Re: kern/57870: umount hang (ld/sdmmc/rtsx)

[Rob Whitlock <rwhitlock22%gmail.com@localhost>]

> On Jan 22, 2024, at 5:35 PM, Taylor R Campbell <riastradh%NetBSD.org@localhost> wrote:
> 
> The following reply was made to PR kern/57870; it has been noted by GNATS.
> 
> From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
> To: Rob Whitlock <rwhitlock22%gmail.com@localhost>
> Cc: gnats-bugs%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost
> Subject: Re: kern/57870: umount hang (ld/sdmmc/rtsx)
> Date: Mon, 22 Jan 2024 22:31:54 +0000
> 
> This is a multi-part message in MIME format.
> --=_zuuYtksK0C8RJaF9J8AwVVP/KZSlw/L+
> 
> Can you please try to reproduce the deadlock with the attached patch?

The patch appears to work. The process no longer hangs when the SD card is removed while it is mounted. The patched kernel did hang on startup the first time I booted it up but I didn't manage to reproduce that on the next few boots. The last thing it printed was "Starting xdm." The fan was going so it may have been dumping core, but I didn't consider that and forcibly rebooted after a minute or two had passed, but perhaps that was not enough time. I would guess that this boot hang is unrelated to the SD card issue.

Thanks!