2.6.23 regressions

List of Aces http://kernelnewbies.org/known_regressions_stats (a.k.a statistics)

Unclassified

Gabriel C <nix.or.die@googlemail.com>
Satyam Sharma <satyam.sharma@gmail.com>
Vitaly Bordug <vitb@kernel.crashing.org>
Jeff Chua <jeff.chua.linux@gmail.com>
H. Peter Anvin <hpa@zytor.com>
Pavel Machek <pavel@ucw.cz>
Thomas Gleixner <tglx@linutronix.de>
Randy Dunlap <randy.dunlap@oracle.com>

Subject         : crashme fault
References      : http://lkml.org/lkml/2007/9/13/19
Last known good : ?
Submitter       : Randy Dunlap <randy.dunlap@oracle.com>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Subject         : cpu hotplug support broken in 2.6.23-rc3/highres timers break cpu hotplug in 2.6.23-rc5
References      : http://lkml.org/lkml/2007/8/27/58
                  http://lkml.org/lkml/2007/9/3/65
Last known good : ?
Submitter       : Pavel Machek <pavel@ucw.cz>
Caused-By       : ?
Handled-By      : Thomas Gleixner <tglx@linutronix.de>
Status          : problem is being debugged

Subject         : console is messed up after resume from s2ram or switching to console from X
References      : http://lkml.org/lkml/2007/8/4/6
                  http://lkml.org/lkml/2007/9/13/227
Last known good : ?
Submitter       : Jeff Chua <jeff.chua.linux@gmail.com>
Caused-By       : ?
Handled-By      : H. Peter Anvin <hpa@zytor.com>
                  Antonino A. Daplas <adaplas@gmail.com>
Workaround      : "s2ram --force --acpi_sleep 1 --vbe_mode"
Status          : problem is being debugged

Subject         : Oops while modprobing phy fixed module
References      : http://lkml.org/lkml/2007/7/14/63
Last known good : ?
Submitter       : Gabriel C <nix.or.die@googlemail.com>
Caused-By       : ?
Handled-By      : Satyam Sharma <satyam.sharma@gmail.com>
                  Vitaly Bordug <vitb@kernel.crashing.org>
Patch1          : http://lkml.org/lkml/2007/7/18/506
Status          : patch available

ACPI

<linux-acpi@vger.kernel.org>
Len Brown <lenb@kernel.org>
Chuck Ebbert <cebbert@redhat.com>
Alexey Starikovskiy <aystarik@gmail.com>

Subject         : 2.6.23-rc5 hangs on boot, apparently when initializing the EC
References      : http://lkml.org/lkml/2007/9/11/369
Last known good : ?
Submitter       : Chuck Ebbert <cebbert@redhat.com>
Caused-By       : ?
Handled-By      : Alexey Starikovskiy <aystarik@gmail.com>
Patch           : http://bugzilla.kernel.org/attachment.cgi?id=12673
Status          : patch was suggested

CPUFREQ

Len Brown <lenb@kernel.org>
Denis Sadykov <denis.m.sadykov@intel.com>
dth <dth@dth.net>

Subject         : ide problems: 2.6.22-git17 working, 2.6.23-rc1* is not
References      : http://lkml.org/lkml/2007/7/27/298
                  http://lkml.org/lkml/2007/7/29/371
Last known good : ?
Submitter       : dth <dth@dth.net>
Caused-By       : Len Brown <lenb@kernel.org>
                  commit f79e3185dd0f8650022518d7624c876d8929061b
Handled-By      : Len Brown <lenb@kernel.org>
Status          : problem is being debugged

Drivercore

Kay Sievers <kay.sievers@vrfy.org>
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Greg KH <gregkh@suse.de>
Anssi Hannula <anssi.hannula@gmail.com>

Subject         : sysfs change of input/event devices in 2.6.23rc breaks udev
References      : http://lkml.org/lkml/2007/9/8/86
Last known good : ?
Submitter       : Anssi Hannula <anssi.hannula@gmail.com>
Caused-By       : ?
Handled-By      : Dmitry Torokhov <dmitry.torokhov@gmail.com>
Patch           : http://lkml.org/lkml/2007/9/10/3
Status          : patch available

