f2fs: drop page cache after fs shutdown

Don't remain dirtied page cache in f2fs after shutdown, it can mitigate
memory pressure of whole system, in order to keep other modules working
properly.

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 097eadc..9c7596f 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -237,12 +237,15 @@ static int __f2fs_write_meta_page(struct page *page,
 
        trace_f2fs_writepage(page, META);
 
+       if (unlikely(f2fs_cp_error(sbi))) {
+               dec_page_count(sbi, F2FS_DIRTY_META);
+               unlock_page(page);
+               return 0;
+       }
        if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
                goto redirty_out;
        if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
                goto redirty_out;
-       if (unlikely(f2fs_cp_error(sbi)))
-               goto redirty_out;
 
        write_meta_page(sbi, page, io_type);
        dec_page_count(sbi, F2FS_DIRTY_META);

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index f428f7b..6cba74e 100644 (file)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1716,6 +1716,12 @@ static int __write_data_page(struct page *page, bool *submitted,
 
        trace_f2fs_writepage(page, DATA);
 
+       /* we should bypass data pages to proceed the kworkder jobs */
+       if (unlikely(f2fs_cp_error(sbi))) {
+               mapping_set_error(page->mapping, -EIO);
+               goto out;
+       }
+
        if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
                goto redirty_out;
 
@@ -1740,12 +1746,6 @@ write:
                        available_free_memory(sbi, BASE_CHECK))))
                goto redirty_out;
 
-       /* we should bypass data pages to proceed the kworkder jobs */
-       if (unlikely(f2fs_cp_error(sbi))) {
-               mapping_set_error(page->mapping, -EIO);
-               goto out;
-       }
-
        /* Dentry blocks are controlled by checkpoint */
        if (S_ISDIR(inode->i_mode)) {
                fio.need_lock = LOCK_DONE;

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index ea29314..833b46b 100644 (file)
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1340,10 +1340,14 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
 
        trace_f2fs_writepage(page, NODE);
 
+       if (unlikely(f2fs_cp_error(sbi))) {
+               dec_page_count(sbi, F2FS_DIRTY_NODES);
+               unlock_page(page);
+               return 0;
+       }
+
        if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
                goto redirty_out;
-       if (unlikely(f2fs_cp_error(sbi)))
-               goto redirty_out;
 
        /* get old block addr of this node page */
        nid = nid_of_node(page);
@@ -1580,12 +1584,6 @@ next_step:
                        struct page *page = pvec.pages[i];
                        bool submitted = false;
 
-                       if (unlikely(f2fs_cp_error(sbi))) {
-                               pagevec_release(&pvec);
-                               ret = -EIO;
-                               goto out;
-                       }
-
                        /*
                         * flushing sequence with step:
                         * 0. indirect nodes
@@ -1655,9 +1653,12 @@ continue_unlock:
                step++;
                goto next_step;
        }
-out:
+
        if (nwritten)
                f2fs_submit_merged_write(sbi, NODE);
+
+       if (unlikely(f2fs_cp_error(sbi)))
+               return -EIO;
        return ret;
 }