diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 1ce13f69fbec..bb4b2fe8968d 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -49,6 +49,7 @@
 #include "truncate.h"
 
 #include <trace/events/ext4.h>
+#include <linux/delay.h>
 
 static __u32 ext4_inode_csum(struct inode *inode, struct ext4_inode *raw,
 			      struct ext4_inode_info *ei)
@@ -1261,6 +1262,9 @@ static int write_end_fn(handle_t *handle, struct inode *inode,
 	if (!buffer_mapped(bh) || buffer_freed(bh))
 		return 0;
 	set_buffer_uptodate(bh);
+	printk("%s:%d,jh:%px,bh:%px,begin sleep...\n", __func__, __LINE__, bh2jh(bh), bh);
+	mdelay(2000);
+	printk("%s:%d,jh:%px,bh:%px,end sleep...\n", __func__, __LINE__, bh2jh(bh), bh);
 	ret = ext4_handle_dirty_metadata(handle, NULL, bh);
 	clear_buffer_meta(bh);
 	clear_buffer_prio(bh);
@@ -4034,6 +4038,9 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
 		ret = ext4_update_disksize_before_punch(inode, offset, length);
 		if (ret)
 			goto out_dio;
+		printk("%s:%d,begin sleep...\n", __func__, __LINE__);
+		mdelay(3000);
+		printk("%s:%d,end sleep...\n", __func__, __LINE__);
 		truncate_pagecache_range(inode, first_block_offset,
 					 last_block_offset);
 	}
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 5b9408e3b370..f7a4db3835ee 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -25,6 +25,7 @@
 #include <linux/blkdev.h>
 #include <linux/bitops.h>
 #include <trace/events/jbd2.h>
+#include <linux/delay.h>
 
 /*
  * IO end handler for temporary buffer_heads handling writes to the journal.
@@ -511,6 +512,9 @@ void jbd2_journal_commit_transaction(journal_t *journal)
 	 */
 	while (commit_transaction->t_reserved_list) {
 		jh = commit_transaction->t_reserved_list;
+		printk("%s:%d,jh:%px,bh:%px,begin sleep...\n", __func__, __LINE__, jh, jh2bh(jh));
+		mdelay(5000);
+		printk("%s:%d,jh:%px,bh:%px,end sleep...\n", __func__, __LINE__, jh, jh2bh(jh));
 		JBUFFER_TRACE(jh, "reserved, unused: refile");
 		/*
 		 * A jbd2_journal_get_undo_access()+jbd2_journal_release_buffer() may
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index fcacafa4510d..9bad5d4b2a84 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -47,6 +47,7 @@
 
 #include <linux/uaccess.h>
 #include <asm/page.h>
+#include <linux/delay.h>
 
 #ifdef CONFIG_JBD2_DEBUG
 ushort jbd2_journal_enable_debug __read_mostly;
@@ -2993,6 +2994,11 @@ static void __journal_remove_journal_head(struct buffer_head *bh)
 	/* Unlink before dropping the lock */
 	bh->b_private = NULL;
 	jh->b_bh = NULL;	/* debug, really */
+	if (strcmp(current->comm, "fallocate") == 0 || strcmp(current->comm, "ln") == 0) {
+		printk("%s:%d,jh:%px,bh:%px,begin sleep...\n", __func__, __LINE__, jh, bh);
+		mdelay(10000);
+		printk("%s:%d,jh:%px,bh:%px,end sleep...\n", __func__, __LINE__, jh, bh);
+	}
 	clear_buffer_jbd(bh);
 }
 
-- 
2.25.1

// 创建软链接发生abort时的流程
symlinkat
  do_symlinkat
    vfs_symlink
      ext4_symlink
        __page_symlink
          pagecache_write_end
            ext4_journalled_write_end
              ext4_walk_page_buffers
                write_end_fn
                  ext4_handle_dirty_metadata
                    __ext4_handle_dirty_metadata
                      jbd2_journal_dirty_metadata
                        is_handle_aborted
                          is_journal_aborted
                            return journal->j_flags & JBD2_ABORT
                        return -EROFS
        goto err_drop_inode
        err_drop_inode:
        iput
          iput_final
            evict
              ext4_evict_inode
                truncate_inode_pages_final
                  truncate_inode_pages
                    truncate_inode_pages_range
                      truncate_cleanup_folio
                        folio_invalidate
                          ext4_journalled_invalidate_folio
                            __ext4_journalled_invalidate_folio
                              jbd2_jouranl_invalidate_folio
                                journal_unmap_buffer
                                  if (transaction == NULL) { // 条件不满足
                                  } else if (transaction == journal->j_committing_transaction) { // 条件也不满足
                                  } else {
                                  may_free = __dispose_buffer
                                    __jbd2_journal_unfile_buffer
                                      __jbd2_journal_temp_unlink_buffer
                                        case BJ_Reserved:
                                        list = &transaction->t_reserved_list
                                        __blist_del_buffer // 从 reserved 链表中删除
                                    jbd2_journal_put_journal_head
                                      if (!jh->b_jcount) // jh->b_jcount == 1
                                      jbd_unlock_bh_journal_head
                                zap_buffer:
                                write_unlock(&journal->j_state_lock)
                                jbd2_journal_put_journal_head
                                __journal_remove_journal_head
                                  jh->b_bh = NULL
                                  clear_buffer_jbd

// 日志提交流程
kthread
  // kthread_run(kjournald2, ...)
  kjournald2
    jbd2_journal_commit_transaction
      while (commit_transaction->t_reserved_list)
      // 这时 jh 已经从 reserved list 中删除
      jh = commit_transaction->t_reserved_list