FireWire

linux1394-devel@lists.sourceforge.net
Ben Collins <ben.collins@ubuntu.com>
Stefan Richter <stefanr@s5r6.in-berlin.de>
Pavel Machek <pavel@ucw.cz>

Subject         : empty suspend stopped working around 2.6.23-rc4
References      : http://lkml.org/lkml/2007/9/11/326
Last known good : ?
Submitter       : Pavel Machek <pavel@ucw.cz>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

FS

linux-fsdevel@vger.kernel.org
Dave Kleikamp <shaggy@austin.ibm.com>
jfs-discussion@lists.sourceforge.net
Andy Whitcroft <apw@shadowen.org>
sct@redhat.com
adilger@clusterfs.com
linux-ext4@vger.kernel.org,

Subject         : hanging ext3 dbench tests
References      : http://lkml.org/lkml/2007/9/11/176
Last known good : ?
Submitter       : Andy Whitcroft <apw@shadowen.org>
Caused-By       : ?
Handled-By      : ?
Status          : under test -- unreproducible at present

Subject         : umount triggers a warning in jfs and takes almost a minute
References      : http://lkml.org/lkml/2007/9/4/73
Last known good : ?
Submitter       : Oliver Neukum <oliver@neukum.org>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Networking

netdev@vger.kernel.org
Shish <shish@shishnet.org>
Karl Meyer <adhocrocker@gmail.com>
Francois Romieu <romieu@fr.zoreil.com>
Daniel Drake <dsd@gentoo.org>
Oliver Neukum <oliver@neukum.org>
linux-usb-devel@lists.sourceforge.net
Florian Lohoff <flo@rfc822.org> 
Christian Kujau <lists@nerdbynature.de>
jamal <hadi@cyberus.ca>
Toralf Förster <toralf.foerster@gmx.de>

Subject         : build #301 failed for 2.6.23-rc6-g0d4cbb5 in linux/drivers/net/wireless/libertas/
References      : http://lkml.org/lkml/2007/9/11/150
Last known good : ?
Submitter       : Toralf Förster <toralf.foerster@gmx.de>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Subject         : 2.6.23-rc5: possible irq lock inversion dependency detected
References      : http://lkml.org/lkml/2007/9/2/97
Last known good : ?
Submitter       : Christian Kujau <lists@nerdbynature.de>
Caused-By       : ?
Handled-By      : jamal <hadi@cyberus.ca>
Patch           : http://lkml.org/lkml/2007/9/11/159
Status          : patch available

Subject         : zd1211rw regression, device does not enumerate
References      : http://marc.info/?l=linux-usb-devel&m=118854967709322&w=2
                  http://bugzilla.kernel.org/show_bug.cgi?id=8972
Last known good : ?
Submitter       : Oliver Neukum <oliver@neukum.org>
Caused-By       : Daniel Drake <dsd@gentoo.org>
                  commit 74553aedd46b3a2cae986f909cf2a3f99369decc
Handled-By      : ?
Status          : unknown

Subject         : NETDEV WATCHDOG: eth0: transmit timed out
References      : http://lkml.org/lkml/2007/8/13/737
Last known good : ?
Submitter       : Karl Meyer <adhocrocker@gmail.com>
Caused-By       : ?
Handled-By      : Francois Romieu <romieu@fr.zoreil.com>
Status          : problem is being debugged

Subject         : Weird network problems with 2.6.23-rc2
References      : http://lkml.org/lkml/2007/8/11/40
Last known good : ?
Submitter       : Shish <shish@shishnet.org>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Power management

<linux-pm@lists.linux-foundation.org>
Rafael J. Wysocki <rjw@sisk.pl>
Pavel Machek <pavel@ucw.cz>
Arkadiusz Miskiewicz <arekm@maven.pl>
Thomas Voegtle <tv@lio96.de>
Soeren Sonnenburg <kernel@nn7.de>
Christian Leber <christian@leber.de>

