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Bug 481820 - >=sys-kernel/gentoo-sources-3.10.8 kernel panic with BFQ enabled
Summary: >=sys-kernel/gentoo-sources-3.10.8 kernel panic with BFQ enabled
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL: https://groups.google.com/forum/#!top...
Whiteboard:
Keywords:
: 481814 481954 (view as bug list)
Depends on:
Blocks:
 
Reported: 2013-08-21 07:18 UTC by Robert Förster
Modified: 2013-08-22 01:04 UTC (History)
3 users (show)

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


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Description Robert Förster 2013-08-21 07:18:04 UTC
see $URL, seems that doesn't only affect people using elevator switching, but everyone (i only have BFQ compiled in here)

Portage 2.2.0 (default/linux/amd64/13.0, gcc-4.7.3, glibc-2.17, 3.10.7-gentoo-chimera x86_64)
=================================================================
System uname: Linux-3.10.7-gentoo-chimera-x86_64-Intel-R-_Xeon-R-_CPU_E5405_@_2.00GHz-with-gentoo-2.2
KiB Mem:     2052452 total,    399032 free
KiB Swap:     996024 total,    996024 free
Timestamp of tree: Wed, 21 Aug 2013 06:00:01 +0000
ld GNU ld (GNU Binutils) 2.23.2
app-shells/bash:          4.2_p45
dev-java/java-config:     2.1.12-r1
dev-lang/python:          2.7.5-r2, 3.2.5-r2, 3.3.2-r2
dev-util/cmake:           2.8.11.1
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.12
sys-apps/sandbox:         2.6-r1
sys-devel/autoconf:       2.13, 2.69
sys-devel/automake:       1.12.6, 1.14
sys-devel/binutils:       2.23.2
sys-devel/gcc:            4.7.3
sys-devel/gcc-config:     1.8
sys-devel/libtool:        2.4.2
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.10 (virtual/os-headers)
sys-libs/glibc:           2.17
Repositories: gentoo java Dessa froxlor
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /opt/openfire/resources/security/ /usr/share/gnupg/qualified.txt /var/bind"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.4/ext-active/ /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.4/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.4/ext-active/ /etc/php/cli-php5.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--gc-sections"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-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="/var/lib/layman/java /usr/local/portage /usr/local/overlays/froxlor-gentoo"
SYNC="rsync://rsync.de.gentoo.org/gentoo-portage"
USE="acl amd64 berkdb bzip2 caps cli cracklib crypt cxx dri fortran gdbm iconv ipv6 ldap mmx modules mudflap multilib ncurses nls nptl openmp pam pcre readline session sse sse2 ssl tcpd truetype unicode vhosts zlib" ABI_X86="64" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd 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 access_compat" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" 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" KERNEL="linux" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-4 php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" RUBY_TARGETS="ruby19 ruby18" 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, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Comment 1 Justin Lecher (RETIRED) gentoo-dev 2013-08-21 08:00:59 UTC
*** Bug 481814 has been marked as a duplicate of this bug. ***
Comment 2 Holger Hoffstätte 2013-08-21 09:48:28 UTC
I reported this to the BFQ list during the 3.10.8-rc1 test window and there is a patch on the list. Please see https://groups.google.com/forum/#!topic/bfq-iosched/f4Lg5INzQ-k
Comment 3 Tom Wijsman (TomWij) (RETIRED) gentoo-dev 2013-08-21 12:21:31 UTC
In an hour from now, please sync and emerge 3.10.9 again.
Comment 4 Tom Wijsman (TomWij) (RETIRED) gentoo-dev 2013-08-21 13:33:20 UTC
*** Bug 481954 has been marked as a duplicate of this bug. ***
Comment 5 Dennis Schridde 2013-08-21 23:04:21 UTC
(In reply to Tom Wijsman (TomWij) from comment #3)
> In an hour from now, please sync and emerge 3.10.9 again.

Shouldn't it become 3.10.9-r1 then?
Comment 6 Tom Wijsman (TomWij) (RETIRED) gentoo-dev 2013-08-22 01:04:23 UTC
(In reply to Dennis Schridde from comment #5)
> (In reply to Tom Wijsman (TomWij) from comment #3)
> > In an hour from now, please sync and emerge 3.10.9 again.
> 
> Shouldn't it become 3.10.9-r1 then?

Revision bumps are not done for matters that only affect a small set of users so soon after a release; this causes an unnecessary unmerge of the old sources, an emerge of the new sources and then the majority then is clueless what happened.

BFQ will in the future be brought under USE=experimental; this brings people to the attention that this is an experimental thing, as well as that they need to keep track of the ChangeLog for fixes.

We want to give people that don't use experimental an undisturbed and solid experience; on the other hand, we also want to spare people from having to manually maintain their BFQ patches as well as spare out some duplicate effort in the Portage tree.

This happened once before where this was fixed up within half an hour to an hour or so; this time, it took a bit more hours, but these kind of things happen especially as my tests didn't show it as breaking (although it now appears it's not set as the default scheduler; so, I have to correct the tests).

A post install message will document what people need to do in case they get problems; this will document 1) they need to sync and check the ChangeLog, 2) a link to a site that contains patches they could apply such they don't have to emerge again, so they can easily incrementally build it, 3) or just emerge it again, 4) if there is no fix, that a bug can be filed, 5) and so on...

We will also do extra efforts to track upstream patches that were added, track upstream discussion and test these patches properly in advance.

This is all planned out as part of an earlier gentoo-dev ML discussion at

http://article.gmane.org/gmane.linux.gentoo.kernel/740

as well as recent discussions on IRC; by the time this gets introduced, a news article will be pushed out about this, this will document all the recent changes, decisions and more that the kernel team has taken and/or will do.

Sorry for the hiccup, BFQ is experimental; thank you for your understanding.

We want the best for everyone! Even if you run testing... :)