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authorJaegeuk Kim <jaegeuk@kernel.org>2018-10-16 10:20:53 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2018-10-22 17:54:46 -0700
commit5f9abab42b60e67846cd13dafc6a61d70d7a2682 (patch)
tree6563b21f06403ce9a9773dc1556087bef7c79b3a /fs/f2fs
parent78efac537de33faab9a4302cc05a70bb4a8b3b63 (diff)
downloadlinux-5f9abab42b60e67846cd13dafc6a61d70d7a2682.tar.gz
f2fs: account read IOs and use IO counts for is_idle
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>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/data.c24
-rw-r--r--fs/f2fs/debug.c7
-rw-r--r--fs/f2fs/f2fs.h22
3 files changed, 44 insertions, 9 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 4b312b73d8a8..b5de10102775 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -52,6 +52,23 @@ static bool __is_cp_guaranteed(struct page *page)
return false;
}
+static enum count_type __read_io_type(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+
+ if (mapping) {
+ struct inode *inode = mapping->host;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (inode->i_ino == F2FS_META_INO(sbi))
+ return F2FS_RD_META;
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi))
+ return F2FS_RD_NODE;
+ }
+ return F2FS_RD_DATA;
+}
+
/* postprocessing steps for read bios */
enum bio_post_read_step {
STEP_INITIAL = 0,
@@ -82,6 +99,7 @@ static void __read_end_io(struct bio *bio)
} else {
SetPageUptodate(page);
}
+ dec_page_count(F2FS_P_SB(page), __read_io_type(page));
unlock_page(page);
}
if (bio->bi_private)
@@ -466,8 +484,8 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
bio_set_op_attrs(bio, fio->op, fio->op_flags);
- if (!is_read_io(fio->op))
- inc_page_count(fio->sbi, WB_DATA_TYPE(fio->page));
+ inc_page_count(fio->sbi, is_read_io(fio->op) ?
+ __read_io_type(page): WB_DATA_TYPE(fio->page));
__submit_bio(fio->sbi, bio, fio->type);
return 0;
@@ -598,6 +616,7 @@ static int f2fs_submit_page_read(struct inode *inode, struct page *page,
return -EFAULT;
}
ClearPageError(page);
+ inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
__submit_bio(F2FS_I_SB(inode), bio, DATA);
return 0;
}
@@ -1586,6 +1605,7 @@ submit_and_realloc:
if (bio_add_page(bio, page, blocksize, 0) < blocksize)
goto submit_and_realloc;
+ inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
ClearPageError(page);
last_block_in_bio = block_nr;
goto next_page;
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 026e10f30889..139b4d5c83d5 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -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,
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index f865c5ed965d..7f9cb0bba104 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -950,6 +950,9 @@ enum count_type {
F2FS_DIRTY_IMETA,
F2FS_WB_CP_DATA,
F2FS_WB_DATA,
+ F2FS_RD_DATA,
+ F2FS_RD_NODE,
+ F2FS_RD_META,
NR_COUNT_TYPE,
};
@@ -1392,11 +1395,6 @@ static inline unsigned int f2fs_time_to_wait(struct f2fs_sb_info *sbi,
return wait_ms;
}
-static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
-{
- return f2fs_time_over(sbi, type);
-}
-
/*
* Inline functions
*/
@@ -1787,7 +1785,9 @@ static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
atomic_inc(&sbi->nr_pages[count_type]);
if (count_type == F2FS_DIRTY_DATA || count_type == F2FS_INMEM_PAGES ||
- count_type == F2FS_WB_CP_DATA || count_type == F2FS_WB_DATA)
+ count_type == F2FS_WB_CP_DATA || count_type == F2FS_WB_DATA ||
+ count_type == F2FS_RD_DATA || count_type == F2FS_RD_NODE ||
+ count_type == F2FS_RD_META)
return;
set_sbi_flag(sbi, SBI_IS_DIRTY);
@@ -2124,6 +2124,15 @@ static inline struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi,
return bio_alloc(GFP_KERNEL, npages);
}
+static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
+{
+ if (get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_RD_NODE) ||
+ get_pages(sbi, F2FS_RD_META) || get_pages(sbi, F2FS_WB_DATA) ||
+ get_pages(sbi, F2FS_WB_CP_DATA))
+ return false;
+ return f2fs_time_over(sbi, type);
+}
+
static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,
unsigned long index, void *item)
{
@@ -3114,6 +3123,7 @@ struct f2fs_stat_info {
int free_nids, avail_nids, alloc_nids;
int total_count, utilization;
int bg_gc, nr_wb_cp_data, nr_wb_data;
+ int nr_rd_data, nr_rd_node, nr_rd_meta;
unsigned int io_skip_bggc, other_skip_bggc;
int nr_flushing, nr_flushed, flush_list_empty;
int nr_discarding, nr_discarded;