Re: [Announce] 2.6.29-rt1

Hi


I've got crashes when I run an app with thread with RT priority.
This crash could happen on any comman, here some log of crashes :


First one :

server calling Oops: Exception in kernel mode, sig: 5 [#1]
PREEMPT MPC837x RR605
Modules linked in:
NIP: c0075b08 LR: c0075a50 CTR: c00d7d90
REGS: dbb6dcb0 TRAP: 0700 Not tainted (2.6.29-rt1)
MSR: 00029032 <EE,ME,CE,IR,DR> CR: 24002488 XER: 00000000
TASK = dddea1e0[1769] 'vsftpd' THREAD: dbb6c000
GPR00: 00000001 dbb6dd60 dddea1e0 df803e24 df803e10 df803e08 00000000
ddc72020
GPR08: 00000000 0000001b dddea1e0 df803e24 24000482 100bf094 00000000
c04aa6fc
GPR16: 00200200 00100100 c04e5958 c04e595c dbb6dd68 c04e0000 c04e0000
c04aa6bc
GPR24: 00000020 dbb6ddd8 00000010 df80ae00 00000000 dbb6de38 df816800
df803e00
NIP [c0075b08] cache_alloc_refill+0x180/0x62c
LR [c0075a50] cache_alloc_refill+0xc8/0x62c
Call Trace:
[dbb6dd60] [c038878c] preempt_schedule_irq+0x5c/0x80 (unreliable)
[dbb6ddd0] [c00761a0] kmem_cache_alloc+0x6c/0x140
[dbb6de00] [c002ddb4] __sigqueue_do_alloc+0xa0/0xec
[dbb6de10] [c002e2f8] send_signal+0xa4/0x224
[dbb6de30] [c002f680] do_notify_parent+0x1a8/0x1d4
[dbb6ded0] [c0025608] do_exit+0x584/0x69c
[dbb6df10] [c00257a0] do_group_exit+0x80/0xac
[dbb6df30] [c00257e0] sys_exit_group+0x14/0x28
[dbb6df40] [c00117f4] ret_from_syscall+0x0/0x38
--- Exception: c01 at 0xfef463c
LR = 0xffa5884
Instruction dump:
7f87f800 40be0018 80ff0010 38000001 901f0048 7f872000 419e00e8 80070010
813b001c 7c090010 38000000 7c000114 <0f000000> 381a0001 38c7001c 7c0903a6
---[ end trace 99200bd45c29aa91 ]---
Fixing recursive fault but reboot is needed!


Second one :
I've run my app, and after just run a simple "ifconfig"


-sh-2.05b# ifconfig
eth0 Link eOops: Exception in kernel mode, sig: 5 [#1]
PREEMPT MPC837x RR605
Modules linked in:
NIP: c0075b08 LR: c0075a50 CTR: c02cf170
REGS: dab41cb0 TRAP: 0700 Not tainted (2.6.29-rt1)
MSR: 00029032 <EE,ME,CE,IR,DR> CR: 24002488 XER: 00000000
TASK = df8be100[1756] 'ifconfig' THREAD: dab40000
GPR00: 00000001 dab41d60 df8be100 df803e24 df803e10 df803e08 00000000
dddcc000
GPR08: 00000000 0000001b df8be100 df803e24 24000482 10023370 00000000
c04aa6fc
GPR16: 00200200 00100100 c04e5958 c04e595c dab41d68 c04e0000 c04e0000
c04aa6bc
GPR24: 00000020 dab41dd8 00000010 df80ae00 00000000 dab41e38 df816800
df803e00
NIP [c0075b08] cache_alloc_refill+0x180/0x62c
LR [c0075a50] cache_alloc_refill+0xc8/0x62c
Call Trace:
[dab41d60] [00000001] 0x1 (unreliable)
[dab41dd0] [c00761a0] kmem_cache_alloc+0x6c/0x140
[dab41e00] [c002ddb4] __sigqueue_do_alloc+0xa0/0xec
[dab41e10] [c002e2f8] send_signal+0xa4/0x224
[dab41e30] [c002f680] do_notify_parent+0x1a8/0x1d4
[dab41ed0] [c0025608] do_exit+0x584/0x69c
[dab41f10] [c00257a0] do_group_exit+0x80/0xac
[dab41f30] [c00257e0] sys_exit_group+0x14/0x28
[dab41f40] [c00117f4] ret_from_syscall+0x0/0x38
--- Exception: c01 at 0xff3b63c
LR = 0xffec884
Instruction dump:
7f87f800 40be0018 80ff0010 38000001 901f0048 7f872000 419e00e8 80070010
813b001c 7c090010 38000000 7c000114 <0f000000> 381a0001 38c7001c 7c0903a6
---[ end trace f43c24570097662c ]---
Fixing recursive fault but reboot is needed!



