So, if I understand you correctly, you are reporting a bug in which a jailed process is holding (the jailed instance of) /dev/null open and "umount -f" doesn't work on the jailed /dev ?
On 14/11/2011 23:52, Slono Slono wrote: > On one of servers where installed cacti in jail there is strange enough > situation. Sometimes processes poller.php haven't time to successful complete > until to beginning of the following session (absence of lock is other problem > - its ok) therefore processes breed yet won't begin them kill. During such > moments appear zombie processes. However, these zombie show that keep devfs > the device. Possibly because are started as > > php <path_to_poller>/poller.php 2>/dev/null 2>&1 > > Sending of any signals (SIGCHILD too) changes nothing. Strange that with -f > (force) optons through a umount command is impossible to unmount devfs with > which worked as the zombie. > > ps axf shows: > .. > > 99551 ?? DsJ 0:00.12 /usr/local/bin/php > /usr/local/share/cacti/poller.php > 99554 ?? ZJ 0:00.02 <defunct> > . > > lsof -p 99551 > COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME > php 99551 root cwd VBAD (revoked) > php 99551 root rtd VDIR 225,1035534442 3 678909 > /usr/jails/jails/mon > php 99551 root jld VDIR 225,1035534442 3 678909 > /usr/jails/jails/mon > php 99551 root txt VREG 225,1035534442 3261754 1620922 > /usr/jails/jails-data/mon-data/usr/local/bin/php > php 99551 root txt VREG 225,1035534442 246776 626780 > /usr/jails/jails-data/mon-data/libexec/ld-elf.so.1 > php 99551 root txt VREG 225,1035534442 33600 626862 > /usr/jails/jails-data/mon-data/lib/libcrypt.so.5 > php 99551 root txt VREG 225,1035534442 377814 1267501 > /usr/jails/jails-data/mon-data/usr/local/lib/libpcre.so.0 > php 99551 root txt VREG 225,1035534442 150656 626861 > /usr/jails/jails-data/mon-data/lib/libm.so.5 > php 99551 root txt VREG 225,1035534442 1495740 649173 > /usr/jails/jails-data/mon-data/usr/local/lib/libxml2.so.5 > php 99551 root txt VREG 225,1035534442 84848 626828 > /usr/jails/jails-data/mon-data/lib/libz.so.5 > php 99551 root txt VREG 225,1035534442 1074175 649584 > /usr/jails/jails-data/mon-data/usr/local/lib/libiconv.so.3 > php 99551 root txt VREG 225,1035534442 1270640 626857 > /usr/jails/jails-data/mon-data/lib/libc.so.7 > php 99551 root txt VREG 225,1035534442 74189 636259 > /usr/jails/jails-data/mon-data/usr/local/lib/php/20090626/session.so > php 99551 root txt VREG 225,1035534442 63195 637380 > /usr/jails/jails-data/mon-data/usr/local/lib/php/20090626/xml.so > php 99551 root txt VREG 225,1035534442 40650 638507 > /usr/jails/jails-data/mon-data/usr/local/lib/php/20090626/snmp.so > php 99551 root txt VREG 225,1035534442 337128 665903 > /usr/jails/jails-data/mon-data/usr/lib/libssl.so.6 > php 99551 root txt VREG 225,1035534442 730269 8050234 > /usr/jails/jails-data/mon-data/usr/local/lib/libnetsnmp.so.30 > php 99551 root txt VREG 225,1035534442 35264 626850 > /usr/jails/jails-data/mon-data/lib/libkvm.so.5 > php 99551 root txt VREG 225,1035534442 19720 626858 > /usr/jails/jails-data/mon-data/lib/libdevstat.so.7 > php 99551 root txt VREG 225,1035534442 1693344 626824 > /usr/jails/jails-data/mon-data/lib/libcrypto.so.6 > php 99551 root txt VREG 225,1035534442 105904 666224 > /usr/jails/jails-data/mon-data/usr/lib/libelf.so.1 > php 99551 root txt VREG 225,1035534442 61034 635955 > /usr/jails/jails-data/mon-data/usr/local/lib/php/20090626/mysql.so > php 99551 root txt VREG 225,1035534442 54114 637132 > /usr/jails/jails-data/mon-data/usr/local/lib/php/20090626/sockets.so > php 99551 root 0u PIPE 0xfffffe07514ab5b0 16384 > ->0xfffffe07514ab708 > php 99551 root 1w VCHR 0,27 0t0 27 > /usr/jails/jails/mon/dev (devfs) (like character special /dev/null) > php 99551 root 2w VCHR 0,27 0t0 27 > /usr/jails/jails/mon/dev (devfs) (like character special /dev/null) > php 99551 root 3u unix 0xfffffe074ad832a8 0t0 ->(none) > php 99551 root 5u PIPE 0xfffffe043c62fcb8 0 > ->0xfffffe043c62fb60 > > mount -t devfs |grep mon > devfs on /usr/jails/jails/mon/dev (devfs, local, multilabel) > > umount -f /usr/jails/jails/mon/dev > umount: unmount of /usr/jails/jails/mon/dev failed: Device busy > > However apparently devfs is unmount when executed jail stop: > > ls -la /usr/jails/jails/mon/dev > total 5 > drwxr-xr-x 2 root wheel 2 Nov 14 22:36 . > drwxr-xr-x 3 root wheel 3 Nov 14 22:36 .. > > As can be that zombie blocks devfs or that in system there is an information > on active mount when the file system isn't present > > PS: FreeBSD 9.0-RC2 amd64 > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org" >
signature.asc
Description: OpenPGP digital signature
