Re: Kernel 3.10.x will be new longterm in Th

2013-11-19 Thread Jan Rękorajski
On Tue, 19 Nov 2013, Jacek Konieczny wrote:

> On Mon, 18 Nov 2013 22:31:28 +0100
> Jan Rękorajski  wrote:
> > Could all owners of the intel graphics cards test 3.10.19-4 kernel
> > package available in th-test? I applied a patch that attempts to
> > fix/workaround black screen problems.
> 
> Works for me:
> 
> 00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express
> Integrated Graphics Controller (rev 02)
> 
> Though I have never seen a 'black screen' problem on this machine. I had
> many other i915 driver problems here, though.

Good to know, at least the patch doesn't seem break anything :)

> There is other thing, though. During the file-system check on boot (I
> had quite an uptime here before rebooting) I got:
> 
> [  360.983319] INFO: task kworker/u16:4:361 blocked for more than 120 seconds.
[...]
> 
> That looks scary, but the system started properly in the end.

Looks like just threads waiting for device, if those task got unstuck
eventually then I wouldn't worry.

-- 
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Re: Kernel 3.10.x will be new longterm in Th

2013-11-19 Thread Jacek Konieczny
On Mon, 18 Nov 2013 22:31:28 +0100
Jan Rękorajski  wrote:
> Could all owners of the intel graphics cards test 3.10.19-4 kernel
> package available in th-test? I applied a patch that attempts to
> fix/workaround black screen problems.

Works for me:

00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express
Integrated Graphics Controller (rev 02)

Though I have never seen a 'black screen' problem on this machine. I had
many other i915 driver problems here, though.


There is other thing, though. During the file-system check on boot (I
had quite an uptime here before rebooting) I got:

