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authorChao Yu <yuchao0@huawei.com>2016-11-16 10:41:20 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2016-11-25 10:15:59 -0800
commit36951b38d13ac7cce9fcf89e0e01c22ed0d05688 (patch)
tree1d04f0c34e4f80b65a1957c6a7ce0e865bc927a3 /fs/f2fs/debug.c
parentc79b7ff1d3c7710c23d8828a69d8cbc5597ad19f (diff)
downloadlinux-36951b38d13ac7cce9fcf89e0e01c22ed0d05688.tar.bz2
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/debug.c')
-rw-r--r--fs/f2fs/debug.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 2fdf23398fa1..67a04d8074bb 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -50,7 +50,8 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->ndirty_files = sbi->ndirty_inode[FILE_INODE];
si->ndirty_all = sbi->ndirty_inode[DIRTY_META];
si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
- si->wb_bios = atomic_read(&sbi->nr_wb_bios);
+ si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
+ si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg;
si->rsvd_segs = reserved_segments(sbi);
si->overp_segs = overprovision_segments(sbi);
@@ -313,8 +314,8 @@ static int stat_show(struct seq_file *s, void *v)
seq_printf(s, " - Inner Struct Count: tree: %d(%d), node: %d\n",
si->ext_tree, si->zombie_tree, si->ext_node);
seq_puts(s, "\nBalancing F2FS Async:\n");
- seq_printf(s, " - inmem: %4d, wb_bios: %4d\n",
- si->inmem_pages, si->wb_bios);
+ seq_printf(s, " - inmem: %4d, wb_cp_data: %4d, wb_data: %4d\n",
+ si->inmem_pages, si->nr_wb_cp_data, si->nr_wb_data);
seq_printf(s, " - nodes: %4d in %4d\n",
si->ndirty_node, si->node_pages);
seq_printf(s, " - dents: %4d in dirs:%4d (%4d)\n",