This message contains a list of some regressions from 2.6.27, for which there
are no fixes in the mainline I know of. If any of them have been fixed already,
please let me know.
If you know of any other unresolved regressions from 2.6.27, please let me know
either and I'll add them to the list. Also, please let me know if any of the
entries below are invalid.
Each entry from the list will be sent additionally in an automatic reply to
this message with CCs to the people involved in reporting and handling the
issue.
Listed regressions statistics:
Date Total Pending Unresolved
----------------------------------------
2008-12-07 106 20 17
2008-12-04 106 29 21
2008-11-22 93 25 15
2008-11-16 89 32 18
2008-11-09 73 40 27
2008-11-02 55 41 29
2008-10-25 26 25 20
Unresolved regressions
----------------------
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12178
Subject : Xorg crash at first start
Submitter : Cédric Godin <[email protected]>
Date : 2008-12-04 14:26 (4 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=52440211dcdc52c0b757f8b34d122e11b12cdd50
References : http://marc.info/?l=linux-kernel&m=122840082828098&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12161
Subject : [i915 drm] irq 16: nobody cared with latest git kernels
Submitter : fredi ml <[email protected]>
Date : 2008-12-02 13:26 (6 days old)
References : http://marc.info/?l=linux-kernel&m=122822444615724&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12160
Subject : networking oops after resume from s2ram (2.6.28-rc6)
Submitter : Marcin Slusarz <[email protected]>
Date : 2008-11-28 21:15 (10 days old)
References : http://marc.info/?l=linux-kernel&m=122790701615723&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12159
Subject : 2.6.28-rc6-git1 -- No sound produced from Intel HDA ALSA driver
Submitter : Miles Lane <[email protected]>
Date : 2008-11-27 20:33 (11 days old)
References : http://marc.info/?l=linux-kernel&m=122781805620212&w=4
Handled-By : Takashi Iwai <[email protected]>
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12158
Subject : commit b1ee26b freezes system on switching from X to text console
Submitter : Gaudenz Steinlin <[email protected]>
Date : 2008-11-25 19:44 (13 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b1ee26bab14886350ba12a5c10cbc0696ac679bf
References : http://marc.info/?l=linux-kernel&m=122764344231140&w=4
Handled-By : Benjamin Herrenschmidt <[email protected]>
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12156
Subject : v2.6.28-rc2: x86_32 relocation regression?
Submitter : Vegard Nossum <[email protected]>
Date : 2008-11-24 21:19 (14 days old)
References : http://marc.info/?l=linux-kernel&m=122756158220966&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12155
Subject : Regression in 2.6.28-rc and 2.6.27-stable - hibernate related
Submitter : Fabio Comolli <[email protected]>
Date : 2008-11-23 16:17 (15 days old)
References : http://marc.info/?l=linux-kernel&m=122745709926361&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12152
Subject : Huge wakeups number from i1915
Submitter : Yves-Alexis Perez <[email protected]>
Date : 2008-12-02 16:48 (6 days old)
References : http://marc.info/?l=linux-acpi&m=122823656702994&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12100
Subject : resume (S2R) broken by Intel microcode module, on A110L
Submitter : Andreas Mohr <[email protected]>
Date : 2008-11-25 08:48 (13 days old)
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12061
Subject : snd_hda_intel: power_save: sound cracks on powerdown
Submitter : Jens Weibler <[email protected]>
Date : 2008-11-18 12:07 (20 days old)
Handled-By : Takashi Iwai <[email protected]>
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12034
Subject : snd-hda-intel on Realtek ALC268 chip shows only Master volume (for playback)
Submitter : Sergey <[email protected]>
Date : 2008-11-15 04:20 (23 days old)
Handled-By : Takashi Iwai <[email protected]>
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12028
Subject : i915 DRM is broken in 2.6.28-rc4
Submitter : Adam Tkac <[email protected]>
Date : 2008-11-14 01:50 (24 days old)