Subject         : powersaving degradation, (time spend in C0 goes up after a while)
References      : http://lkml.org/lkml/2007/9/2/142
Last known good : ?
Submitter       : Christian Leber <christian@leber.de>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Subject         : something broke resume from s2ram on mbp c1d (??? :))
References      : http://lkml.org/lkml/2007/8/28/67
Last known good : 2.6.23-rc3
Submitter       : Soeren Sonnenburg <kernel@nn7.de>
Caused-By       : ?
Handled-By      : Rafael J. Wysocki <rjw@sisk.pl>
Status          : unknown

Subject         : 2.6.23-rc2 swsusp, suddenly increased uptime
References      : http://lkml.org/lkml/2007/8/12/249
Last known good : ?
Submitter       : Thomas Voegtle <tv@lio96.de>
Caused-By       : ?
Handled-By      : Rafael J. Wysocki <rjw@sisk.pl>
Status          : problem is being debugged

Subject         : resume from ram much slower
References      : http://lkml.org/lkml/2007/8/10/275
Last known good : 2.6.23-rc1 ?
Submitter       : Arkadiusz Miskiewicz <arekm@maven.pl>
Caused-By       : ?
Handled-By      : Rafael J. Wysocki <rjw@sisk.pl>
Status          : problem is being debugged

USB

linux-usb-devel@lists.sourceforge.net
Greg KH <gregkh@suse.de>
Christian Volkmann <haveaniceday@cv-sv.de>

Subject         : usb 1-1: device not accepting address 2, error -62
References      : http://lkml.org/lkml/2007/9/14/302
Last known good : 2.6.22
Submitter       : Christian Volkmann <haveaniceday@cv-sv.de>
Caused-By       : ?
Handled-By      : ?
Status          : not an error. regular behavior if ehci_hcd is not loaded first.

http://kernelnewbies.org/known_regressions_2622 regressions in 2.6.22 (unmaintained)

http://kernelnewbies.org/known_regressions_2621 regressions in 2.6.21 (unmaintained)

Distro-tracked regressions

Gentoo

[http://bugs.gentoo.org/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=&long_desc_type=substring&long_desc=&bug_file_loc_type=allwordssubstr&bug_file_loc=&status_whiteboard_type=anywordssubstr&status_whiteboard=&keywords_type=allwords&keywords=&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=RESOLVED&resolution=UPSTREAM&resolution=---&emailassigned_to1=1&emailtype1=substring&email1=&emailassigned_to2=1&emailreporter2=1&emailcc2=1&emailtype2=substring&email2=&bugidtype=include&bug_id=&chfieldfrom=&chfieldto=Now&chfieldvalue=&cmdtype=doit&order=Reuse+same+sort+as+last+time&query_based_on=Kernel+regressions&field0-0-0=status_whiteboard&type0-0-0=regexp&value0-0-0=linux-2\.6\..*-regression Click here]

This list is kept relatively up-to-date. Gentoo kernels are only lightly patched, and the majority of bugs have been reproduced on unpatched kernels and reported upstream. Gentoo only track release kernels, not -rc releases (it's nice to see the scope of Adrian's previous work increased).

-  ⇤ ← Revision 1 as of 2007-04-28 09:49:39 → 
  Size: 1145
  Editor: unregister003160097217
  Comment: import (http://lkr.wikidot.com/list)
+   ← Revision 769 as of 2007-09-15 22:13:36 → ⇥
  Size: 10321
  Editor: dslb-084-060-101-047
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-= Known regressions =
Feel free to add new fixed etc. (You need to create account on wikidot.com)

= New regressions (submitted after 2.6.21) =
{{{
To:
Linux Kernel Mailing List < linux-kernel@vger.kernel.org >,
linux-acpi@vger.kernel.org,
Riccardo Ricci < rricci@nuovanetmore.it >,
Udo A. Steinberg < us15@os.inf.tu-dresden.de >,
Len Brown < len.brown@intel.com >,
David Brownell < david-b@pacbell.net >,
Jeff Mahoney < jeffm@suse.com >,
reiserfs-dev@namesys.com ,

Subject : 2.6.21 don't boot, it stops after ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 6 7 9 10 11 12 14 15).
References : http://lkml.org/lkml/2007/4/27/400
Submitter : Riccardo Ricci < rricci@nuovanetmore.it >
Status : unknown

Subject : ACPI interpreter errors
References : http://lkml.org/lkml/2007/4/27/206
Submitter : Udo A. Steinberg < us15@os.inf.tu-dresden.de >
Status : unknown

Subject : reiserfs -- circular locking
References : http://lkml.org/lkml/2007/4/26/648
Submitter : David Brownell < david-b@pacbell.net >
Handled-By : Jeff Mahoney < jeffm@suse.com >
Patch : http://lkml.org/lkml/2007/4/27/332
Status : patch available
}}}
+Feel free to add new/remove fixed etc.

