Date: Fri, 14 May 2021 09:06:17 +0000
From: Greg V <greg@unrelenting.technology>
To: Mark Millard <marklmi@yahoo.com>, Mark Millard via freebsd-current <freebsd-current@freebsd.org>, freebsd-arm <freebsd-arm@freebsd.org>, freebsd-current <freebsd-current@freebsd.org>
Subject: Re: FYI for aarch64 main [14] running a mid March version: I ended up with [usb{usbus2}] stuck at (near) 100% cpu
Message-ID: <35D1B891-3DBC-4B47-9A15-DE8E26CC2CDB@unrelenting.technology>
In-Reply-To: <F8475C15-FBE4-40D3-B3D3-1F7E5A671D86@yahoo.com>
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On May 14, 2021 5:59:48 AM UTC, Mark Millard via freebsd-current <freebsd-current@freebsd.org> wrote:
>The [usb{usbus2}] process eventually got stuck-busy, no
>more I/O:
>
>
>The system was a MACCHIATObin Double Shot.
I've noticed USB issues on the mcbin too.
In my experience uaudio was the most likely thing to freeze: sometimes when playing audio the whole USB stack would hang, IIRC only unplugging and reconnecting the hub would let USB I/O continue.
Looks like the XHCI hardware might not be fully stable here?? but I do wonder if we could possibly lack some recovery mechanisms for this situation that other OSes have.
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