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| author | Chao Yu <yuchao0@huawei.com> | 2016-11-16 05:41:20 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-11-25 21:15:59 +0300 |
| commit | 36951b38d13ac7cce9fcf89e0e01c22ed0d05688 (patch) | |
| tree | 1d04f0c34e4f80b65a1957c6a7ce0e865bc927a3 /fs/f2fs/checkpoint.c | |
| parent | c79b7ff1d3c7710c23d8828a69d8cbc5597ad19f (diff) | |
| download | linux-36951b38d13ac7cce9fcf89e0e01c22ed0d05688.tar.xz | |
f2fs: don't wait writeback for datas during checkpoint
Normally, while committing checkpoint, we will wait on all pages to be
writebacked no matter the page is data or metadata, so in scenario where
there are lots of data IO being submitted with metadata, we may suffer
long latency for waiting writeback during checkpoint.
Indeed, we only care about persistence for pages with metadata, but not
pages with data, as file system consistent are only related to metadate,
so in order to avoid encountering long latency in above scenario, let's
recognize and reference metadata in submitted IOs, wait writeback only
for metadatas.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/checkpoint.c')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index e5677e4a69d6..54cc6a9a0d30 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -1002,7 +1002,7 @@ static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi) for (;;) { prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE); - if (!atomic_read(&sbi->nr_wb_bios)) + if (!get_pages(sbi, F2FS_WB_CP_DATA)) break; io_schedule_timeout(5*HZ); |