[PlanetCCRMA] Fw: [Bug 773170] [abrt] kernel: BUG: MAX_STACK_TRACE_ENTRIES too low!

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Wed Jan 11 12:23:56 PST 2012

On 01/11/2012 12:15 PM, William M. Quarles wrote:
> Fernando,
> Yes, I understand why I have the rt kernel installed, what I don't understand
> is why whenever I install the Planet CCRMA rt kernel it becomes the default
> selection in the bootloader upon installation. Traditionally on Fedora (perhaps
> ol' RHL, too, it's been a while) when a new kernel is installed it goes to the
> top of the list, but the previous default remains the same for the user to
> update, in case there are any incompatibilities with the old kernel. That was
> the "protocol" of which I spoke.

Ah, ok, thanks for the explanation.

Is this behavior new? At least in Fedora 14 the opposite is true, newly 
installed kernels are by default the default (ie: if I install a new 
Fedora kernel and immediately reboot I boot into the new kernel without 
doing anything special). As you say old kernels are kept just in case 
you need to boot into them because of a problem with the new one.

I would be surprised if Fedora has changed this behavior. Usually new 
kernel releases plug (sometimes big) security holes and having a boot go 
into the old kernel automatically would defeat the purpose of the upgrade.

-- Fernando

> I am sending the links for both of the rt kernel errors to the email address you
> specified.
> Peace,
> William
> ----- Original Message ----
> From: Fernando Lopez-Lezcano<nando at ccrma.Stanford.EDU>
> To: William M. Quarles<walrus at bellsouth.net>
> Cc: planetccrma at ccrma.Stanford.EDU
> Sent: Wed, January 11, 2012 1:23:29 PM
> Subject: Re: [PlanetCCRMA] Fw: [Bug 773170] [abrt] kernel: BUG:
> On 01/11/2012 06:25 AM, William M. Quarles wrote:
>> I didn't realize the rt kernel was set as default (seems out of protocol  for
>> new kernel to take default away from existing kernel),
> I don't quite follow. What do you mean by "out of protocol"? If you have the
> Planet CCRMA rt kernel, it is because you either installed it manually with yum
> (after adding the Planet CCRMA repositories), or installed the planetccrma-core
> package that brings it in. If you do that of course it becomes the default! (but
> you can still can boot the original Fedora kernel if you so desire). One of the
> goals of Planet CCRMA is to add the rt kernel and associated utilities for best
> rt performance.
>> but here is  bug #2 I found last night.
> Thanks. I see that this was automatically gathered by abrt... It would also be
> best to  cc' the linux-rt-users at vger.kernel.org mailing list on rt bug reports,
> those are the gurus that can solve rt related problems :-)
> -- Fernando
>> ----- Forwarded Message ----
>> From: "bugzilla at redhat.com"<bugzilla at redhat.com>
>> To: walrus at bellsouth.net
>> Sent: Wed, January 11, 2012 9:02:16 AM
>> Subject: [Bug 773170] [abrt] kernel: BUG: MAX_STACK_TRACE_ENTRIES too low!
>> Please do not reply directly to this email. All additional
>> comments should be made in the comments box of this bug.
>> https://bugzilla.redhat.com/show_bug.cgi?id=773170
>> Josh Boyer<jwboyer at redhat.com>   changed:
>>              What    |Removed                     |Added
>> ----------------------------------------------------------------------------
>>                Status|NEW                         |CLOSED
>>            Resolution|                            |NOTABUG
>>           Last Closed|                            |2012-01-11 09:02:15
>> --- Comment #1 from Josh Boyer<jwboyer at redhat.com>   2012-01-11 09:02:15 EST
> ---
>> This seems to have been hit with a hand build -rt kernel.  Fedora doesn't
> build
>> or support that, so you'll need to take this up with upstream.

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