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11958
Subject : [2.6.27.x => 2.6.28-rc3] Xorg crash with xf86MapVidMem error
Submitter : Tomasz Chmielewski <[email protected]>
Date : 2008-11-05 05:37 (33 days old)
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11947
Subject : 2.6.28-rc VC switching with Intel graphics broken
Submitter : Romano Giannetti <[email protected]>
Date : 2008-11-03 12:10 (35 days old)
Handled-By : Jesse Barnes <[email protected]>
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11906
Subject : 2.6.28-rc2 seems to fail at powering down the monitor when it should
Submitter : Gene Heskett <[email protected]>
Date : 2008-10-30 6:39 (39 days old)
References : http://marc.info/?l=linux-kernel&m=122534879721424&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11858
Subject : Timeout regression introduced by 242f9dcb8ba6f68fcd217a119a7648a4f69290e9
Submitter : Tejun Heo <[email protected]>
Date : 2008-10-26 9:46 (43 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=242f9dcb8ba6f68fcd217a119a7648a4f69290e9
References : http://marc.info/?l=linux-kernel&m=122501447326698&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11849
Subject : default IRQ affinity change in v2.6.27 (breaking several SMP PPC based systems)
Submitter : Kumar Gala <[email protected]>
Date : 2008-10-24 12:45 (45 days old)
References : http://marc.info/?l=linux-kernel&m=122485245924125&w=4
Regressions with patches
------------------------
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12177
Subject : [memcg BUG ?] failed to boot on IA64 with CONFIG_DISCONTIGMEM=y
Submitter : Li Zefan <[email protected]>
Date : 2008-12-05 3:09 (3 days old)
References : http://marc.info/?l=linux-kernel&m=122844668532752&w=4
Handled-By : KAMEZAWA Hiroyuki <[email protected]>
Patch : http://marc.info/?l=linux-kernel&m=122844757701505&w=4
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12047
Subject : ACPI toshiba: only register rfkill if bt is enabled
Submitter : Andrey Borzenkov <[email protected]>
Date : 2008-10-28 19:10 (41 days old)
References : http://marc.info/?l=linux-kernel&m=122522113619025&w=2
Handled-By : Frederik Deweerdt <[email protected]>
Patch : http://marc.info/?l=linux-kernel&m=122526843117478&w=2
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11898
Subject : mke2fs hang on AIC79 device.
Submitter : alexs <[email protected]>
Date : 2008-10-30 01:17 (39 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f0c0a376d0fcd4c5579ecf5e95f88387cba85211
Handled-By : James Bottomley <[email protected]>
Mike Christie <[email protected]>
Patch : http://bugzilla.kernel.org/show_bug.cgi?id=11898#c28
http://bugzilla.kernel.org/show_bug.cgi?id=11898#c36
For details, please visit the bug entries and follow the links given in
references.
As you can see, there is a Bugzilla entry for each of the listed regressions.
There also is a Bugzilla entry used for tracking the regressions from 2.6.27,
unresolved as well as resolved, at:
http://bugzilla.kernel.org/show_bug.cgi?id=11808
Please let me know if there are any Bugzilla entries that should be added to
the list in there.
Thanks,
Rafael
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11849
Subject : default IRQ affinity change in v2.6.27 (breaking several SMP PPC based systems)
Submitter : Kumar Gala <[email protected]>
Date : 2008-10-24 12:45 (45 days old)
References : http://marc.info/?l=linux-kernel&m=122485245924125&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11958
Subject : [2.6.27.x => 2.6.28-rc3] Xorg crash with xf86MapVidMem error
Submitter : Tomasz Chmielewski <[email protected]>
Date : 2008-11-05 05:37 (33 days old)
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11858
Subject : Timeout regression introduced by 242f9dcb8ba6f68fcd217a119a7648a4f69290e9
Submitter : Tejun Heo <[email protected]>
Date : 2008-10-26 9:46 (43 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=242f9dcb8ba6f68fcd217a119a7648a4f69290e9
References : http://marc.info/?l=linux-kernel&m=122501447326698&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11898
Subject : mke2fs hang on AIC79 device.
