Bug 370051 – sys-apps/util-linux-2.19.1: `umount -l` hangs on unreachable mount points (e.g. dead nfs servers)

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Pacho Ramos 2011-06-04 17:25:05 UTC]

I don't understand why "umount -l ..." no longer works for me when nfs server is down.

Reproducible: Always

Steps to Reproduce:
1. Have /usr/distfiles mounted using nfs
2. Poweroff nfs server
3. /usr/distfiles cannot be unmounted neither using "-f" or "-l" option, it simply gets stalled.


Expected Results:  
/usr/distfiles should be unmounted when forcing it

Portage 2.1.9.50 (default/linux/amd64/10.0/desktop/gnome, gcc-4.4.5, glibc-2.12.2-r0, 2.6.39-gentoo x86_64)
=================================================================
System uname: Linux-2.6.39-gentoo-x86_64-AMD_Athlon-tm-_64_Processor_3200+-with-gentoo-2.0.2
Timestamp of tree: Fri, 03 Jun 2011 13:30:01 +0000
ccache version 2.4 [enabled]
app-shells/bash:          4.1_p9
dev-java/java-config:     2.1.11-r3
dev-lang/python:          2.7.1-r1, 3.1.3-r1
dev-util/ccache:          2.4-r9
dev-util/cmake:           2.8.4-r1
sys-apps/baselayout:      2.0.2
sys-apps/openrc:          0.8.2-r1
sys-apps/sandbox:         2.4
sys-devel/autoconf:       2.13, 2.68
sys-devel/automake:       1.9.6-r3, 1.10.3, 1.11.1
sys-devel/binutils:       2.20.1-r1
sys-devel/gcc:            4.4.5
sys-devel/gcc-config:     1.4.1-r1
sys-devel/libtool:        2.2.10
sys-devel/make:           3.82
sys-kernel/linux-headers: 2.6.36.1 (virtual/os-headers)
sys-libs/glibc:           2.12.2
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/usr/distfiles"
FEATURES="assume-digests binpkg-logs ccache distlocks fixlafiles fixpackages multilib-strict news parallel-fetch protect-owned sandbox sfperms sign split-log strict test test-fail-continue unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS=""
GENTOO_MIRRORS="ftp://ftp.free.fr/mirrors/ftp.gentoo.org http://ftp.ussg.iu.edu/linux/gentoo http://mirror.ovh.net/gentoo-distfiles/ http://ftp.heanet.ie/pub/gentoo/"
LANG="es_ES.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu"
LINGUAS="es es_ES en_US"
MAKEOPTS="-j2"
PKGDIR="/usr/local/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/portage/local/layman/sunrise /usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="3dnow 3dnowext X a52 aac acl acpi alsa amd64 applet avahi bash-completion berkdb branding bzip2 cairo cdda cddb cdinstall cdr cdrom cleartype cli consolekit cracklib crypt css cups cxx daap dbus djvu dri dts dvd dvdr dvi eds emboss encode evo exif fam fat ffmpeg firefox flac fortran fuse gdbm gdu gif git gnome gnome-keyring gpm gstreamer gtk hddtemp iconv java jpeg kpathsea latex lcdfilter lcms libnotify lm_sensors lyx lzma mad mmx mmxext mng modules mono mp3 mp4 mpeg mudflap multilib musicbrainz nautilus ncurses network network-cron nls nptl nptlonly ntfs nvidia ogg opengl openmp pam pango pch pcre pdf perl png policykit ppds pppd python qt3support qt4 readline reiserfs scanner sdl session sound spell sse sse2 sse3 ssl startup-notification subversion svg sysfs t1lib tcpd test threads tiff truetype udev unicode usb v4l2 vcd vorbis webkit x264 xattr xcb xml xmp xorg xpm xulrunner xv xvid zeroconf zlib" ALSA_CARDS="via82xx" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="braindump flow karbon kexi kpresenter krita tables words" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="es es_ES en_US" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="nvidia vesa" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" 
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

[Comment 1 Pacho Ramos 2011-06-04 17:25:35 UTC]

Created attachment 275815 [details]
fstab

[Comment 2 Pacho Ramos 2011-06-04 17:30:47 UTC]

It also causes # /etc/init.d/netmount stop
netmount             | * Unmounting network filesystems ...
netmount             |umount.nfs: /usr/distfiles: device is busy
netmount             | * Failed to simply unmount filesystems
netmount             | *   Unmounting /usr/distfiles ...
-> to get stalled here

[Comment 3 Pacho Ramos 2011-07-09 17:55:54 UTC]

Any news here? This is really annoying and causes me to need to hard poweroff sometimes :S

[Comment 4 SpanKY 2011-07-11 05:06:27 UTC]

has nothing to do with nfs-utils.  upstream util-linux has already fixed things in their git tree.

and the umount will eventually succeed.  you just werent patient enough ;).

commit b3b0c657818aa6191e6494f88d671601dd9d837d
Author: Petr Uzel <[e-mail]>
Date:   Wed Jun 29 10:24:09 2011 +0200
umount: do not hang with disconnected NFS mounts

[Comment 5 Pacho Ramos 2011-07-11 10:40:21 UTC]

Thanks a lot :)

[Comment 6 SpanKY 2011-07-12 03:31:42 UTC]

added the fix from upstream to 2.19.1-r1