[[TableOfContents]]

= 2.6.23 regressions =

List of Aces http://kernelnewbies.org/known_regressions_stats (a.k.a statistics)

== Unclassified ==
{{{
Gabriel C <nix.or.die@googlemail.com>
Satyam Sharma <satyam.sharma@gmail.com>
Vitaly Bordug <vitb@kernel.crashing.org>
Jeff Chua <jeff.chua.linux@gmail.com>
H. Peter Anvin <hpa@zytor.com>
Pavel Machek <pavel@ucw.cz>
Thomas Gleixner <tglx@linutronix.de>
Randy Dunlap <randy.dunlap@oracle.com>

Subject         : crashme fault
References      : http://lkml.org/lkml/2007/9/13/19
Last known good : ?
Submitter       : Randy Dunlap <randy.dunlap@oracle.com>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Subject         : cpu hotplug support broken in 2.6.23-rc3/highres timers break cpu hotplug in 2.6.23-rc5
References      : http://lkml.org/lkml/2007/8/27/58
                  http://lkml.org/lkml/2007/9/3/65
Last known good : ?
Submitter       : Pavel Machek <pavel@ucw.cz>
Caused-By       : ?
Handled-By      : Thomas Gleixner <tglx@linutronix.de>
Status          : problem is being debugged

Subject         : console is messed up after resume from s2ram or switching to console from X
References      : http://lkml.org/lkml/2007/8/4/6
                  http://lkml.org/lkml/2007/9/13/227
Last known good : ?
Submitter       : Jeff Chua <jeff.chua.linux@gmail.com>
Caused-By       : ?
Handled-By      : H. Peter Anvin <hpa@zytor.com>
                  Antonino A. Daplas <adaplas@gmail.com>
Workaround      : "s2ram --force --acpi_sleep 1 --vbe_mode"
Status          : problem is being debugged

Subject         : Oops while modprobing phy fixed module
References      : http://lkml.org/lkml/2007/7/14/63
Last known good : ?
Submitter       : Gabriel C <nix.or.die@googlemail.com>
Caused-By       : ?
Handled-By      : Satyam Sharma <satyam.sharma@gmail.com>
                  Vitaly Bordug <vitb@kernel.crashing.org>
Patch1          : http://lkml.org/lkml/2007/7/18/506
Status          : patch available
}}}

== ACPI ==
{{{
<linux-acpi@vger.kernel.org>
Len Brown <lenb@kernel.org>
Chuck Ebbert <cebbert@redhat.com>
Alexey Starikovskiy <aystarik@gmail.com>

Subject         : 2.6.23-rc5 hangs on boot, apparently when initializing the EC
References      : http://lkml.org/lkml/2007/9/11/369
Last known good : ?
Submitter       : Chuck Ebbert <cebbert@redhat.com>
Caused-By       : ?
Handled-By      : Alexey Starikovskiy <aystarik@gmail.com>
Patch           : http://bugzilla.kernel.org/attachment.cgi?id=12673
Status          : patch was suggested
}}}

== CPUFREQ ==
{{{
Len Brown <lenb@kernel.org>
Denis Sadykov <denis.m.sadykov@intel.com>
dth <dth@dth.net>

Subject         : ide problems: 2.6.22-git17 working, 2.6.23-rc1* is not
References      : http://lkml.org/lkml/2007/7/27/298
                  http://lkml.org/lkml/2007/7/29/371
Last known good : ?
Submitter       : dth <dth@dth.net>
Caused-By       : Len Brown <lenb@kernel.org>
                  commit f79e3185dd0f8650022518d7624c876d8929061b
Handled-By      : Len Brown <lenb@kernel.org>
Status          : problem is being debugged
}}}