Submitter : alexs <[email protected]>
Date : 2008-10-30 01:17 (39 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f0c0a376d0fcd4c5579ecf5e95f88387cba85211
Handled-By : James Bottomley <[email protected]>
Mike Christie <[email protected]>
Patch : http://bugzilla.kernel.org/show_bug.cgi?id=11898#c28
http://bugzilla.kernel.org/show_bug.cgi?id=11898#c36
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11906
Subject : 2.6.28-rc2 seems to fail at powering down the monitor when it should
Submitter : Gene Heskett <[email protected]>
Date : 2008-10-30 6:39 (39 days old)
References : http://marc.info/?l=linux-kernel&m=122534879721424&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11947
Subject : 2.6.28-rc VC switching with Intel graphics broken
Submitter : Romano Giannetti <[email protected]>
Date : 2008-11-03 12:10 (35 days old)
Handled-By : Jesse Barnes <[email protected]>
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12028
Subject : i915 DRM is broken in 2.6.28-rc4
Submitter : Adam Tkac <[email protected]>
Date : 2008-11-14 01:50 (24 days old)
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12034
Subject : snd-hda-intel on Realtek ALC268 chip shows only Master volume (for playback)
Submitter : Sergey <[email protected]>
Date : 2008-11-15 04:20 (23 days old)
Handled-By : Takashi Iwai <[email protected]>
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12100
Subject : resume (S2R) broken by Intel microcode module, on A110L
Submitter : Andreas Mohr <[email protected]>
Date : 2008-11-25 08:48 (13 days old)
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12061
Subject : snd_hda_intel: power_save: sound cracks on powerdown
Submitter : Jens Weibler <[email protected]>
Date : 2008-11-18 12:07 (20 days old)
Handled-By : Takashi Iwai <[email protected]>
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12152
Subject : Huge wakeups number from i1915
Submitter : Yves-Alexis Perez <[email protected]>
Date : 2008-12-02 16:48 (6 days old)
References : http://marc.info/?l=linux-acpi&m=122823656702994&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12155
Subject : Regression in 2.6.28-rc and 2.6.27-stable - hibernate related
Submitter : Fabio Comolli <[email protected]>
Date : 2008-11-23 16:17 (15 days old)
References : http://marc.info/?l=linux-kernel&m=122745709926361&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12159
Subject : 2.6.28-rc6-git1 -- No sound produced from Intel HDA ALSA driver
Submitter : Miles Lane <[email protected]>
Date : 2008-11-27 20:33 (11 days old)
References : http://marc.info/?l=linux-kernel&m=122781805620212&w=4
Handled-By : Takashi Iwai <[email protected]>
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12156
Subject : v2.6.28-rc2: x86_32 relocation regression?
Submitter : Vegard Nossum <[email protected]>
Date : 2008-11-24 21:19 (14 days old)
References : http://marc.info/?l=linux-kernel&m=122756158220966&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12158
Subject : commit b1ee26b freezes system on switching from X to text console
Submitter : Gaudenz Steinlin <[email protected]>
Date : 2008-11-25 19:44 (13 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b1ee26bab14886350ba12a5c10cbc0696ac679bf
References : http://marc.info/?l=linux-kernel&m=122764344231140&w=4
Handled-By : Benjamin Herrenschmidt <[email protected]>
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12047
Subject : ACPI toshiba: only register rfkill if bt is enabled
Submitter : Andrey Borzenkov <[email protected]>
Date : 2008-10-28 19:10 (41 days old)
References : http://marc.info/?l=linux-kernel&m=122522113619025&w=2
Handled-By : Frederik Deweerdt <[email protected]>
Patch : http://marc.info/?l=linux-kernel&m=122526843117478&w=2
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12160
Subject : networking oops after resume from s2ram (2.6.28-rc6)
Submitter : Marcin Slusarz <[email protected]>
Date : 2008-11-28 21:15 (10 days old)
References : http://marc.info/?l=linux-kernel&m=122790701615723&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12161
Subject : [i915 drm] irq 16: nobody cared with latest git kernels
Submitter : fredi ml <[email protected]>
Date : 2008-12-02 13:26 (6 days old)
References : http://marc.info/?l=linux-kernel&m=122822444615724&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12177
Subject : [memcg BUG ?] failed to boot on IA64 with CONFIG_DISCONTIGMEM=y
Submitter : Li Zefan <[email protected]>
Date : 2008-12-05 3:09 (3 days old)
References : http://marc.info/?l=linux-kernel&m=122844668532752&w=4
Handled-By : KAMEZAWA Hiroyuki <[email protected]>
Patch : http://marc.info/?l=linux-kernel&m=122844757701505&w=4
This message has been generated automatically as a part of a report
of recent regressions.
The following bug entry is on the current list of known regressions
from 2.6.27. Please verify if it still should be listed and let me know
(either way).
Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12178
Subject : Xorg crash at first start
Submitter : Cédric Godin <[email protected]>
Date : 2008-12-04 14:26 (4 days old)
First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=52440211dcdc52c0b757f8b34d122e11b12cdd50
References : http://marc.info/?l=linux-kernel&m=122840082828098&w=4
On Sun, 7 Dec 2008 21:32:54 +0100 (CET)
"Rafael J. Wysocki" <[email protected]> wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.27. Please verify if it still should be listed and let me
> know (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12152
> Subject : Huge wakeups number from i1915
> Submitter : Yves-Alexis Perez <[email protected]>
> Date : 2008-12-02 16:48 (6 days old)
> References :
> http://marc.info/?l=linux-acpi&m=122823656702994&w=4
>
at least in some of the cases where this has been seen the cause is the
following:
The i915 DRM driver used to do polling for completion, busy waiting. It
moved to be interrupt driven, which is usually better for power, but it
will show up as more wakeups in powertop....
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
On Sunday, 7 of December 2008, Arjan van de Ven wrote:
> On Sun, 7 Dec 2008 21:32:54 +0100 (CET)
> "Rafael J. Wysocki" <[email protected]> wrote:
>
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.27. Please verify if it still should be listed and let me
> > know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12152
> > Subject : Huge wakeups number from i1915
> > Submitter : Yves-Alexis Perez <[email protected]>
> > Date : 2008-12-02 16:48 (6 days old)
> > References :
> > http://marc.info/?l=linux-acpi&m=122823656702994&w=4
> >
>
> at least in some of the cases where this has been seen the cause is the
> following:
> The i915 DRM driver used to do polling for completion, busy waiting. It
> moved to be interrupt driven, which is usually better for power, but it
> will show up as more wakeups in powertop....
IOW, this is not a regression?
Rafael
On Sun, 7 Dec 2008 23:52:06 +0100
"Rafael J. Wysocki" <[email protected]> wrote:
> On Sunday, 7 of December 2008, Arjan van de Ven wrote:
> > On Sun, 7 Dec 2008 21:32:54 +0100 (CET)
> > "Rafael J. Wysocki" <[email protected]> wrote:
> >
> > > This message has been generated automatically as a part of a
> > > report of recent regressions.
> > >
> > > The following bug entry is on the current list of known
> > > regressions from 2.6.27. Please verify if it still should be
> > > listed and let me know (either way).
> > >
> > >
> > > Bug-Entry :
> > > http://bugzilla.kernel.org/show_bug.cgi?id=12152
> > > Subject : Huge wakeups number from i1915
> > > Submitter : Yves-Alexis Perez <[email protected]>
> > > Date : 2008-12-02 16:48 (6 days old)
> > > References :
> > > http://marc.info/?l=linux-acpi&m=122823656702994&w=4
> > >
> >
> > at least in some of the cases where this has been seen the cause is
> > the following:
> > The i915 DRM driver used to do polling for completion, busy
> > waiting. It moved to be interrupt driven, which is usually better
> > for power, but it will show up as more wakeups in powertop....
>
> IOW, this is not a regression?
I don't know about this specifc case (not enough information) but for
the case I described it's not a regression. Going to interrupt driven
from busy waiting is an improvement not a regression :)
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
On Monday, 8 of December 2008, Arjan van de Ven wrote:
> On Sun, 7 Dec 2008 23:52:06 +0100
> "Rafael J. Wysocki" <[email protected]> wrote:
>
> > On Sunday, 7 of December 2008, Arjan van de Ven wrote:
> > > On Sun, 7 Dec 2008 21:32:54 +0100 (CET)
> > > "Rafael J. Wysocki" <[email protected]> wrote:
> > >
> > > > This message has been generated automatically as a part of a
> > > > report of recent regressions.
> > > >
> > > > The following bug entry is on the current list of known
> > > > regressions from 2.6.27. Please verify if it still should be
> > > > listed and let me know (either way).
> > > >
> > > >
> > > > Bug-Entry :
> > > > http://bugzilla.kernel.org/show_bug.cgi?id=12152
> > > > Subject : Huge wakeups number from i1915
> > > > Submitter : Yves-Alexis Perez <[email protected]>
> > > > Date : 2008-12-02 16:48 (6 days old)
> > > > References :
> > > > http://marc.info/?l=linux-acpi&m=122823656702994&w=4
> > > >
> > >
> > > at least in some of the cases where this has been seen the cause is
> > > the following:
> > > The i915 DRM driver used to do polling for completion, busy
> > > waiting. It moved to be interrupt driven, which is usually better
> > > for power, but it will show up as more wakeups in powertop....
> >
> > IOW, this is not a regression?
