Date: Mon, 19 Jul 2021 11:36:29 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: arch@FreeBSD.org Subject: led(9) blinking using dedicated thread Message-ID: <ae299d95-9967-b1e5-0da0-15326650c847@FreeBSD.org>
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I would like to change led(9) so that it invokes LED control methods from a thread rather rather than from a callout. This is to support LEDs behind USB and I2C where (common) implementations use sleeping waits. I have created a review request for the proposed change: https://reviews.freebsd.org/D31215 In the current version the thread is created at init time and is kept around forever. That could be changed to create the thread when a first blinking LED is configured. Also, the thread could be destroyed when a last "blinker" is removed. Alternatively, I am considering whether static (no blinking) LED state changes should also be done asynchronously via the thread. -- Andriy Gapon
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