a struct slab [24/62] mm/slub: Convert get_freelist() to take a struct slab [25/62] mm/slub: Convert node_match() to take a struct slab [26/62] mm/slub: Convert slab flushing to struct slab [27/62] mm/slub: Convert __unfreeze_partials to take a struct slab [28/62] mm/slub: Convert deactivate_slab() to take a struct slab [29/62] mm/slub: Convert acquire_slab() to take a struct page [30/62] mm/slub: Convert partial slab management to struct slab [31/62] mm/slub: Convert slab freeing to struct slab [32/62] mm/slub: Convert shuffle_freelist to struct slab [33/62] mm/slub: Remove struct page argument to next_freelist_entry() [34/62] mm/slub: Remove struct page argument from setup_object() [35/62] mm/slub: Convert freelist_corrupted() to struct slab [36/62] mm/slub: Convert full slab management to struct slab [37/62] mm/slub: Convert free_consistency_checks() to take a struct slab [38/62] mm/slub: Convert alloc_debug_processing() to struct slab [39/62] mm/slub: Convert check_object() to struct slab [40/62] mm/slub: Convert on_freelist() to struct slab [41/62] mm/slub: Convert check_slab() to struct slab [42/62] mm/slub: Convert check_valid_pointer() to struct slab [43/62] mm/slub: Convert object_err() to take a struct slab [44/62] mm/slub: Convert print_trailer() to struct slab [45/62] mm/slub: Convert slab_err() to take a struct slab [46/62] mm/slub: Convert print_page_info() to print_slab_info() [47/62] mm/slub: Convert trace() to take a struct slab [48/62] mm/slub: Convert cmpxchg_double_slab to struct slab [49/62] mm/slub: Convert get_map() and __fill_map() to struct slab [50/62] mm/slub: Convert slab_lock() and slab_unlock() to struct slab [51/62] mm/slub: Convert setup_page_debug() to setup_slab_debug() [52/62] mm/slub: Convert pfmemalloc_match() to take a struct slab [53/62] mm/slub: Remove pfmemalloc_match_unsafe() [54/62] mm: Convert slab to use struct slab [55/62] mm: Convert slob to use struct slab [56/62] mm: Convert slub to use struct slab [57/62] memcg: Convert object cgroups from struct page to struct slab [58/62] mm/kasan: Convert to struct slab [59/62] zsmalloc: Stop using slab fields in struct page [60/62] bootmem: Use page->index instead of page->freelist [61/62] iommu: Use put_pages_list [62/62] mm: Remove slab from struct page

Message ID

20211004134650.4031813-41-willy@infradead.org (mailing list archive)

State

New

Headers

DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4159061373
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: [PATCH 40/62] mm/slub: Convert on_freelist() to struct slab
Date: Mon,  4 Oct 2021 14:46:28 +0100
Message-Id: <20211004134650.4031813-41-willy@infradead.org>
In-Reply-To: <20211004134650.4031813-1-willy@infradead.org>
References: <20211004134650.4031813-1-willy@infradead.org>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Sender: owner-linux-mm@kvack.org
Precedence: bulk

Series

Separate struct slab from struct page | expand

Commit Message

Matthew Wilcox Oct. 4, 2021, 1:46 p.m. UTC

Improves type safety as well as pushing down calls to slab_page().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/slub.c | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index fd11ca47bce8..10db0ce7fe2a 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1111,29 +1111,29 @@  static int check_slab(struct kmem_cache *s, struct page *page)
 }
 
 /*
- * Determine if a certain object on a page is on the freelist. Must hold the
+ * Determine if a certain object in a slab is on the freelist. Must hold the
  * slab lock to guarantee that the chains are in a consistent state.
  */
-static int on_freelist(struct kmem_cache *s, struct page *page, void *search)
+static int on_freelist(struct kmem_cache *s, struct slab *slab, void *search)
 {
 	int nr = 0;
 	void *fp;
 	void *object = NULL;
 	int max_objects;
 
-	fp = page->freelist;
-	while (fp && nr <= page->objects) {
+	fp = slab->freelist;
+	while (fp && nr <= slab->objects) {
 		if (fp == search)
 			return 1;
-		if (!check_valid_pointer(s, page, fp)) {
+		if (!check_valid_pointer(s, slab_page(slab), fp)) {
 			if (object) {
-				object_err(s, page, object,
+				object_err(s, slab_page(slab), object,
 					"Freechain corrupt");
 				set_freepointer(s, object, NULL);
 			} else {
-				slab_err(s, page, "Freepointer corrupt");
-				page->freelist = NULL;
-				page->inuse = page->objects;
+				slab_err(s, slab_page(slab), "Freepointer corrupt");
+				slab->freelist = NULL;
+				slab->inuse = slab->objects;
 				slab_fix(s, "Freelist cleared");
 				return 0;
 			}
@@ -1144,20 +1144,20 @@  static int on_freelist(struct kmem_cache *s, struct page *page, void *search)
 		nr++;
 	}
 
-	max_objects = order_objects(compound_order(page), s->size);
+	max_objects = order_objects(slab_order(slab), s->size);
 	if (max_objects > MAX_OBJS_PER_PAGE)
 		max_objects = MAX_OBJS_PER_PAGE;
 
-	if (page->objects != max_objects) {
-		slab_err(s, page, "Wrong number of objects. Found %d but should be %d",
-			 page->objects, max_objects);
-		page->objects = max_objects;
+	if (slab->objects != max_objects) {
+		slab_err(s, slab_page(slab), "Wrong number of objects. Found %d but should be %d",
+			 slab->objects, max_objects);
+		slab->objects = max_objects;
 		slab_fix(s, "Number of objects adjusted");
 	}
-	if (page->inuse != page->objects - nr) {
-		slab_err(s, page, "Wrong object count. Counter is %d but counted were %d",
-			 page->inuse, page->objects - nr);
-		page->inuse = page->objects - nr;
+	if (slab->inuse != slab->objects - nr) {
+		slab_err(s, slab_page(slab), "Wrong object count. Counter is %d but counted were %d",
+			 slab->inuse, slab->objects - nr);
+		slab->inuse = slab->objects - nr;
 		slab_fix(s, "Object count adjusted");
 	}
 	return search == NULL;
@@ -1315,7 +1315,7 @@  static inline int free_consistency_checks(struct kmem_cache *s,
 		return 0;
 	}
 
-	if (on_freelist(s, slab_page(slab), object)) {
+	if (on_freelist(s, slab, object)) {
 		object_err(s, slab_page(slab), object, "Object already free");
 		return 0;
 	}
@@ -4959,7 +4959,7 @@  static void validate_slab(struct kmem_cache *s, struct slab *slab,
 
 	slab_lock(slab_page(slab), &flags);
 
-	if (!check_slab(s, slab_page(slab)) || !on_freelist(s, slab_page(slab), NULL))
+	if (!check_slab(s, slab_page(slab)) || !on_freelist(s, slab, NULL))
 		goto unlock;
 
 	/* Now we know that a valid freelist exists */

[40/62] mm/slub: Convert on_freelist() to struct slab

Commit Message

Patch