Bug 197792

Summary:	When attempting to mount a filesystem read-only the system hangs.
Product:	Base System	Reporter:	Mark Redding <ictmanager>
Component:	bin	Assignee:	Fernando Apesteguía <fernape>
Status:	Closed Feedback Timeout
Severity:	Affects Only Me	CC:	fernape
Priority:	---
Version:	10.1-RELEASE
Hardware:	Any
OS:	Any

Description Mark Redding 2015-02-18 17:31:50 UTC

I have a number of machines that have a /usr partition mounted read-only upon startup. In order to apply patches to them I have to remount the partition read-write. After applying patches I then wish to remount read-only. This final step causes the system to become unresponsive.

# mount -o rw -u /usr
# freebsd-update fetch
# freebsd-update install
# mount -o ro -u /usr

My ssh session ceases to respond and I am unable to establish a new ssh session. Breaking out using Ctrl+Z and putting the command into the background does not allow me to use the existing session.

However, remotely, the machine can still be pinged.

Comment 1 Andriy Gapon freebsd_committer

2015-02-19 10:53:17 UTC

Try to obtain to a kernel stack trace of the mount process by using procstat -kk <pid>.

Comment 2 Fernando Apesteguía freebsd_committer

2023-01-24 16:25:14 UTC

This is not a FreeBSD supported release anymore.