[ANNOUNCE] 3.4.75-rt93

[ANNOUNCE] 3.4.75-rt93

[Steven Rostedt]

Dear RT Folks,

I'm pleased to announce the 3.4.75-rt93 stable release.


This release is just an update to the new stable 3.4.75 version
and no RT specific changes have been made.


You can get this release via the git tree at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git

  branch: v3.4-rt
  Head SHA1: 9d111c9c3814158097723d27029a9d214a8cd20e


Or to build 3.4.75-rt93 directly, the following patches should be applied:

  http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.4.tar.xz

  http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.4.75.xz

  http://www.kernel.org/pub/linux/kernel/projects/rt/3.4/patch-3.4.75-rt93.patch.xz




Enjoy,

-- Steve

[3.4.75-rt93] ftrace failed to modify ftrace_swap_recs

[Matthias Klein]

Hello,

I updated from 3.4.69-rt86 to 3.4.75-rt93 on an iMX.537 ARM platform.

Basically the kernel works but I get the following error messages during 
boot:


Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
ftrace: allocating 13405 entries in 40 pages
------------[ cut here ]------------
WARNING: at kernel/trace/ftrace.c:1589 ftrace_bug+0x74/0x174()
Modules linked in:
Backtrace:
[<c0011bfc>] (dump_backtrace+0x0/0x10c) from [<c030dde4>] 
(dump_stack+0x20/0x24)
  r6:c0073060 r5:00000009 r4:00000000 r3:271ae957
[<c030ddc4>] (dump_stack+0x0/0x24) from [<c001f268>] 
(warn_slowpath_common+0x5c/0x74)
[<c001f20c>] (warn_slowpath_common+0x0/0x74) from [<c001f33c>] 
(warn_slowpath_null+0x2c/0x34)
  r8:000008c9 r7:60000153 r6:df807bc0 r5:c0071268 r4:c048a3a0
r3:00000009
[<c001f310>] (warn_slowpath_null+0x0/0x34) from [<c0073060>] 
(ftrace_bug+0x74/0x174)
[<c0072fec>] (ftrace_bug+0x0/0x174) from [<c0073600>] 
(ftrace_process_locs+0x39c/0x474)
  r5:c04d0f40 r4:00000000
[<c0073264>] (ftrace_process_locs+0x0/0x474) from [<c0426880>] 
(ftrace_init+0x98/0x1a4)
[<c04267e8>] (ftrace_init+0x0/0x1a4) from [<c041b7d0>] 
(start_kernel+0x294/0x2dc)
  r8:70004059 r7:c0911e80 r6:c043aeac r5:ffffffff r4:c0456860
[<c041b53c>] (start_kernel+0x0/0x2dc) from [<70008040>] (0x70008040)
  r7:c0459764 r6:c043aea8 r5:c0456050 r4:10c53c7d
---[ end trace 0000000000000001 ]---
ftrace failed to modify [<c0071268>] ftrace_swap_recs+0x2c/0x3c
  actual: 07:00:8e:e8
Setting up static identity map for 0x703136b8 - 0x70313710
devtmpfs: initialized

Has someone a tip whats the problem ?


