f2fs: add some tracepoints to debug volatile and atomic writes

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

3 files changed, 10 insertions, 0 deletions

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 486113db97b1..241b98741df9 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1287,9 +1287,11 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio)
                         need_inplace_update(inode))) {
                 rewrite_data_page(page, fio);
                 set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE);
+                trace_f2fs_do_write_data_page(page, IPU);
         } else {
                 write_data_page(page, &dn, fio);
                 f2fs_update_extent_cache(&dn);
+                trace_f2fs_do_write_data_page(page, OPU);
                 set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
                 if (page->index == 0)
                         set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9e378179ff93..c9818193e15e 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -556,6 +556,10 @@ enum page_type {
         META,
         NR_PAGE_TYPE,
         META_FLUSH,
+        INMEM,          /* the below types are used by tracepoints only. */
+        INMEM_DROP,
+        IPU,
+        OPU,
 };
 
 struct f2fs_io_info {
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index eafaf728236b..f939660941bb 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -205,6 +205,8 @@ retry:
         list_add_tail(&new->list, &fi->inmem_pages);
         inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES);
         mutex_unlock(&fi->inmem_lock);
+
+        trace_f2fs_register_inmem_page(page, INMEM);
 }
 
 void commit_inmem_pages(struct inode *inode, bool abort)
@@ -238,11 +240,13 @@ void commit_inmem_pages(struct inode *inode, bool abort)
                                 f2fs_wait_on_page_writeback(cur->page, DATA);
                                 if (clear_page_dirty_for_io(cur->page))
                                         inode_dec_dirty_pages(inode);
+                                trace_f2fs_commit_inmem_page(cur->page, INMEM);
                                 do_write_data_page(cur->page, &fio);
                                 submit_bio = true;
                         }
                         f2fs_put_page(cur->page, 1);
                 } else {
+                        trace_f2fs_commit_inmem_page(cur->page, INMEM_DROP);
                         put_page(cur->page);
                 }
                 radix_tree_delete(&fi->inmem_root, cur->page->index);