Mayor Martin Walsh was kept in the loop about Boston Calling’s problems with City Hall permits and union demands in 2014, one of his closest lieutenants testified Wednesday in the federal extortion trial of two other top aides.

Policy chief Joyce Linehan testified that she wrote to the mayor using private email to keep him informed.

Federal prosecutors presented one memo to jurors and another only in an exhibit to Linehan. In the latter, Linehan explained she told her boss about Crash Line Productions’ difficulty in obtaining a liquor license and a push from a labor union to hire workers for a September concert on City Hall Plaza.

“What I said in the memo was it wasn’t fair to ask them (Boston Calling) to hire more labor three weeks before the concert,” Linehan said in response to a prosecutor’s question during the eighth day of a trial of two City Hall officials.

Kenneth Brissette, the city’s tourism chief, and Tim Sullivan, the city’s director of intergovernmental relations, are accused of pressuring Crash Line to hire unneeded workers from the International Alliance of Theatrical Stage Workers Local 11.

Assistant U.S. Attorney Laura Kaplan pressed Linehan on her use of private emails with Walsh, asking Linehan if she frequently sent the mayor messages on his personal email about city business, but was cut off as a judge sustained a defense attorney’s repeated objections.

Linehan also testified that after a Crash Line organizer told her that Brissette had asked him to hire union labor, she went to Sullivan and asked him what the cost of adding Local 11 stagehands to the concert would be. Kaplan asked Linehan why she asked Sullivan about the cost, and if Sullivan should have been involved in the union labor discussion. Linehan said she didn’t know, and Kaplan quickly reminded her she was the chief of policy before moving on.

Under questioning by Brissette’s attorney, William Kettlewell, Linehan said she was unaware of any union labor requirements for City Hall Plaza events. And she said that while Boston Calling was being asked to hire union stagehands, she was not aware of any threats.

“Did you ever do anything to try and hinder or inhibit or stop Mr. Appel (Crash Line concert organizer Brian Appel) from getting the permits he wanted?” Kettlewell asked.

“No, I would say I did quite the opposite,” Linehan said.

Kettlewell presented the jury with an email exchange between Linehan and former Boston police Commissioner William Evans, in which Linehan asked if Evans could do anything regarding Crash Line’s frustrations in not getting approval from a Boston police captain for a liquor license. Evans responded that there were too many alcohol-related medical incidents at a previous Boston Calling concert.

It remains unclear whether Evans or Walsh will be called to testify. A judge told jurors the trial will continue at the beginning of next week.