f2fs: skip ->writepages for {mete,node}_inode during recovery

Skip ->writepages in prior to ->writepage for {meta,node}_inode during
recovery, hence unneeded loop in ->writepages can be avoided.

Moreover, check SBI_POR_DOING earlier while writebacking pages.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 12559a4..954917d 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -269,6 +269,9 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
        struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
        long diff, written;
 
+       if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+               goto skip_write;
+
        /* collect a number of dirty meta pages and write together */
        if (wbc->for_kupdate ||
                get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 7d3af48..cffcfa8 100644 (file)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1492,6 +1492,9 @@ static int __write_data_page(struct page *page, bool *submitted,
 
        trace_f2fs_writepage(page, DATA);
 
+       if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+               goto redirty_out;
+
        if (page->index < end_index)
                goto write;
 
@@ -1505,8 +1508,6 @@ static int __write_data_page(struct page *page, bool *submitted,
 
        zero_user_segment(page, offset, PAGE_SIZE);
 write:
-       if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
-               goto redirty_out;
        if (f2fs_is_drop_cache(inode))
                goto out;
        /* we should not write 0'th page having journal header */
@@ -1754,6 +1755,10 @@ static int f2fs_write_data_pages(struct address_space *mapping,
        if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
                return 0;
 
+       /* during POR, we don't need to trigger writepage at all. */
+       if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+               goto skip_write;
+
        if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE &&
                        get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
                        available_free_memory(sbi, DIRTY_DENTS))
@@ -1763,10 +1768,6 @@ static int f2fs_write_data_pages(struct address_space *mapping,
        if (is_inode_flag_set(inode, FI_DO_DEFRAG))
                goto skip_write;
 
-       /* during POR, we don't need to trigger writepage at all. */
-       if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
-               goto skip_write;
-
        trace_f2fs_writepages(mapping->host, wbc, DATA);
 
        /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index f6f46be..fd57ffd 100644 (file)
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1687,6 +1687,9 @@ static int f2fs_write_node_pages(struct address_space *mapping,
        struct blk_plug plug;
        long diff;
 
+       if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+               goto skip_write;
+
        /* balancing f2fs's metadata in background */
        f2fs_balance_fs_bg(sbi);