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Bug 19508 - Even in single-user mode /usr cannot be unmounted
Summary: Even in single-user mode /usr cannot be unmounted
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: All Linux
: High minor (vote)
Assignee: Martin Schlemmer (RETIRED)
Depends on:
Reported: 2003-04-17 17:17 UTC by Marc Ballarin
Modified: 2003-08-03 06:53 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Marc Ballarin 2003-04-17 17:17:59 UTC
Under Gentoo, it's not possible to unmount the /usr filesystem. The reason is,
that bash always uses the following files in /usr, keeping the filesystem busy:

/usr/lib/gconv/ (or similiar)

All these files are part of glibc.  While /usr/lib/gconv has a size of ~4.5M and
could easily fit in the root filesystem, locale-archive is over 18M in size.
It seems, that bash doesn't need gconv to run, since it works when I remove /usr
from fstab and reboot with the "single" option.

Reproducible: Always
Steps to Reproduce:
1.You need to have /usr on a separate partition/device
2. Switch to single user mode
3. try to umount /usr

Actual Results:  
umount: /usr: device is busy

Expected Results:  
/usr should have been unmounted
Comment 1 Martin Schlemmer (RETIRED) gentoo-dev 2003-04-21 15:53:00 UTC
Use sash ?
Comment 2 Martin Schlemmer (RETIRED) gentoo-dev 2003-04-27 21:41:15 UTC
Another alternative might be to compile bash without nls support.  I
however do not know if this is an idea that will be appreciated by all
Comment 3 Martin Schlemmer (RETIRED) gentoo-dev 2003-08-03 06:53:26 UTC
Moving /usr/lib/gconf is not a good idea i think.