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Revert: "f2fs: check last page index in cached bio to decide submission"

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There is one case that we can leave bio in f2fs, result in hanging
page writeback waiter.

Thread A				Thread B
- f2fs_write_cache_pages
 - f2fs_submit_page_write
 page #0 cached in bio #0 of cold log
 - f2fs_submit_page_write
 page #1 cached in bio #1 of warm log
					- f2fs_write_cache_pages
					 - f2fs_submit_page_write
					 bio is full, submit bio #1 contain page #1
 - f2fs_submit_merged_write_cond(, page #1)
 fail to submit bio #0 due to page #1 is not in any cached bios.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2018-09-27 23:41:16 +08:00 committed by Jaegeuk Kim
parent d440c52d31
commit bab475c541
5 changed files with 32 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/f2fs/checkpoint.c
View File

@ -276,8 +276,7 @@ static int __f2fs_write_meta_page(struct page *page,
dec_page_count(sbi, F2FS_DIRTY_META);
if (wbc->for_reclaim)
f2fs_submit_merged_write_cond(sbi, page->mapping->host,
0, page->index, META);
f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
unlock_page(page);

38
fs/f2fs/data.c
View File

@ -322,8 +322,8 @@ static void __submit_merged_bio(struct f2fs_bio_info *io)
io->bio = NULL;
}
static bool __has_merged_page(struct f2fs_bio_info *io,
struct inode *inode, nid_t ino, pgoff_t idx)
static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
struct page *page, nid_t ino)
{
struct bio_vec *bvec;
struct page *target;
@ -332,7 +332,7 @@ static bool __has_merged_page(struct f2fs_bio_info *io,
if (!io->bio)
return false;
if (!inode && !ino)
if (!inode && !page && !ino)
return true;
bio_for_each_segment_all(bvec, io->bio, i) {
@ -342,11 +342,10 @@ static bool __has_merged_page(struct f2fs_bio_info *io,
else
target = fscrypt_control_page(bvec->bv_page);
if (idx != target->index)
continue;
if (inode && inode == target->mapping->host)
return true;
if (page && page == target)
return true;
if (ino && ino == ino_of_node(target))
return true;
}
@ -355,7 +354,8 @@ static bool __has_merged_page(struct f2fs_bio_info *io,
}
static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
nid_t ino, pgoff_t idx, enum page_type type)
struct page *page, nid_t ino,
enum page_type type)
{
enum page_type btype = PAGE_TYPE_OF_BIO(type);
enum temp_type temp;
@ -366,7 +366,7 @@ static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
io = sbi->write_io[btype] + temp;
down_read(&io->io_rwsem);
ret = __has_merged_page(io, inode, ino, idx);
ret = __has_merged_page(io, inode, page, ino);
up_read(&io->io_rwsem);
/* TODO: use HOT temp only for meta pages now. */
@ -397,12 +397,12 @@ static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
}
static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
struct inode *inode, nid_t ino, pgoff_t idx,
enum page_type type, bool force)
struct inode *inode, struct page *page,
nid_t ino, enum page_type type, bool force)
{
enum temp_type temp;
if (!force && !has_merged_page(sbi, inode, ino, idx, type))
if (!force && !has_merged_page(sbi, inode, page, ino, type))
return;
for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
@ -421,10 +421,10 @@ void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
}
void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
struct inode *inode, nid_t ino, pgoff_t idx,
enum page_type type)
struct inode *inode, struct page *page,
nid_t ino, enum page_type type)
{
__submit_merged_write_cond(sbi, inode, ino, idx, type, false);
__submit_merged_write_cond(sbi, inode, page, ino, type, false);
}
void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
@ -1952,7 +1952,7 @@ static int __write_data_page(struct page *page, bool *submitted,
ClearPageUptodate(page);
if (wbc->for_reclaim) {
f2fs_submit_merged_write_cond(sbi, inode, 0, page->index, DATA);
f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
clear_inode_flag(inode, FI_HOT_DATA);
f2fs_remove_dirty_inode(inode);
submitted = NULL;
@ -2010,10 +2010,10 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
pgoff_t index;
pgoff_t end; /* Inclusive */
pgoff_t done_index;
pgoff_t last_idx = ULONG_MAX;
int cycled;
int range_whole = 0;
int tag;
int nwritten = 0;
pagevec_init(&pvec);
@ -2116,7 +2116,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
done = 1;
break;
} else if (submitted) {
last_idx = page->index;
nwritten++;
}
if (--wbc->nr_to_write <= 0 &&
@ -2138,9 +2138,9 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
mapping->writeback_index = done_index;
if (last_idx != ULONG_MAX)
if (nwritten)
f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
0, last_idx, DATA);
NULL, 0, DATA);
return ret;
}

