Hi, again! As sometimes happens, soon after I posted my help request, I found the answer! It turns out that 'gkrellmd' was using the statfs() call periodically on all of the mounted filesystems: this activity meant the kernel would never expire those mounts (like my cd) under autofs.
lsof did not catch this, since the statfs() is so brief. To find the cause, I went into single-user mode (telinit 1) and killed any daemon I did not recognise. I then started the autofs daemons (/etc/init.d/autofs start) and tested to see if the automount was expiring... it was! So one of the other daemons on my runlevel were causing the problem. I went through the first few daemons in /etc/rc5.d/ until I found that the problem came back with gkrellmd. Solution 1: disable gkrellmd ... quick fix. Solution 2: I patched gkrellmd to ignore non-NFS sub-mounts of autofs mounts. Works well, small patch, but I'll have to clean it a bit before submitting it to the bug-tracker. Hope this helps someone else with similar problems! On Fri, 20 Jan 2006, Stephen Benoit wrote: > Hello, everyone. > > I have been using autofs since Debian Potato. Among other things, I use > it to automount my cd/dvd drive and release/unmount it after 15 > idle seconds. When I switched from Debian Woody to Sarge, the automount > processes never expired the unused mount again. > > I have tried 3 different hosts on Sarge with the same effect whether I use > linux 2.6.15 with udev or 2.4.31 with devfs. I also tried using the older > autofs3 protocol, but since it made no difference, I am using autofs4. > > Packages used: > autofs 4.1.3+4.1.4beta2 > mount: 2.12p-4sarge1 > > Using lsof, the directory tree looks ununsed by any processes. Using > strace, the automount process sets the timeout by an ioctl(), but later > polling of the kernel by ioctl() always returns -EAGAIN, meaning nothing > is ready to be unmounted. > > I reduced my test setup to the simplest I could, even removing any > symlinks in the device or mountpoint: > > ---vvv---/tmp/myautofile---vvv--- > cdrw -fstype=auto,ro :/dev/scsi/host0/bus0/target0/lun0/cd > ---^^^---/tmp/myautofile---^^^--- > > # mkdir /tmp/remov > # automount --debug --pid-file=/var/run/autofs/_tmp_remov.pid --timeout=15 > /tmp/remov file /tmp/myautofile > > # ls /tmp/remov/cdrw/ > ... after mounting, shows directory of cdrw. > ... time passes, nothing is using the cd. > ... /tmp/remov/cdrw never unmounts. > > I welcome suggestions. Has there been a configuration change for > autofs between Woody and Sarge that I missed? > > Stephen Benoit > [EMAIL PROTECTED] > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > > > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
