Re: [PATCH 1/1] serial/uuc_uart: Set shutdown timeout to CONFIG_HZ independent 2ms
From: Alexander Stein <hidden>
Date: 2016-12-06 07:36:27
Also in:
linux-serial
From: Alexander Stein <hidden>
Date: 2016-12-06 07:36:27
Also in:
linux-serial
On Monday 05 December 2016 10:04:27, Timur Tabi wrote:
Alexander Stein wrote:quoted
- schedule_timeout(2); + schedule_timeout(msecs_to_jiffies(2));NACK. So I don't remember why I wrote this code, but I don't think I was expecting it to be 2ms. Instead, I think I just wanted it to be some delay, but I believed that schedule_timeout(1) was too short or would be "optimized" out somehow. Note that right below this, I do: if (qe_port->wait_closing) { /* Wait a bit longer */ set_current_state(TASK_UNINTERRUPTIBLE); schedule_timeout(qe_port->wait_closing); } And wait_closing is a number of jiffies, so I knew that schedule_timeout() took jiffies as a parameter. So I think I'm going to NACK this patch, since I believe I knew what I was doing when I wrote it five years ago.
Okay, I was just wondering why the timeout is dependant on the timer tick. That didn't seem obvious to me. Rethinking about this, I would rather replace those lines with msleep instead. Best regards, Alexander