2.4.0test13 + Dual G4

2.4.0test13 + Dual G4

[Chris Backas]

Hello all,

As per the advice from various list members (thanks all who responded!) regarding my random-coredumps under 2.2.18 in SMP mode, I've now upgraded to kernel 2.4.0
Test 13.  I was unable to build it myself (unresolved references in the link step that I couldn't figure out) I grabbed a pre-built SMP kernel from
ftp.linuxppc.org/users/kfukui.

The kernel worked fairly well, (and was REALLY REALLY FAST!) but something went wrong with XFree86 (4.0.1) and my screen went blank and wouldn't return.  Sooo... I
upgraded to Xfree86 4.0.2 from the same source.  Once I fixed a bad symlink that the RPM created (X linked to XPMac instead of XFree86) XFree worked again.

SO, getting to the point of the mail - with the newest kernel and newest XFree, my mysterious crashes still exist.  Mozilla Mail is the biggest culprit, nearly every time I open
it it dies.  No core, it just disappears.  This does not happen on a Uni-processor kernel.

My question is, when a program dies on an SMP kernel, but it fine under a Uni processor kernel, should I assume that the application has SMP issues and report it to the
author(s), or is it a kernel bug?

Thanks!
Chris Backas


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Re: 2.4.0test13 + Dual G4

[Kaoru Fukui]

From: "Chris Backas" <cbackas@rcn.com>
To: "linuxppc-dev@lists.linuxppc.org" <linuxppc-dev@lists.linuxppc.org>
Subject: 2.4.0test13 + Dual G4
Date: Fri, 22 Dec 2000 17:22:29 -0500 (EST)

>
> Hello all,
>
> As per the advice from various list members (thanks all who responded!) regarding
my random-coredumps under 2.2.18 in SMP mode, I've now upgraded to kernel 2.4.0
> Test 13.  I was unable to build it myself (unresolved references in the link
step that I couldn't figure out) I grabbed a pre-built SMP kernel from
> ftp.linuxppc.org/users/kfukui.
>

The link problem was fixed on 2.4.0-test13-pre3.
Get again bk tree linux_2_5

Kaoru


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Re: 2.4.0test13 + Dual G4

[Benjamin Herrenschmidt]

>As per the advice from various list members (thanks all who responded!)
>regarding my random-coredumps under 2.2.18 in SMP mode, I've now upgraded
>to kernel 2.4.0
>Test 13.  I was unable to build it myself (unresolved references in the
>link step that I couldn't figure out) I grabbed a pre-built SMP kernel from
>ftp.linuxppc.org/users/kfukui.
>
>The kernel worked fairly well, (and was REALLY REALLY FAST!) but
>something went wrong with XFree86 (4.0.1) and my screen went blank and
>wouldn't return.  Sooo... I
>upgraded to Xfree86 4.0.2 from the same source.  Once I fixed a bad
>symlink that the RPM created (X linked to XPMac instead of XFree86) XFree
>worked again.
>
>SO, getting to the point of the mail - with the newest kernel and newest
>XFree, my mysterious crashes still exist.  Mozilla Mail is the biggest
>culprit, nearly every time I open
>it it dies.  No core, it just disappears.  This does not happen on a Uni-
>processor kernel.

Two things come to my mind:

 - Paul fixed another SMP issues very recently. Make sure you get the
linuxppc_2_3 (or eventually _2_5) tree from hq.fsmlabs.com to get the fix

 - There are some issues with XFree 4. vs. Linux SMP (generic issues on
x86 too) that have been discussed several times on XFree list. XFree
people tend to say it's a kernel problem, while nobody (AFAIK) on the
kernel camp have made any comment.

Ben.


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Re: 2.4.0test13 + Dual G4

[Kaoru Fukui]

From: Benjamin Herrenschmidt <bh40@calva.net>
To: Chris Backas <cbackas@bigfoot.com>, <linuxppc-dev@lists.linuxppc.org>,<
linuxppc-dev@lists.linuxppc.org>

>
>  - Paul fixed another SMP issues very recently. Make sure you get the
> linuxppc_2_3 (or eventually _2_5) tree from hq.fsmlabs.com to get the fix
>

Yesterday linux_2_5`s source was broken for SMP.
SingleCPU kernel was very well.

Now I'm puting kernel-2.4.0-test13pre3ac4 from linux_2_3.

Kaoru


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Re: 2.4.0test13 + Dual G4

[Benjamin Herrenschmidt]

>Yesterday linux_2_5`s source was broken for SMP.
>SingleCPU kernel was very well.
>
>Now I'm puting kernel-2.4.0-test13pre3ac4 from linux_2_3.

Be careful not to mismatch linux_2_3 and linuxppc_2_3. These are 2
different trees on fsmlabs.com. (linux_2_3 is linus tree while
linuxppc_2_3 is the PPC tree). It's possible that Paul's latest SMP fixes
did not yet make it into _2_5.

Ben.


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Re: 2.4.0test13 + Dual G4

[Kaoru Fukui]

From: Benjamin Herrenschmidt <bh40@calva.net>
To: Kaoru Fukui <k_fukui@highway.ne.jp>, <linuxppc-dev@lists.linuxppc.org>
Subject: Re: 2.4.0test13 + Dual G4
Date: Wed, 27 Dec 2000 10:55:32 +0100

> >Yesterday linux_2_5`s source was broken for SMP.
> >SingleCPU kernel was very well.
> >
> >Now I'm puting kernel-2.4.0-test13pre3ac4 from linux_2_3.
>
> Be careful not to mismatch linux_2_3 and linuxppc_2_3. These are 2
> different trees on fsmlabs.com. (linux_2_3 is linus tree while
> linuxppc_2_3 is the PPC tree). It's possible that Paul's latest SMP fixes
> did not yet make it into _2_5.
>
> Ben.

Thanks Ben.

I'm struggling with bk tree 5000 linuxppc_2_3.

The source was able to run as singleCPU.
it's good working mono cpu.
The compilation is no problem,
 I set SMP flag ,then the compilation have done,
but the kernel say one cpu.

Kaoru


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Re: 2.4.0test13 + Dual G4

[Kaoru Fukui]

From: Kaoru Fukui <k_fukui@highway.ne.jp>

>  I set SMP flag ,then the compilation have done,
> but the kernel say one cpu.

Sorry i didn't say my machine.

my machine is Dual g4

Kaoru


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