4
fs/f2fs/f2fs.h
View File

@ -3032,8 +3032,8 @@ int f2fs_init_post_read_processing(void);
void f2fs_destroy_post_read_processing(void);
void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type);
void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
struct inode *inode, nid_t ino, pgoff_t idx,
enum page_type type);
struct inode *inode, struct page *page,
nid_t ino, enum page_type type);
void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi);
int f2fs_submit_page_bio(struct f2fs_io_info *fio);
void f2fs_submit_page_write(struct f2fs_io_info *fio);

11
fs/f2fs/node.c
View File

@ -1565,8 +1565,7 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
up_read(&sbi->node_write);
if (wbc->for_reclaim) {
f2fs_submit_merged_write_cond(sbi, page->mapping->host, 0,
page->index, NODE);
f2fs_submit_merged_write_cond(sbi, NULL, page, 0, NODE);
submitted = NULL;
}
@ -1631,13 +1630,13 @@ int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
unsigned int *seq_id)
{
pgoff_t index;
pgoff_t last_idx = ULONG_MAX;
struct pagevec pvec;
int ret = 0;
struct page *last_page = NULL;
bool marked = false;
nid_t ino = inode->i_ino;
int nr_pages;
int nwritten = 0;
if (atomic) {
last_page = last_fsync_dnode(sbi, ino);
@ -1715,7 +1714,7 @@ int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
f2fs_put_page(last_page, 0);
break;
} else if (submitted) {
last_idx = page->index;
nwritten++;
}
if (page == last_page) {
@ -1741,8 +1740,8 @@ int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
goto retry;
}
out:
if (last_idx != ULONG_MAX)
f2fs_submit_merged_write_cond(sbi, NULL, ino, last_idx, NODE);
if (nwritten)
f2fs_submit_merged_write_cond(sbi, NULL, NULL, ino, NODE);
return ret ? -EIO: 0;
}

11
fs/f2fs/segment.c
View File

@ -371,7 +371,7 @@ static int __f2fs_commit_inmem_pages(struct inode *inode)
.io_type = FS_DATA_IO,
};
struct list_head revoke_list;
pgoff_t last_idx = ULONG_MAX;
bool submit_bio = false;
int err = 0;
INIT_LIST_HEAD(&revoke_list);
@ -406,14 +406,14 @@ static int __f2fs_commit_inmem_pages(struct inode *inode)
}
/* record old blkaddr for revoking */
cur->old_addr = fio.old_blkaddr;
last_idx = page->index;
submit_bio = true;
}
unlock_page(page);
list_move_tail(&cur->list, &revoke_list);
}
if (last_idx != ULONG_MAX)
f2fs_submit_merged_write_cond(sbi, inode, 0, last_idx, DATA);
if (submit_bio)
f2fs_submit_merged_write_cond(sbi, inode, NULL, 0, DATA);
if (err) {
/*
@ -3181,8 +3181,7 @@ void f2fs_wait_on_page_writeback(struct page *page,
if (PageWriteback(page)) {
struct f2fs_sb_info *sbi = F2FS_P_SB(page);
f2fs_submit_merged_write_cond(sbi, page->mapping->host,
0, page->index, type);
f2fs_submit_merged_write_cond(sbi, NULL, page, 0, type);
if (ordered)
wait_on_page_writeback(page);
else