[  360.983319] INFO: task kworker/u16:4:361 blocked for more than 120 seconds.
[  360.986155] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  360.988993] kworker/u16:4   D f6969f80 0   361  2 0x
[  360.991846] Workqueue: writeback bdi_writeback_workfn (flush-254:9)
[  360.994675]  f64edc10 0046  f6969f80 f64edc20 c16fd1c0 35672000 
0020
[  360.997532]  c16fd1c0 f6d6f1c0 f69f4b70 f64edbe0 c1229e93 f64edc10 c158cc22 
c158cc22
[  361.000385]  0086 f3c98001 f3c98000 f3c98000 c1628120 f64edbf8 c1051c8e 
f3c98000
[  361.003235] Call Trace:
[  361.006039]  [] ? format_decode+0x323/0x390
[  361.008862]  [] ? internal_add_timer+0xe/0x30
[  361.011737]  [] ? ktime_get_ts+0x3f/0x110
[  361.014519]  [] schedule+0x1e/0x50
[  361.014521]  [] io_schedule+0x73/0xb0
[  361.014524]  [] sleep_on_page+0x8/0x10
[  361.014526]  [] __wait_on_bit_lock+0x41/0x90
[  361.014528]  [] ? find_get_pages_tag+0x92/0x100
[  361.014529]  [] ? filemap_fdatawait+0x60/0x60
[  361.014531]  [] __lock_page+0x76/0x80
[  361.014534]  [] ? autoremove_wake_function+0x40/0x40
[  361.014554]  [] ext4_num_dirty_pages.isra.39+0x18f/0x1a0 [ext4]
[  361.014559]  [] ? pagevec_lookup_tag+0x22/0x30
[  361.014570]  [] ext4_da_writepages+0x4f0/0x560 [ext4]
[  361.014572]  [] ? mapping_tagged+0x10/0x10
[  361.014574]  [] ? dequeue_task_fair+0x208/0x630
[  361.014576]  [] ? update_group_power+0x1f1/0x230
[  361.014579]  [] ? cpumask_next_and+0x28/0x40
[  361.014581]  [] ? find_busiest_group+0x11e/0x980
[  361.014583]  [] do_writepages+0x15/0x40
[  361.014586]  [] __writeback_single_inode+0x37/0x1d0
[  361.014588]  [] writeback_sb_inodes+0x15d/0x2d0
[  361.014590]  [] __writeback_inodes_wb+0x74/0xb0
[  361.014592]  [] wb_writeback+0x1ea/0x260
[  361.014595]  [] ? get_nr_inodes+0x39/0x50
[  361.014597]  [] wb_do_writeback+0x19a/0x1a0
[  361.014598]  [] ? vsnprintf+0x166/0x390
[  361.014601]  [] bdi_writeback_workfn+0x6a/0x170
[  361.014603]  [] process_one_work+0x105/0x330
[  361.014605]  [] ? start_worker+0x20/0x30
[  361.014607]  [] ? manage_workers.isra.26+0x1a5/0x250
[  361.014609]  [] worker_thread+0xf9/0x330
[  361.014610]  [] ? manage_workers.isra.26+0x250/0x250
[  361.014613]  [] kthread+0x8f/0xa0
[  361.014615]  [] ret_from_kernel_thread+0x1b/0x28
[  361.014618]  [] ? kthread_create_on_node+0xc0/0xc0
[  361.014623] INFO: task jbd2/dm-9-8:589 blocked for more than 120 seconds.
[  361.014624] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  361.014626] jbd2/dm-9-8 D f67b8034 0   589  2 0x
[  361.014630]  ef11fe44 0046  f67b8034 f6d6f208 c16fd1c0 ad504ed0 
0020
[  361.014633]  c16fd1c0 f6d7d1c0 f67b8000 c1071e35 f6d6f760 0001 f6d6f208 
0039
[  361.014636]   e6bf19b3 000c   b40e 0014 
0246
[  361.014636] Call Trace:
[  361.014640]  [] ? sched_clock_local+0x45/0x140
[  361.014642]  [] ? prepare_to_wait+0x43/0x70
[  361.014643]  [] schedule+0x1e/0x50
[  361.014650]  [] jbd2_journal_commit_transaction+0x1c8/0x1620 [jbd2]
[  361.014653]  [] ? __switch_to+0xde/0x350
[  361.014655]  [] ? wake_up_bit+0x20/0x20
[  361.014656]  [] ? lock_timer_base.isra.36+0x1e/0x40
[  361.014658]  [] ? try_to_del_timer_sync+0x3d/0x50
[  361.014664]  [] kjournald2+0x9b/0x200 [jbd2]
[  361.014666]  [] ? wake_up_bit+0x20/0x20
[  361.014671]  [] ? commit_timeout+0x10/0x10 [jbd2]
[  361.014673]  [] kthread+0x8f/0xa0
[  361.014676]  [] ret_from_kernel_thread+0x1b/0x28
[  361.014678]  [] ? kthread_create_on_node+0xc0/0xc0
[  361.014679] INFO: task systemd-readahe:643 blocked for more than 120 seconds.
[  361.014680] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  361.014682] systemd-readahe D f65eecbc 0   643  1 0x
[  361.014685]  f696592c 0082  f65eecbc f65eec28 c16fd1c0 3568 
f674
[  361.014688]  c16fd1c0 f6d7d1c0 f67be610 c11ff979 f6965918 f6965908 c1201db3 

[  361.014691]    0001 f6965918 f674  f6965934 
0286
[  361.014691] Call Trace:
[  361.014693]  [] ? __blk_run_queue+0x29/0x40
[  361.014695]  [] ? queue_unplugged+0x23/0x80
[  361.014698]  [] ? generic_block_bmap+0x60/0x60
[  361.014699]  [] schedule+0x1e/0x50
[  361.014701]  [] io_schedule+0x73/0xb0
[  361.014703]  [] sleep_on_buffer+0x8/0x10
[  361.014704]  [

Re: Kernel 3.10.x will be new longterm in Th

2013-11-18 Thread Jan Rękorajski
Could all owners of the intel graphics cards test 3.10.19-4 kernel
package available in th-test? I applied a patch that attempts to
fix/workaround black screen problems.

== lang=pl ==

Czy właściciele kart graficznych intela mogliby sprawdzić kernel 3.10.19-4
z th-test? Zaaplikowałem tam łątę, która może naprawiać problem z
czarnym ekranem.