Best regards,

Matthias


------ Originalnachricht ------
Von: "Steven Rostedt" <rostedt@goodmis.org>
An: "LKML" <linux-kernel@vger.kernel.org>; "linux-rt-users" 
<linux-rt-users@vger.kernel.org>
Cc: "Thomas Gleixner" <tglx@linutronix.de>; "Carsten Emde" 
<C.Emde@osadl.org>; "John Kacur" <jkacur@redhat.com>; "Sebastian Andrzej 
Siewior" <bigeasy@linutronix.de>
Gesendet: 04.01.2014 03:33:08
Betreff: [ANNOUNCE] 3.4.75-rt93
>
>Dear RT Folks,
>
>I'm pleased to announce the 3.4.75-rt93 stable release.
>
>
>This release is just an update to the new stable 3.4.75 version
>and no RT specific changes have been made.
>
>
>You can get this release via the git tree at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git
>
>   branch: v3.4-rt
>   Head SHA1: 9d111c9c3814158097723d27029a9d214a8cd20e
>
>
>Or to build 3.4.75-rt93 directly, the following patches should be 
>applied:
>
>   http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.4.tar.xz
>
>   http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.4.75.xz
>
>   
>http://www.kernel.org/pub/linux/kernel/projects/rt/3.4/patch-3.4.75-rt93.patch.xz
>
>
>
>
>Enjoy,
>
>-- Steve
>
>--
>To unsubscribe from this list: send the line "unsubscribe 
>linux-rt-users" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at http://vger.kernel.org/majordomo-info.html
>

Re: [3.4.75-rt93] ftrace failed to modify ftrace_swap_recs

[Steven Rostedt]

Don't be afraid to include me on Cc's. You'll get a quicker answer.

On Mon, 06 Jan 2014 08:03:02 +0000
"Matthias Klein" <matthias.klein@optimeas.de> wrote:

> Hello,
> 
> I updated from 3.4.69-rt86 to 3.4.75-rt93 on an iMX.537 ARM platform.
> 
> Basically the kernel works but I get the following error messages during 
> boot:
> 
> 
> Mount-cache hash table entries: 512
> CPU: Testing write buffer coherency: ok
> ftrace: allocating 13405 entries in 40 pages
> ------------[ cut here ]------------
> WARNING: at kernel/trace/ftrace.c:1589 ftrace_bug+0x74/0x174()
> Modules linked in:
> Backtrace:
> [<c0011bfc>] (dump_backtrace+0x0/0x10c) from [<c030dde4>] 
> (dump_stack+0x20/0x24)
>   r6:c0073060 r5:00000009 r4:00000000 r3:271ae957
> [<c030ddc4>] (dump_stack+0x0/0x24) from [<c001f268>] 
> (warn_slowpath_common+0x5c/0x74)
> [<c001f20c>] (warn_slowpath_common+0x0/0x74) from [<c001f33c>] 
> (warn_slowpath_null+0x2c/0x34)
>   r8:000008c9 r7:60000153 r6:df807bc0 r5:c0071268 r4:c048a3a0
> r3:00000009
> [<c001f310>] (warn_slowpath_null+0x0/0x34) from [<c0073060>] 
> (ftrace_bug+0x74/0x174)
> [<c0072fec>] (ftrace_bug+0x0/0x174) from [<c0073600>] 
> (ftrace_process_locs+0x39c/0x474)
>   r5:c04d0f40 r4:00000000
> [<c0073264>] (ftrace_process_locs+0x0/0x474) from [<c0426880>] 
> (ftrace_init+0x98/0x1a4)
> [<c04267e8>] (ftrace_init+0x0/0x1a4) from [<c041b7d0>] 
> (start_kernel+0x294/0x2dc)
>   r8:70004059 r7:c0911e80 r6:c043aeac r5:ffffffff r4:c0456860
> [<c041b53c>] (start_kernel+0x0/0x2dc) from [<70008040>] (0x70008040)
>   r7:c0459764 r6:c043aea8 r5:c0456050 r4:10c53c7d
> ---[ end trace 0000000000000001 ]---
> ftrace failed to modify [<c0071268>] ftrace_swap_recs+0x2c/0x3c
>   actual: 07:00:8e:e8
> Setting up static identity map for 0x703136b8 - 0x70313710
> devtmpfs: initialized
> 
> Has someone a tip whats the problem ?

Strange, it tried to convert ftrace_swap_recs, but that should not have
been even in the table to modify, as ftrace_swap_recs is in ftrace.c,
which disables all -pg added in the compile.

Try a make clean and build again. Something may have been screwed up in
the compile.

-- Steve