>
> I don't know about this specifc case (not enough information) but for
> the case I described it's not a regression. Going to interrupt driven
> from busy waiting is an improvement not a regression :)
Sure it is. :-)
Let's wait for the reporter to respond.
On dim, 2008-12-07 at 15:12 -0800, Arjan van de Ven wrote:
>
> > > at least in some of the cases where this has been seen the cause
> is
> > > the following:
> > > The i915 DRM driver used to do polling for completion, busy
> > > waiting. It moved to be interrupt driven, which is usually better
> > > for power, but it will show up as more wakeups in powertop....
> >
> > IOW, this is not a regression?
>
> I don't know about this specifc case (not enough information) but for
> the case I described it's not a regression. Going to interrupt driven
> from busy waiting is an improvement not a regression :)
Well, several thousand or more interrupts really seems like a
regression :). But it seems that's the same thing as the “IRQ
spinning” (there was a thread on dri-devel about that).
It seems fixed with a patch from Matthew Garrett applied to
drm-intel/for-airlied but I don't think this has been applied to Linus
master.
Cheers,
--
Yves-Alexis
On lun, 2008-12-08 at 07:24 +0100, Yves-Alexis Perez wrote:
> On dim, 2008-12-07 at 15:12 -0800, Arjan van de Ven wrote:
> >
> > > > at least in some of the cases where this has been seen the cause
> > is
> > > > the following:
> > > > The i915 DRM driver used to do polling for completion, busy
> > > > waiting. It moved to be interrupt driven, which is usually better
> > > > for power, but it will show up as more wakeups in powertop....
> > >
> > > IOW, this is not a regression?
> >
> > I don't know about this specifc case (not enough information) but for
> > the case I described it's not a regression. Going to interrupt driven
> > from busy waiting is an improvement not a regression :)
>
> Well, several thousand or more interrupts really seems like a
> regression :). But it seems that's the same thing as the “IRQ
> spinning” (there was a thread on dri-devel about that).
>
> It seems fixed with a patch from Matthew Garrett applied to
> drm-intel/for-airlied but I don't think this has been applied to Linus
> master.
And it seems the same thing as
https://bugs.freedesktop.org/show_bug.cgi?id=18609
Cheers,
--
Yves-Alexis
* Rafael J. Wysocki <[email protected]> [2008-12-07 21:32:57]:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.27. Please verify if it still should be listed and let me know
> (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12177
> Subject : [memcg BUG ?] failed to boot on IA64 with CONFIG_DISCONTIGMEM=y
> Submitter : Li Zefan <[email protected]>
> Date : 2008-12-05 3:09 (3 days old)
> References : http://marc.info/?l=linux-kernel&m=122844668532752&w=4
> Handled-By : KAMEZAWA Hiroyuki <[email protected]>
> Patch : http://marc.info/?l=linux-kernel&m=122844757701505&w=4
Kamezawa has a fix that Li has tested. We need to polish the changelog
and resend the patch.
--
Balbir
On Monday, 8 of December 2008, Yves-Alexis Perez wrote:
> On dim, 2008-12-07 at 15:12 -0800, Arjan van de Ven wrote:
> >
> > > > at least in some of the cases where this has been seen the cause
> > is
> > > > the following:
> > > > The i915 DRM driver used to do polling for completion, busy
> > > > waiting. It moved to be interrupt driven, which is usually better
> > > > for power, but it will show up as more wakeups in powertop....
> > >
> > > IOW, this is not a regression?
> >
> > I don't know about this specifc case (not enough information) but for
> > the case I described it's not a regression. Going to interrupt driven
> > from busy waiting is an improvement not a regression :)
>
> Well, several thousand or more interrupts really seems like a
> regression :). But it seems that's the same thing as the “IRQ
> spinning” (there was a thread on dri-devel about that).
>
> It seems fixed with a patch from Matthew Garrett applied to
> drm-intel/for-airlied but I don't think this has been applied to Linus
> master.
Any pointers to the patch, please?