On Fri, 15 Nov 2013, Jan Rękorajski wrote:

> Hi,
> I'm going to switch longterm kernel in Th to 3.10.x line.
> The change will happen when we have a fully functional 3.12 - that means
> I'm waiting for the updated vserver patch for 3.12.
> 
> If anyone has issues with kernel 3.10 from Th please speak up now, so we
> can fix them before the switch.
> 
> == lang=pl ==
> 
> Zamierzam zmienić longterm kernel na 3.10.x.
> Nastąpi to jak tylko będziemy mieli w pełni funkcjonalny kernel 3.12 -
> czekam tylko na łatę vserverową dla tego kernela.
> 
> Jeśli macie jakieś problemy z 3.10 dajcie znać teraz, żebyśmy mogli to
> poprawić przed zmianą.
> 
> -- 
> Jan Rękorajski | PLD/Linux
> SysAdm | http://www.pld-linux.org/
> bagginsmimuw.edu.pl
> bagginspld-linux.org
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Re: Kernel 3.10.x will be new longterm in Th

2013-11-18 Thread Michael Shigorin
On Sun, Nov 17, 2013 at 11:31:25AM +0200, Elan Ruusam?e wrote:
> --- /tmp/a12013-11-17 11:29:21.267891009 +0200
> +++ /tmp/a22013-11-17 11:29:23.847906812 +0200
[...]
> -RES:  110846538  111422847   Rescheduling interrupts
> +RES:  110846728  111423012   Rescheduling interrupts

That's ~80 extra interrupts per second, I recall a core2duo
system heating considerably more that usual when idling but
hitting the constantly-rescheduling mode...

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-17 Thread Elan Ruusamäe

On 16/11/13 22:09, Jakub Bogusz wrote:

There is also some issue with blank X display (intel hardware); I'm
> > >not sure if it's related to kernel driver, new X.org server/driver or
> > >new gdm.

> >
> >It may be the GDM problem I wrote some time ago.
> >
> >Do you have GNOME/Metacity themes installed?

>
>There are metacity-theme-Simple and gnome-themes-standard and old
>gnome-theme package (2.34).
>GDM shows only blinking cursor (both on 2.6.38.8 and longterm-3.4.x;
>IIRC 3.10.x was even worse).
>

> >And with systemd GDM must be started from a systemd unit ??? testing
> >'manually' from root session won't work.

>
>No systemd running.

gdm 3.10 doesn't work regardless of kernel.
gdm2.20 + GNOME 3.10 generally works (although UX is worse than with
GNOME 2 for me... maybe I should try with MATE in this case)


MATE doesn't have DM, but i suggest try lxdm or lightdm. lxdm looks 
ugly, lightdm misses icons, but they at least work.


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Re: Kernel 3.10.x will be new longterm in Th

2013-11-17 Thread Elan Ruusamäe

On 16/11/13 14:55, Michael Shigorin wrote:

Try watching good old /proc/interrupts?


don't really know what to watch there. usual counters increase

   CPU0   CPU1
  0: 47  0   IO-APIC-edge  timer
  1:  0  0   IO-APIC-edge  i8042
  8: 21 22   IO-APIC-edge  rtc0
  9:  0  0   IO-APIC-fasteoi   acpi
 14: 86 87   IO-APIC-edge  ata_piix
 15:  0  0   IO-APIC-edge  ata_piix
 17:11182961118767   IO-APIC-fasteoi   aacraid
 20:  0  0   IO-APIC-fasteoi   i801_smbus
 22:  0  0   IO-APIC-fasteoi   uhci_hcd:usb3
 23:32449833245640   IO-APIC-fasteoi   ehci_hcd:usb1, 
uhci_hcd:usb2, uhci_hcd:usb4

