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f2fs: introduce io_list for serialize data/node IOs

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Serialize data/node IOs by using fifo list instead of mutex lock,
it will help to enhance concurrency of f2fs, meanwhile keeping LFS
IO semantics.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2017-05-19 23:37:01 +08:00
committed by Jaegeuk Kim
parent e41e6d75e5
commit fb830fc5cf
6 changed files with 46 additions and 13 deletions
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22
fs/f2fs/segment.c
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@@ -2109,7 +2109,8 @@ static int __get_segment_type(struct f2fs_io_info *fio)
void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
block_t old_blkaddr, block_t *new_blkaddr,
struct f2fs_summary *sum, int type)
struct f2fs_summary *sum, int type,
struct f2fs_io_info *fio, bool add_list)
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, type);
@@ -2145,6 +2146,17 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
if (page && IS_NODESEG(type))
fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
if (add_list) {
struct f2fs_bio_info *io;
INIT_LIST_HEAD(&fio->list);
fio->in_list = true;
io = sbi->write_io[fio->type] + fio->temp;
spin_lock(&io->io_lock);
list_add_tail(&fio->list, &io->io_list);
spin_unlock(&io->io_lock);
}
mutex_unlock(&curseg->curseg_mutex);
}
@@ -2153,11 +2165,9 @@ static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
int type = __get_segment_type(fio);
int err;
if (fio->type == NODE || fio->type == DATA)
mutex_lock(&fio->sbi->wio_mutex[fio->type][fio->temp]);
reallocate:
allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
&fio->new_blkaddr, sum, type);
&fio->new_blkaddr, sum, type, fio, true);
/* writeout dirty page into bdev */
err = f2fs_submit_page_write(fio);
@@ -2165,9 +2175,6 @@ reallocate:
fio->old_blkaddr = fio->new_blkaddr;
goto reallocate;
}
if (fio->type == NODE || fio->type == DATA)
mutex_unlock(&fio->sbi->wio_mutex[fio->type][fio->temp]);
}
void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
@@ -2181,6 +2188,7 @@ void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
.new_blkaddr = page->index,
.page = page,
.encrypted_page = NULL,
.in_list = false,
};
if (unlikely(page->index >= MAIN_BLKADDR(sbi)))