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Message-ID: <20240416172900.244637-4-willy@infradead.org>
Date: Tue, 16 Apr 2024 18:28:56 +0100
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: "Theodore Ts'o" <tytso@....edu>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
Andreas Dilger <adilger.kernel@...ger.ca>,
linux-ext4@...r.kernel.org,
linux-fsdevel@...r.kernel.org
Subject: [PATCH 3/5] ext4: Convert ext4_mb_init_cache() to take a folio
All callers now have a folio, so convert this function from operating on
a page to operating on a folio. The folio is assumed to be a single page.
Signe-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
fs/ext4/mballoc.c | 37 +++++++++++++++++++------------------
1 file changed, 19 insertions(+), 18 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 761d8d15b205..50bdf3646d45 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1270,7 +1270,7 @@ static void mb_regenerate_buddy(struct ext4_buddy *e4b)
* for this page; do not hold this lock when calling this routine!
*/
-static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
+static int ext4_mb_init_cache(struct folio *folio, char *incore, gfp_t gfp)
{
ext4_group_t ngroups;
unsigned int blocksize;
@@ -1288,13 +1288,13 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
char *bitmap;
struct ext4_group_info *grinfo;
- inode = page->mapping->host;
+ inode = folio->mapping->host;
sb = inode->i_sb;
ngroups = ext4_get_groups_count(sb);
blocksize = i_blocksize(inode);
blocks_per_page = PAGE_SIZE / blocksize;
- mb_debug(sb, "init page %lu\n", page->index);
+ mb_debug(sb, "init folio %lu\n", folio->index);
groups_per_page = blocks_per_page >> 1;
if (groups_per_page == 0)
@@ -1309,9 +1309,9 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
} else
bh = &bhs;
- first_group = page->index * blocks_per_page / 2;
+ first_group = folio->index * blocks_per_page / 2;
- /* read all groups the page covers into the cache */
+ /* read all groups the folio covers into the cache */
for (i = 0, group = first_group; i < groups_per_page; i++, group++) {
if (group >= ngroups)
break;
@@ -1322,10 +1322,11 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
/*
* If page is uptodate then we came here after online resize
* which added some new uninitialized group info structs, so
- * we must skip all initialized uptodate buddies on the page,
+ * we must skip all initialized uptodate buddies on the folio,
* which may be currently in use by an allocating task.
*/
- if (PageUptodate(page) && !EXT4_MB_GRP_NEED_INIT(grinfo)) {
+ if (folio_test_uptodate(folio) &&
+ !EXT4_MB_GRP_NEED_INIT(grinfo)) {
bh[i] = NULL;
continue;
}
@@ -1349,7 +1350,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
err = err2;
}
- first_block = page->index * blocks_per_page;
+ first_block = folio->index * blocks_per_page;
for (i = 0; i < blocks_per_page; i++) {
group = (first_block + i) >> 1;
if (group >= ngroups)
@@ -1370,7 +1371,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
* above
*
*/
- data = page_address(page) + (i * blocksize);
+ data = folio_address(folio) + (i * blocksize);
bitmap = bh[group - first_group]->b_data;
/*
@@ -1385,8 +1386,8 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
if ((first_block + i) & 1) {
/* this is block of buddy */
BUG_ON(incore == NULL);
- mb_debug(sb, "put buddy for group %u in page %lu/%x\n",
- group, page->index, i * blocksize);
+ mb_debug(sb, "put buddy for group %u in folio %lu/%x\n",
+ group, folio->index, i * blocksize);
trace_ext4_mb_buddy_bitmap_load(sb, group);
grinfo->bb_fragments = 0;
memset(grinfo->bb_counters, 0,
@@ -1404,8 +1405,8 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
} else {
/* this is block of bitmap */
BUG_ON(incore != NULL);
- mb_debug(sb, "put bitmap for group %u in page %lu/%x\n",
- group, page->index, i * blocksize);
+ mb_debug(sb, "put bitmap for group %u in folio %lu/%x\n",
+ group, folio->index, i * blocksize);
trace_ext4_mb_bitmap_load(sb, group);
/* see comments in ext4_mb_put_pa() */
@@ -1423,7 +1424,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
incore = data;
}
}
- SetPageUptodate(page);
+ folio_mark_uptodate(folio);
out:
if (bh) {
@@ -1535,7 +1536,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group, gfp_t gfp)
}
folio = e4b.bd_bitmap_folio;
- ret = ext4_mb_init_cache(&folio->page, NULL, gfp);
+ ret = ext4_mb_init_cache(folio, NULL, gfp);
if (ret)
goto err;
if (!folio_test_uptodate(folio)) {
@@ -1554,7 +1555,7 @@ int ext4_mb_init_group(struct super_block *sb, ext4_group_t group, gfp_t gfp)
}
/* init buddy cache */
folio = e4b.bd_buddy_folio;
- ret = ext4_mb_init_cache(&folio->page, e4b.bd_bitmap, gfp);
+ ret = ext4_mb_init_cache(folio, e4b.bd_bitmap, gfp);
if (ret)
goto err;
if (!folio_test_uptodate(folio)) {
@@ -1643,7 +1644,7 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
goto err;
}
if (!folio_test_uptodate(folio)) {
- ret = ext4_mb_init_cache(&folio->page, NULL, gfp);
+ ret = ext4_mb_init_cache(folio, NULL, gfp);
if (ret) {
folio_unlock(folio);
goto err;
@@ -1686,7 +1687,7 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
goto err;
}
if (!folio_test_uptodate(folio)) {
- ret = ext4_mb_init_cache(&folio->page, e4b->bd_bitmap,
+ ret = ext4_mb_init_cache(folio, e4b->bd_bitmap,
gfp);
if (ret) {
folio_unlock(folio);
--
2.43.0
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