 41:  2  2   PCI-MSI-edge  ioat-msi
 42:   96847899   96845988   PCI-MSI-edge  eth0
 43:44259504426732   PCI-MSI-edge  eth1
NMI:  24567  20100   Non-maskable interrupts
LOC:  108693427   93784531   Local timer interrupts
SPU:  0  0   Spurious interrupts
PMI:  24566  20099   Performance monitoring interrupts
IWI:   18092899   17475898   IRQ work interrupts
RTR:  0  0   APIC ICR read retries
RES:  110846538  111422847   Rescheduling interrupts
CAL:332406   Function call interrupts
TLB:33919143480029   TLB shootdowns
TRM:  0  0   Thermal event interrupts
THR:  0  0   Threshold APIC interrupts
MCE:  0  0   Machine check exceptions
MCP:   6847   6847   Machine check polls
ERR:  0
MIS:  0

--- /tmp/a12013-11-17 11:29:21.267891009 +0200
+++ /tmp/a22013-11-17 11:29:23.847906812 +0200
@@ -8,19 +8,19 @@
  17:11182961118767   IO-APIC-fasteoi   aacraid
  20:  0  0   IO-APIC-fasteoi   i801_smbus
  22:  0  0   IO-APIC-fasteoi   uhci_hcd:usb3
- 23:32449833245640   IO-APIC-fasteoi   ehci_hcd:usb1, 
uhci_hcd:usb2, uhci_hcd:usb4
+ 23:32449883245645   IO-APIC-fasteoi   ehci_hcd:usb1, 
uhci_hcd:usb2, uhci_hcd:usb4

  41:  2  2   PCI-MSI-edge  ioat-msi
- 42:   96847899   96845988   PCI-MSI-edge  eth0
- 43:44259504426732   PCI-MSI-edge  eth1
+ 42:   96848041   96846130   PCI-MSI-edge  eth0
+ 43:44259564426737   PCI-MSI-edge  eth1
 NMI:  24567  20100   Non-maskable interrupts
-LOC:  108693427   93784531   Local timer interrupts
+LOC:  108693570   93784674   Local timer interrupts
 SPU:  0  0   Spurious interrupts
 PMI:  24566  20099   Performance monitoring interrupts
-IWI:   18092899   17475898   IRQ work interrupts
+IWI:   18092921   17475923   IRQ work interrupts
 RTR:  0  0   APIC ICR read retries
-RES:  110846538  111422847   Rescheduling interrupts
+RES:  110846728  111423012   Rescheduling interrupts
 CAL:332406   Function call interrupts
-TLB:33919143480029   TLB shootdowns
+TLB:33919193480035   TLB shootdowns
 TRM:  0  0   Thermal event interrupts
 THR:  0  0   Threshold APIC interrupts
 MCE:  0  0   Machine check exceptions

# uptime
 11:30:22 up 23 days, 18:34,  5 users,  load average: 1.03, 1.04, 1.05


--
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Re: Kernel 3.10.x will be new longterm in Th

2013-11-16 Thread Jakub Bogusz
On Fri, Nov 15, 2013 at 09:08:45PM +0100, Jakub Bogusz wrote:
> On Fri, Nov 15, 2013 at 05:52:19PM +0100, Jacek Konieczny wrote:
> > On Fri, 15 Nov 2013 17:03:14 +0100
> > Jakub Bogusz  wrote:
> 
> As for wistron-btns - 3.4 behaves the same, but at least the reason is
> known: "kernel tried to execute NX-protected page".

Fixed on LINUX_3_10 branch and master.

> > > There is also some issue with blank X display (intel hardware); I'm
> > > not sure if it's related to kernel driver, new X.org server/driver or
> > > new gdm.
> > 
> > It may be the GDM problem I wrote some time ago.
> > 
> > Do you have GNOME/Metacity themes installed?
> 
> There are metacity-theme-Simple and gnome-themes-standard and old
> gnome-theme package (2.34).
> GDM shows only blinking cursor (both on 2.6.38.8 and longterm-3.4.x;
> IIRC 3.10.x was even worse).
> 
> > And with systemd GDM must be started from a systemd unit ??? testing
> > 'manually' from root session won't work.
> 
> No systemd running.

gdm 3.10 doesn't work regardless of kernel.
gdm2.20 + GNOME 3.10 generally works (although UX is worse than with
GNOME 2 for me... maybe I should try with MATE in this case)


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Re: Kernel 3.10.x will be new longterm in Th

2013-11-16 Thread Michael Shigorin
On Sat, Nov 16, 2013 at 01:08:12PM +0200, Elan Ruusam?e wrote:
> >>i have 100% cpu issue
> >(CONFIG_INTEL_MEI_ME is strongly advised to be disabled
> CONFIG_INTEL_MEI_ME=y
> 
> it's logging where? my dmesg and /var/log are not showing
> anything "interesting" need to google probably :P

Then it's not probably; my laptop seems to have got the hardware
it tries to set up and the logging is insane (it did hit
/var/log/messages on this particular system).

