From: Gao Xiang <hsiangkao@linux.alibaba.com>
To: linux-erofs@lists.ozlabs.org
Cc: Gao Xiang <hsiangkao@linux.alibaba.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/6] erofs: convert z_erofs_onlinepage_.* to folios
Date: Tue, 5 Mar 2024 17:14:43 +0800 [thread overview]
Message-ID: <20240305091448.1384242-1-hsiangkao@linux.alibaba.com> (raw)
Online folios are locked file-backed folios which will eventually
keep decoded (e.g. decompressed) data of each inode for end users to
utilize. It may belong to a few pclusters and contain other data (e.g.
compressed data for inplace I/Os) temporarily in a time-sharing manner
to reduce memory footprints for low-ended storage devices with high
latencies under heary I/O pressure.
Apart from folio_end_read() usage, it's a straight-forward conversion.
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
---
Some trivial folio conversions for compressed inodes aiming for v6.9.
fs/erofs/zdata.c | 50 +++++++++++++++++++++---------------------------
1 file changed, 22 insertions(+), 28 deletions(-)
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index ff0aa72b0db3..5013fcd4965a 100644
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -117,46 +117,39 @@ static inline unsigned int z_erofs_pclusterpages(struct z_erofs_pcluster *pcl)
}
/*
- * bit 30: I/O error occurred on this page
- * bit 0 - 29: remaining parts to complete this page
+ * bit 30: I/O error occurred on this folio
+ * bit 0 - 29: remaining parts to complete this folio
*/
-#define Z_EROFS_PAGE_EIO (1 << 30)
+#define Z_EROFS_FOLIO_EIO (1 << 30)
-static inline void z_erofs_onlinepage_init(struct page *page)
+static void z_erofs_onlinefolio_init(struct folio *folio)
{
union {
atomic_t o;
- unsigned long v;
+ void *v;
} u = { .o = ATOMIC_INIT(1) };
- set_page_private(page, u.v);
- smp_wmb();
- SetPagePrivate(page);
+ folio->private = u.v; /* valid only if file-backed folio is locked */
}
-static inline void z_erofs_onlinepage_split(struct page *page)
+static void z_erofs_onlinefolio_split(struct folio *folio)
{
- atomic_inc((atomic_t *)&page->private);
+ atomic_inc((atomic_t *)&folio->private);
}
-static void z_erofs_onlinepage_endio(struct page *page, int err)
+static void z_erofs_onlinefolio_end(struct folio *folio, int err)
{
int orig, v;
- DBG_BUGON(!PagePrivate(page));
-
do {
- orig = atomic_read((atomic_t *)&page->private);
- v = (orig - 1) | (err ? Z_EROFS_PAGE_EIO : 0);
- } while (atomic_cmpxchg((atomic_t *)&page->private, orig, v) != orig);
+ orig = atomic_read((atomic_t *)&folio->private);
+ v = (orig - 1) | (err ? Z_EROFS_FOLIO_EIO : 0);
+ } while (atomic_cmpxchg((atomic_t *)&folio->private, orig, v) != orig);
- if (!(v & ~Z_EROFS_PAGE_EIO)) {
- set_page_private(page, 0);
- ClearPagePrivate(page);
- if (!(v & Z_EROFS_PAGE_EIO))
- SetPageUptodate(page);
- unlock_page(page);
- }
+ if (v & ~Z_EROFS_FOLIO_EIO)
+ return;
+ folio->private = 0;
+ folio_end_read(folio, !(v & Z_EROFS_FOLIO_EIO));
}
#define Z_EROFS_ONSTACK_PAGES 32
@@ -965,6 +958,7 @@ static int z_erofs_read_fragment(struct super_block *sb, struct page *page,
static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
struct page *page, bool ra)
{
+ struct folio *folio = page_folio(page);
struct inode *const inode = fe->inode;
struct erofs_map_blocks *const map = &fe->map;
const loff_t offset = page_offset(page);
@@ -973,7 +967,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
unsigned int cur, end, len, split;
int err = 0;
- z_erofs_onlinepage_init(page);
+ z_erofs_onlinefolio_init(folio);
split = 0;
end = PAGE_SIZE;
repeat:
@@ -1035,7 +1029,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
if (err)
goto out;
- z_erofs_onlinepage_split(page);
+ z_erofs_onlinefolio_split(folio);
if (fe->pcl->pageofs_out != (map->m_la & ~PAGE_MASK))
fe->pcl->multibases = true;
if (fe->pcl->length < offset + end - map->m_la) {
@@ -1056,7 +1050,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
goto repeat;
out:
- z_erofs_onlinepage_endio(page, err);
+ z_erofs_onlinefolio_end(folio, err);
return err;
}
@@ -1159,7 +1153,7 @@ static void z_erofs_fill_other_copies(struct z_erofs_decompress_backend *be,
cur += len;
}
kunmap_local(dst);
- z_erofs_onlinepage_endio(bvi->bvec.page, err);
+ z_erofs_onlinefolio_end(page_folio(bvi->bvec.page), err);
list_del(p);
kfree(bvi);
}
@@ -1316,7 +1310,7 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be,
/* recycle all individual short-lived pages */
if (z_erofs_put_shortlivedpage(be->pagepool, page))
continue;
- z_erofs_onlinepage_endio(page, err);
+ z_erofs_onlinefolio_end(page_folio(page), err);
}
if (be->decompressed_pages != be->onstack_pages)
--
2.39.3
next reply other threads:[~2024-03-05 9:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 9:14 Gao Xiang [this message]
2024-03-05 9:14 ` [PATCH 2/6] erofs: convert z_erofs_do_read_page() to folios Gao Xiang
2024-03-10 1:04 ` Chao Yu
2024-03-05 9:14 ` [PATCH 3/6] erofs: get rid of `justfound` debugging tag Gao Xiang
2024-03-10 1:05 ` Chao Yu
2024-03-05 9:14 ` [PATCH 4/6] erofs: convert z_erofs_fill_bio_vec() to folios Gao Xiang
2024-03-10 1:07 ` Chao Yu
2024-03-05 9:14 ` [PATCH 5/6] erofs: convert z_erofs_submissionqueue_endio() " Gao Xiang
2024-03-10 1:07 ` Chao Yu
2024-03-05 9:14 ` [PATCH 6/6] erofs: refine managed cache operations " Gao Xiang
2024-03-10 1:09 ` Chao Yu
2024-03-10 1:03 ` [PATCH 1/6] erofs: convert z_erofs_onlinepage_.* " Chao Yu
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