xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

f2fs: account read IOs and use IO counts for is_idle

Browse Source 
This patch adds issued read IO counts which is under block layer.

Chao modified a bit, since:

Below race can cause reversed reference on F2FS_RD_DATA, there is
the same issue in f2fs_submit_page_bio(), fix them by relocate
__submit_bio() and inc_page_count.

Thread A			Thread B
- f2fs_write_begin
 - f2fs_submit_page_read
 - __submit_bio
				- f2fs_read_end_io
				 - __read_end_io
				 - dec_page_count(, F2FS_RD_DATA)
 - inc_page_count(, F2FS_RD_DATA)

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2018-10-16 10:20:53 -07:00
parent 78efac537d
commit 5f9abab42b
3 changed files with 44 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
fs/f2fs/debug.c
View File

@@ -55,6 +55,9 @@ static void update_general_status(struct f2fs_sb_info *sbi)
si->max_vw_cnt = atomic_read(&sbi->max_vw_cnt);
si->nr_wb_cp_data = get_pages(sbi, F2FS_WB_CP_DATA);
si->nr_wb_data = get_pages(sbi, F2FS_WB_DATA);
si->nr_rd_data = get_pages(sbi, F2FS_RD_DATA);
si->nr_rd_node = get_pages(sbi, F2FS_RD_NODE);
si->nr_rd_meta = get_pages(sbi, F2FS_RD_META);
if (SM_I(sbi) && SM_I(sbi)->fcc_info) {
si->nr_flushed =
atomic_read(&SM_I(sbi)->fcc_info->issued_flush);
@@ -371,7 +374,9 @@ 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, " - IO (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), "
seq_printf(s, " - IO_R (Data: %4d, Node: %4d, Meta: %4d\n",
si->nr_rd_data, si->nr_rd_node, si->nr_rd_meta);
seq_printf(s, " - IO_W (CP: %4d, Data: %4d, Flush: (%4d %4d %4d), "
"Discard: (%4d %4d)) cmd: %4d undiscard:%4u\n",
si->nr_wb_cp_data, si->nr_wb_data,
si->nr_flushing, si->nr_flushed,