diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-12-14 10:12:56 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2017-10-03 13:45:50 +0000 |
| commit | b3fcb70064065bd1aa2083d98a5ec711d099a1ee (patch) | |
| tree | bf6ce1c05c8d4257aa03c167485ff8ae154128fa /fs/f2fs/segment.c | |
| parent | 8ef4f0ca7b4d0cefe0f0b42af6106e6510f39ae6 (diff) | |
f2fs: support IO alignment for DATA and NODE writes
commit 0a595ebaaa6b53a2226d3fee2a2fd616ea5ba378 upstream.
This patch implements IO alignment by filling dummy blocks in DATA and NODE
write bios. If we can guarantee, for example, 32KB or 64KB for such the IOs,
we can eliminate underlying dummy page problem which FTL conducts in order to
close MLC or TLC partial written pages.
Note that,
- it requires "-o mode=lfs".
- IO size should be power of 2, not exceed BIO_MAX_PAGES, 256.
- read IO is still 4KB.
- do checkpoint at fsync, if dummy NODE page was written.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
| -rw-r--r-- | fs/f2fs/segment.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index e6d3f3d4b028..a7bb97826445 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1684,15 +1684,20 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page, static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio) { int type = __get_segment_type(fio->page, fio->type); + int err; if (fio->type == NODE || fio->type == DATA) mutex_lock(&fio->sbi->wio_mutex[fio->type]); - +reallocate: allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr, &fio->new_blkaddr, sum, type); /* writeout dirty page into bdev */ - f2fs_submit_page_mbio(fio); + err = f2fs_submit_page_mbio(fio); + if (err == -EAGAIN) { + fio->old_blkaddr = fio->new_blkaddr; + goto reallocate; + } if (fio->type == NODE || fio->type == DATA) mutex_unlock(&fio->sbi->wio_mutex[fio->type]); |