== Drivercore ==
{{{
Kay Sievers <kay.sievers@vrfy.org>
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Greg KH <gregkh@suse.de>
Anssi Hannula <anssi.hannula@gmail.com>

Subject         : sysfs change of input/event devices in 2.6.23rc breaks udev
References      : http://lkml.org/lkml/2007/9/8/86
Last known good : ?
Submitter       : Anssi Hannula <anssi.hannula@gmail.com>
Caused-By       : ?
Handled-By      : Dmitry Torokhov <dmitry.torokhov@gmail.com>
Patch           : http://lkml.org/lkml/2007/9/10/3
Status          : patch available
}}}

== FireWire ==
{{{
linux1394-devel@lists.sourceforge.net
Ben Collins <ben.collins@ubuntu.com>
Stefan Richter <stefanr@s5r6.in-berlin.de>
Pavel Machek <pavel@ucw.cz>

Subject         : empty suspend stopped working around 2.6.23-rc4
References      : http://lkml.org/lkml/2007/9/11/326
Last known good : ?
Submitter       : Pavel Machek <pavel@ucw.cz>
Caused-By       : ?
Handled-By      : ?
Status          : unknown
}}}

== FS ==
{{{
linux-fsdevel@vger.kernel.org
Dave Kleikamp <shaggy@austin.ibm.com>
jfs-discussion@lists.sourceforge.net
Andy Whitcroft <apw@shadowen.org>
sct@redhat.com
adilger@clusterfs.com
linux-ext4@vger.kernel.org,

Subject         : hanging ext3 dbench tests
References      : http://lkml.org/lkml/2007/9/11/176
Last known good : ?
Submitter       : Andy Whitcroft <apw@shadowen.org>
Caused-By       : ?
Handled-By      : ?
Status          : under test -- unreproducible at present

Subject         : umount triggers a warning in jfs and takes almost a minute
References      : http://lkml.org/lkml/2007/9/4/73
Last known good : ?
Submitter       : Oliver Neukum <oliver@neukum.org>
Caused-By       : ?
Handled-By      : ?
Status          : unknown
}}}

== Networking ==
{{{
netdev@vger.kernel.org
Shish <shish@shishnet.org>
Karl Meyer <adhocrocker@gmail.com>
Francois Romieu <romieu@fr.zoreil.com>
Daniel Drake <dsd@gentoo.org>
Oliver Neukum <oliver@neukum.org>
linux-usb-devel@lists.sourceforge.net
Florian Lohoff <flo@rfc822.org> 
Christian Kujau <lists@nerdbynature.de>
jamal <hadi@cyberus.ca>
Toralf Förster <toralf.foerster@gmx.de>

Subject         : build #301 failed for 2.6.23-rc6-g0d4cbb5 in linux/drivers/net/wireless/libertas/
References      : http://lkml.org/lkml/2007/9/11/150
Last known good : ?
Submitter       : Toralf Förster <toralf.foerster@gmx.de>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Subject         : 2.6.23-rc5: possible irq lock inversion dependency detected
References      : http://lkml.org/lkml/2007/9/2/97
Last known good : ?
Submitter       : Christian Kujau <lists@nerdbynature.de>
Caused-By       : ?
Handled-By      : jamal <hadi@cyberus.ca>
Patch           : http://lkml.org/lkml/2007/9/11/159
Status          : patch available

Subject         : zd1211rw regression, device does not enumerate
References      : http://marc.info/?l=linux-usb-devel&m=118854967709322&w=2
                  http://bugzilla.kernel.org/show_bug.cgi?id=8972
Last known good : ?
Submitter       : Oliver Neukum <oliver@neukum.org>
Caused-By       : Daniel Drake <dsd@gentoo.org>
                  commit 74553aedd46b3a2cae986f909cf2a3f99369decc
Handled-By      : ?
Status          : unknown

