Bug 437404

Summary:	ZFS txg_sync kernel thread hung during scrub
Product:	Gentoo Linux	Reporter:	Cory Coager <ccoager>
Component:	[OLD] Core system	Assignee:	Richard Yao (RETIRED) <ryao>
Status:	RESOLVED UPSTREAM
Severity:	major	Keywords:	Bug
Priority:	Normal
Version:	unspecified
Hardware:	AMD64
OS:	Linux
URL:	https://github.com/zfsonlinux/zfs/issues/1021
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	dmesg

Description Cory Coager 2012-10-06 13:54:38 UTC

I kicked off a ZFS scrub and let it run overnight for about 10 hours.  I noticed multiple kernel messages in dmesg the next morning and the scrub never finished.

Reproducible: Didn't try

Steps to Reproduce:
1. zpool scrub rpool
2. <wait>
3. Watch dmesg
Actual Results:  
See attached log.

Expected Results:  
No kernel messages should appear in dmesg.

Portage 2.1.11.9 (hardened/linux/amd64, gcc-4.6.3, glibc-2.15-r2, 3.4.5-hardened x86_64)
=================================================================
System uname: Linux-3.4.5-hardened-x86_64-AMD_FX-tm-4100_Quad-Core_Processor-with-gentoo-2.1
Timestamp of tree: Sat, 06 Oct 2012 04:00:01 +0000
distcc 3.1 x86_64-pc-linux-gnu [disabled]
ccache version 3.1.7 [enabled]
app-shells/bash:          4.2_p37
dev-lang/python:          2.7.3-r2, 3.2.3
dev-util/ccache:          3.1.7
dev-util/cmake:           2.8.8-r3
dev-util/pkgconfig:       0.27.1
sys-apps/baselayout:      2.1-r1
sys-apps/openrc:          0.10.5
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.13, 2.68
sys-devel/automake:       1.9.6-r3, 1.11.6
sys-devel/binutils:       2.22-r1
sys-devel/gcc:            4.6.3
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4-r1
sys-devel/make:           3.82-r3
sys-kernel/linux-headers: 3.4-r2 (virtual/os-headers)
sys-libs/glibc:           2.15-r2
Repositories: gentoo
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=bdver1 -mno-movbe -mno-fma -mno-bmi -mno-tbm --param l1-cache-size=16 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=bdver1 -fomit-frame-pointer -D_FORTIFY_SOURCE=2"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -march=bdver1 -mno-movbe -mno-fma -mno-bmi -mno-tbm --param l1-cache-size=16 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=bdver1 -fomit-frame-pointer -D_FORTIFY_SOURCE=2"
DISTDIR="/var/tmp/distfiles"
EMERGE_DEFAULT_OPTS="--alphabetical"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs ccache collision-protect compress-build-logs config-protect-if-modified distlocks ebuild-locks fail-clean fixlafiles news parallel-fetch parse-eapi-ebuild-head protect-owned sandbox sfperms sign strict suidctl unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://gentoo.osuosl.org/ http://mirrors.acm.cs.rpi.edu/gentoo/ ftp://ftp.ussg.iu.edu/pub/linux/gentoo"
LANG="en_US.UTF-8"
LC_ALL="en_US"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="en en_US"
MAKEOPTS="-j5"
PKGDIR="/var/tmp/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X a52 aac acl alsa amd64 apache2 apm bash-completion berkdb bzip2 bzlib cdda cddb cdr cli cracklib crypt curl custom-cflags cxx dba dga dio divx4linux dri dts dvd encode ffmpeg fftw flac gcj gdbm gpm gsm hardened iconv ieee1394 innodb javascript joystick jpeg2k justify ldap lirc lzo mad matroska mmx modplug modules mp3 mplayer mtp mudflap multilib musepack nas ncurses network nls nptl nsplugin ogg oggvorbis openal opengl openmp oss pam pax_kernel pcre png pppd readline samba sdl session snmp speex sse sse2 ssl tcpd theora threads truetype unicode urandom v4l v4l2 vcd vdpau vhosts vorbis wavpack xine xinerama xml xmlrpc xulrunner xvid zlib" ALSA_CARDS="ice1724" 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 auth_digest authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif so speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" 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" GRUB_PLATFORMS="pc" INPUT_DEVICES="evdev keyboard mouse" KERNEL="linux" LCD_DEVICES="imon" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en en_US" LIRC_DEVICES="commandir userspace" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" 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, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

Comment 1 Cory Coager 2012-10-06 13:56:21 UTC

Versions affected:

sys-kernel/spl-0.6.0_rc11
sys-fs/zfs-kmod-0.6.0_rc11
sys-fs/zfs-0.6.0_rc11

Comment 2 Cory Coager 2012-10-06 13:56:48 UTC

Created attachment 325794 [details]
dmesg

Comment 3 Richard Yao (RETIRED) gentoo-dev

2012-10-06 14:52:45 UTC

As per our discussion in IRC, this report has been refiled upstream. This report is in no way Gentoo-specific and as far as I know, it is the first of its kind. My own time to work on this is incredibly limited, so it would be far better to combine resources with upstream.