Try watching good old /proc/interrupts?

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-16 Thread Elan Ruusamäe

On 15/11/13 23:30, Michael Shigorin wrote:

On Fri, Nov 15, 2013 at 02:16:59PM +0200, Elan Ruusam??e wrote:

i have 100% cpu issue

grep mei_me /proc/modules
?

(CONFIG_INTEL_MEI_ME is strongly advised to be disabled at this
time as its logging is completely insane, it can spew several
hundred lines a second)


it's not present as module, but seems to be present as config:

# grep -c mei_me /proc/modules
0

# zgrep CONFIG_INTEL_MEI_ME /proc/config.gz
CONFIG_INTEL_MEI_ME=y

it's logging where? my dmesg and /var/log are not showing anything 
"interesting"

need to google probably :P

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Michael Shigorin
On Fri, Nov 15, 2013 at 05:03:14PM +0100, Jakub Bogusz wrote:
> There is also some issue with blank X display (intel hardware);
> I'm not sure if it's related to kernel driver, new X.org
> server/driver or new gdm.

https://bugzilla.kernel.org/show_bug.cgi?id=59841
https://bugs.freedesktop.org/show_bug.cgi?id=71493
https://bugzilla.altlinux.org/show_bug.cgi?id=28554 [ru]

PS re mei_me: https://bugzilla.altlinux.org/29369 [ru]

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Michael Shigorin
On Fri, Nov 15, 2013 at 02:16:59PM +0200, Elan Ruusam??e wrote:
> i have 100% cpu issue

grep mei_me /proc/modules
?

(CONFIG_INTEL_MEI_ME is strongly advised to be disabled at this
time as its logging is completely insane, it can spew several
hundred lines a second)

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Michael Shigorin
On Fri, Nov 15, 2013 at 08:44:08AM +0100, Jan R??korajski wrote:
> If anyone has issues with kernel 3.10 from Th please speak up
> now, so we can fix them before the switch.

I've got a few problems when upgrading ALT kernels:
- 3.4 to 3.7 => https://bugs.freedesktop.org/show_bug.cgi?id=71493
- 3.7 to 3.9 => https://bugzilla.kernel.org/show_bug.cgi?id=59841
- intel_pstate is somewhat controversial on a laptop as well

Running 3.10.x for quite a few weeks is more or less OK here.

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Jakub Bogusz
On Fri, Nov 15, 2013 at 05:52:19PM +0100, Jacek Konieczny wrote:
> On Fri, 15 Nov 2013 17:03:14 +0100
> Jakub Bogusz  wrote:

As for wistron-btns - 3.4 behaves the same, but at least the reason is
known: "kernel tried to execute NX-protected page".

Is it global protection for some data areas, or can be disabled for
particular addresses by some function call, missing in wistron-btns module?
(I think there should be a way to call some PC BIOS code from kernel)

> > There is also some issue with blank X display (intel hardware); I'm
> > not sure if it's related to kernel driver, new X.org server/driver or
> > new gdm.
> 
> It may be the GDM problem I wrote some time ago.
> 
> Do you have GNOME/Metacity themes installed?

There are metacity-theme-Simple and gnome-themes-standard and old
gnome-theme package (2.34).
GDM shows only blinking cursor (both on 2.6.38.8 and longterm-3.4.x;
IIRC 3.10.x was even worse).

> And with systemd GDM must be started from a systemd unit ??? testing
> 'manually' from root session won't work.

No systemd running.


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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Jacek Konieczny
On Fri, 15 Nov 2013 17:03:14 +0100
Jakub Bogusz  wrote:
> There is also some issue with blank X display (intel hardware); I'm
> not sure if it's related to kernel driver, new X.org server/driver or
> new gdm.