The kernel is a 2.6.29-rt1 compiled with ltib for powerpc (mpc8377E).

Philippe



Le Thu, 26 Mar 2009 19:54:25 +0900, GeunSik Lim a écrit :

Hi,

I understood statement that Thosmas explained about invalid access of
2.6.29-rt1 soruces.
In general,
We remeber rc directory (./v2.6/testing/ and release directory (./v2.6/)
certainly.

Release Version is located in
http://www.kernel.org/pub/linux/kernel/v2.6/ site. RC Version is
located in
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ site.

I summarized quick howto per notice of "2.6.* rt patch" file. fc9#> wget
http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.29.tar.bz2
(If linux version is RC[release candidate] version,
use "wget http://www.kernel.org/pub/linux/kernel/v2.6/testing/***";
command.)
fc9#> wget
http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.29-rt1.bz2
fc9#> tar xjf ./linux-2.6.29.tar.bz2
fc9#> tar xvjf ./patch-2.6.29-rt1-broken-out.tar.bz2 fc9#> cd
./linux-2.6.29
fc9#> for i in `cat ../patches/series | grep patch | grep -v "#" `;do
echo "+++ patching $i"; patch -p1 <

../patches/$i;done
fc9#> cp ./arch/x86/configs/i386_defconfig ./.config fc9#> make
menuconfig
..... Below Omission .....


Regards,
GeunSik Lim

----- Original Message -----
From: "Thomas Gleixner" <tglx@xxxxxxxxxxxxx> To: "Jaswinder Singh
Rajput" <jaswinder@xxxxxxxxxx> Cc: "LKML"
<linux-kernel@xxxxxxxxxxxxxxx>; "rt-users"
<linux-rt-users@xxxxxxxxxxxxxxx>; "Ingo Molnar" <mingo@xxxxxxx>; "Steven
Rostedt" <rostedt@xxxxxxxxxxx>; "Peter Zijlstra" <peterz@xxxxxxxxxxxxx>;
"Carsten Emde" <ce@xxxxxxx>; "Clark Williams" <williams@xxxxxxxxxx>;
"Frank Rowand" <frank.rowand@xxxxxxxxxxx> Sent: Thursday, March 26, 2009
6:09 AM Subject: Re: [Announce] 2.6.29-rt1


On Thu, 26 Mar 2009, Jaswinder Singh Rajput wrote:

On Wed, 2009-03-25 at 21:59 +0100, Thomas Gleixner wrote:
We are pleased to announce the next update to our new preempt-rt
series.

- port forward to 2.6.29 final

Download locations:

http://rt.et.redhat.com/download/
http://www.kernel.org/pub/linux/kernel/projects/rt/

Information on the RT patch can be found at:

http://rt.wiki.kernel.org/index.php/Main_Page

to build the 2.6.29-rt1 tree, the following patches should be
applied:

http://www.kernel.org/pub/linux/kernel/v2.6/testing/
linux-2.6.29.tar.bz2

Is this valid ?

If we remove the testing/ it should work better :)

tglx
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