[f2fs-dev] [Bug 208565] There may be dead lock for cp_rwsem during checkpoint

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=208565

Jaegeuk Kim (jaegeuk@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jaegeuk@kernel.org

--- Comment #1 from Jaegeuk Kim (jaegeuk@kernel.org) ---
Thank you for the report.

I think this is valid point that we need to fix.
I'm testing a RFC patch like this. Thanks.

--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1926,8 +1926,12 @@ int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
                                goto continue_unlock;
                        }

-                       /* flush inline_data, if it's async context. */
-                       if (do_balance && is_inline_node(page)) {
+                       /* flush inline_data/inode, if it's async context. */
+                       if (!do_balance)
+                               goto write_node;
+
+                       /* flush inline_data */
+                       if (is_inline_node(page)) {
                                clear_inline_node(page);
                                unlock_page(page);
                                flush_inline_data(sbi, ino_of_node(page));
@@ -1940,7 +1944,7 @@ int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
                                if (flush_dirty_inode(page))
                                        goto lock_node;
                        }
-
+write_node:
                        f2fs_wait_on_page_writeback(page, NODE, true, true);

                        if (!clear_page_dirty_for_io(page))

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