Rafael
On Monday, 8 of December 2008, Balbir Singh wrote:
> * Rafael J. Wysocki <[email protected]> [2008-12-07 21:32:57]:
>
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.27. Please verify if it still should be listed and let me know
> > (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12177
> > Subject : [memcg BUG ?] failed to boot on IA64 with CONFIG_DISCONTIGMEM=y
> > Submitter : Li Zefan <[email protected]>
> > Date : 2008-12-05 3:09 (3 days old)
> > References : http://marc.info/?l=linux-kernel&m=122844668532752&w=4
> > Handled-By : KAMEZAWA Hiroyuki <[email protected]>
> > Patch : http://marc.info/?l=linux-kernel&m=122844757701505&w=4
>
> Kamezawa has a fix that Li has tested. We need to polish the changelog
> and resend the patch.
Thanks for the update.
Rafael
On lun, 2008-12-08 at 08:28 +0100, Rafael J. Wysocki wrote:
> Any pointers to the patch, please?
The patch I had success with was the one enabling MSI on 965. You can
find it there:
http://marc.info/?l=dri-devel&m=122843874524733&w=2
Not sure if it's “the one” really usable, but at least it fixes the
problem for now.
Cheers,
--
Yves-Alexis
On Mon, Dec 08, 2008 at 08:28:07AM +0100, Rafael J. Wysocki wrote:
> On Monday, 8 of December 2008, Yves-Alexis Perez wrote:
> > On dim, 2008-12-07 at 15:12 -0800, Arjan van de Ven wrote:
> > >
> > > > > at least in some of the cases where this has been seen the cause
> > > is
> > > > > the following:
> > > > > The i915 DRM driver used to do polling for completion, busy
> > > > > waiting. It moved to be interrupt driven, which is usually better
> > > > > for power, but it will show up as more wakeups in powertop....
> > > >
> > > > IOW, this is not a regression?
> > >
> > > I don't know about this specifc case (not enough information) but for
> > > the case I described it's not a regression. Going to interrupt driven
> > > from busy waiting is an improvement not a regression :)
> >
> > Well, several thousand or more interrupts really seems like a
> > regression :). But it seems that's the same thing as the “IRQ
> > spinning” (there was a thread on dri-devel about that).
> >
> > It seems fixed with a patch from Matthew Garrett applied to
> > drm-intel/for-airlied but I don't think this has been applied to Linus
> > master.
>
> Any pointers to the patch, please?
Doesn't ring any bells for me...
--
Matthew Garrett | [email protected]
> Doesn't ring any bells for me...
This was the “irq spinning” thread on dri-devel.
--
Yves-Alexis
On Mon, Dec 08, 2008 at 05:19:49PM +0100, Yves-Alexis Perez wrote:
> > Doesn't ring any bells for me...
>
> This was the “irq spinning” thread on dri-devel.
Looks like the patch was from Keith, not me?
Unrelatedly, I didn't get the Cc:ed copy of this mail. Did you get a
bounce?
--
Matthew Garrett | [email protected]
On Mon, Dec 08, 2008 at 04:35:05PM +0000, Matthew Garrett wrote:
> On Mon, Dec 08, 2008 at 05:19:49PM +0100, Yves-Alexis Perez wrote:
> > > Doesn't ring any bells for me...
> >
> > This was the “irq spinning” thread on dri-devel.
>
> Looks like the patch was from Keith, not me?
Woops, sorry. You made so much patches for me and my backlight that I
got confused.
> Unrelatedly, I didn't get the Cc:ed copy of this mail. Did you get a
> bounce?
Yeah (and I'll get one on this too). I never managed to send you a mail,
my mailserver IP is listed on the mail-abuse RBL, I guess because it's
an ADSL line. I need to configure another way out for mails to you :)
Cheers,
--
Yves-Alexis
Hi
On Sun, Dec 07, 2008 at 09:32:56PM +0100, Rafael J. Wysocki wrote:
> The following bug entry is on the current list of known regressions
> from 2.6.27. Please verify if it still should be listed and let me know
> (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12158
> Subject : commit b1ee26b freezes system on switching from X to text console
> Submitter : Gaudenz Steinlin <[email protected]>
> Date : 2008-11-25 19:44 (13 days old)
> First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b1ee26bab14886350ba12a5c10cbc0696ac679bf
> References : http://marc.info/?l=linux-kernel&m=122764344231140&w=4
> Handled-By : Benjamin Herrenschmidt <[email protected]>
I can confirm, that this regression is worked around by commit
f3179748a157c21d44d929fd3779421ebfbeaa93 "radeonfb: Disable new color
expand acceleration unless explicitely enabled"
Gaudenz
--
Ever tried. Ever failed. No matter.
Try again. Fail again. Fail better.
~ Samuel Beckett ~