Subject         : NETDEV WATCHDOG: eth0: transmit timed out
References      : http://lkml.org/lkml/2007/8/13/737
Last known good : ?
Submitter       : Karl Meyer <adhocrocker@gmail.com>
Caused-By       : ?
Handled-By      : Francois Romieu <romieu@fr.zoreil.com>
Status          : problem is being debugged

Subject         : Weird network problems with 2.6.23-rc2
References      : http://lkml.org/lkml/2007/8/11/40
Last known good : ?
Submitter       : Shish <shish@shishnet.org>
Caused-By       : ?
Handled-By      : ?
Status          : unknown
}}}

== Power management ==
{{{
<linux-pm@lists.linux-foundation.org>
Rafael J. Wysocki <rjw@sisk.pl>
Pavel Machek <pavel@ucw.cz>
Arkadiusz Miskiewicz <arekm@maven.pl>
Thomas Voegtle <tv@lio96.de>
Soeren Sonnenburg <kernel@nn7.de>
Christian Leber <christian@leber.de>

Subject         : powersaving degradation, (time spend in C0 goes up after a while)
References      : http://lkml.org/lkml/2007/9/2/142
Last known good : ?
Submitter       : Christian Leber <christian@leber.de>
Caused-By       : ?
Handled-By      : ?
Status          : unknown

Subject         : something broke resume from s2ram on mbp c1d (??? :))
References      : http://lkml.org/lkml/2007/8/28/67
Last known good : 2.6.23-rc3
Submitter       : Soeren Sonnenburg <kernel@nn7.de>
Caused-By       : ?
Handled-By      : Rafael J. Wysocki <rjw@sisk.pl>
Status          : unknown

Subject         : 2.6.23-rc2 swsusp, suddenly increased uptime
References      : http://lkml.org/lkml/2007/8/12/249
Last known good : ?
Submitter       : Thomas Voegtle <tv@lio96.de>
Caused-By       : ?
Handled-By      : Rafael J. Wysocki <rjw@sisk.pl>
Status          : problem is being debugged

Subject         : resume from ram much slower
References      : http://lkml.org/lkml/2007/8/10/275
Last known good : 2.6.23-rc1 ?
Submitter       : Arkadiusz Miskiewicz <arekm@maven.pl>
Caused-By       : ?
Handled-By      : Rafael J. Wysocki <rjw@sisk.pl>
Status          : problem is being debugged
}}}

== USB ==
{{{
linux-usb-devel@lists.sourceforge.net
Greg KH <gregkh@suse.de>
Christian Volkmann <haveaniceday@cv-sv.de>

Subject         : usb 1-1: device not accepting address 2, error -62
References      : http://lkml.org/lkml/2007/9/14/302
Last known good : 2.6.22
Submitter       : Christian Volkmann <haveaniceday@cv-sv.de>
Caused-By       : ?
Handled-By      : ?
Status          : not an error. regular behavior if ehci_hcd is not loaded first.
}}}

http://kernelnewbies.org/known_regressions_2622 regressions in 2.6.22 (unmaintained)

http://kernelnewbies.org/known_regressions_2621 regressions in 2.6.21 (unmaintained)



= Distro-tracked regressions =
== Gentoo ==
[http://bugs.gentoo.org/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=&long_desc_type=substring&long_desc=&bug_file_loc_type=allwordssubstr&bug_file_loc=&status_whiteboard_type=anywordssubstr&status_whiteboard=&keywords_type=allwords&keywords=&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=RESOLVED&resolution=UPSTREAM&resolution=---&emailassigned_to1=1&emailtype1=substring&email1=&emailassigned_to2=1&emailreporter2=1&emailcc2=1&emailtype2=substring&email2=&bugidtype=include&bug_id=&chfieldfrom=&chfieldto=Now&chfieldvalue=&cmdtype=doit&order=Reuse+same+sort+as+last+time&query_based_on=Kernel+regressions&field0-0-0=status_whiteboard&type0-0-0=regexp&value0-0-0=linux-2\.6\..*-regression Click here]

This list is kept relatively up-to-date. Gentoo kernels are only lightly patched, and the majority of bugs have been reproduced on unpatched kernels and reported upstream. Gentoo only track release kernels, not -rc releases (it's nice to see the scope of Adrian's previous work increased).