diff options
| author | Fengnan Chang <changfengnan@vivo.com> | 2021-10-23 06:08:00 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-10-27 00:04:31 +0300 |
| commit | b368cc5e26341113453e7458f03cdfe0eeb84a40 (patch) | |
| tree | e4164fd66d5fd80b12188b193c662401b220f399 /fs/f2fs/data.c | |
| parent | 71f2c8206202584c644eef5ca7efe91fc8305c1f (diff) | |
| download | linux-b368cc5e26341113453e7458f03cdfe0eeb84a40.tar.xz | |
f2fs: compress: fix overwrite may reduce compress ratio unproperly
when overwrite only first block of cluster, since cluster is not full, it
will call f2fs_write_raw_pages when f2fs_write_multi_pages, and cause the
whole cluster become uncompressed eventhough data can be compressed.
this may will make random write bench score reduce a lot.
root# dd if=/dev/zero of=./fio-test bs=1M count=1
root# sync
root# echo 3 > /proc/sys/vm/drop_caches
root# f2fs_io get_cblocks ./fio-test
root# dd if=/dev/zero of=./fio-test bs=4K count=1 oflag=direct conv=notrunc
w/o patch:
root# f2fs_io get_cblocks ./fio-test
189
w/ patch:
root# f2fs_io get_cblocks ./fio-test
192
Signed-off-by: Fengnan Chang <changfengnan@vivo.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 84d5d6c387e0..74e1a350c1d8 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3040,6 +3040,10 @@ readd: need_readd = false; #ifdef CONFIG_F2FS_FS_COMPRESSION if (f2fs_compressed_file(inode)) { + void *fsdata = NULL; + struct page *pagep; + int ret2; + ret = f2fs_init_compress_ctx(&cc); if (ret) { done = 1; @@ -3058,27 +3062,23 @@ readd: if (unlikely(f2fs_cp_error(sbi))) goto lock_page; - if (f2fs_cluster_is_empty(&cc)) { - void *fsdata = NULL; - struct page *pagep; - int ret2; + if (!f2fs_cluster_is_empty(&cc)) + goto lock_page; - ret2 = f2fs_prepare_compress_overwrite( + ret2 = f2fs_prepare_compress_overwrite( inode, &pagep, page->index, &fsdata); - if (ret2 < 0) { - ret = ret2; - done = 1; - break; - } else if (ret2 && - !f2fs_compress_write_end(inode, - fsdata, page->index, - 1)) { - retry = 1; - break; - } - } else { - goto lock_page; + if (ret2 < 0) { + ret = ret2; + done = 1; + break; + } else if (ret2 && + (!f2fs_compress_write_end(inode, + fsdata, page->index, 1) || + !f2fs_all_cluster_page_loaded(&cc, + &pvec, i, nr_pages))) { + retry = 1; + break; } } #endif |