It may be the GDM problem I wrote some time ago.

Do you have GNOME/Metacity themes installed?

And with systemd GDM must be started from a systemd unit – testing
'manually' from root session won't work.

Greets,
Jacek
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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Jakub Bogusz
On Fri, Nov 15, 2013 at 08:44:08AM +0100, Jan Rękorajski wrote:
> Hi,
> I'm going to switch longterm kernel in Th to 3.10.x line.
> The change will happen when we have a fully functional 3.12 - that means
> I'm waiting for the updated vserver patch for 3.12.
> 
> If anyone has issues with kernel 3.10 from Th please speak up now, so we
> can fix them before the switch.

wistron-btns module oopses during load (on Amilo Pro 8210; module is
needed to unblock hardware rfkill on this machine).
I'll check 3.4 later; previously there was some late 2.6.x on this
laptop.

There is also some issue with blank X display (intel hardware); I'm not
sure if it's related to kernel driver, new X.org server/driver or new gdm.


-- 
Jakub Boguszhttp://qboosh.pl/
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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Elan Ruusamäe

On 15.11.2013 09:44, Jan Rękorajski wrote:

If anyone has issues with kernel 3.10 from Th please speak up now, so we
can fix them before the switch.

i have 100% cpu issue

# uname -rm
3.10.15-1 x86_64

top(1) shows these threads:
  PID USER  PR  NI  VIRT  RES  SHR S  %CPU %MEMTIME+ COMMAND
   13 root  20   0 000 S   0.7  0.0  86:25.93 ksoftirqd/1
3 root  20   0 000 S   0.3  0.0  60:30.63 ksoftirqd/0

# grep -c proc /proc/cpuinfo
2

machine itself does nothing, runs 1 vserver and tinydns

so far such links came up from google
https://bugzilla.redhat.com/show_bug.cgi?id=1016797
https://www.centos.org/forums/viewtopic.php?t=2918

but haven't checked any of those options so far

--
glen

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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Jan Rękorajski
On Fri, 15 Nov 2013, Tomasz Pala wrote:

> On Fri, Nov 15, 2013 at 08:44:08 +0100, Jan Rękorajski wrote:
> 
> > I'm going to switch longterm kernel in Th to 3.10.x line.
> 
> Out of curiosity, how long actually was current longterm kept?

More than a year (and you can add a few months as a master to this):

commit be782483e9c1bfcb528f64e8c3f4a04b5a5e6e15
Author: Jan Rękorajski 
Date:   Mon Sep 24 16:28:18 2012 +0200

- linux 3.4 is now longterm


-- 
Jan Rękorajski | PLD/Linux
SysAdm | http://www.pld-linux.org/
bagginsmimuw.edu.pl
bagginspld-linux.org
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Re: Kernel 3.10.x will be new longterm in Th

2013-11-15 Thread Tomasz Pala
On Fri, Nov 15, 2013 at 08:44:08 +0100, Jan Rękorajski wrote:

> I'm going to switch longterm kernel in Th to 3.10.x line.

Out of curiosity, how long actually was current longterm kept?

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Kernel 3.10.x will be new longterm in Th

2013-11-14 Thread Jan Rękorajski
Hi,
I'm going to switch longterm kernel in Th to 3.10.x line.
The change will happen when we have a fully functional 3.12 - that means
I'm waiting for the updated vserver patch for 3.12.

If anyone has issues with kernel 3.10 from Th please speak up now, so we
can fix them before the switch.

== lang=pl ==

Zamierzam zmienić longterm kernel na 3.10.x.
Nastąpi to jak tylko będziemy mieli w pełni funkcjonalny kernel 3.12 -
czekam tylko na łatę vserverową dla tego kernela.

Jeśli macie jakieś problemy z 3.10 dajcie znać teraz, żebyśmy mogli to
poprawić przed zmianą.

-- 
Jan Rękorajski | PLD/Linux
SysAdm | http://www.pld-linux.org/
bagginsmimuw.edu.pl
bagginspld-linux.org
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