[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288


Andrew Morton <akpm@linux-foundation.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |akpm@linux-foundation.org
          Component|Modules                     |Other
         AssignedTo|other_modules@kernel-bugs.o |scsi_drivers-other@kernel-b
                   |sdl.org                     |ugs.osdl.org
            Product|Other                       |SCSI Drivers




--- Comment #3 from Andrew Morton <akpm@linux-foundation.org>  2010-02-12 20:28:19 ---
I'll reassign this regression to scsi.

I reattached the most interesting jpg screenshot: scsi_async_scan got stuck.

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Re: [Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[Matthew Wilcox]

On Fri, Feb 12, 2010 at 08:28:24PM +0000, bugzilla-daemon@bugzilla.kernel.org wrote:
> --- Comment #3 from Andrew Morton <akpm@linux-foundation.org>  2010-02-12 20:28:19 ---
> I'll reassign this regression to scsi.
> 
> I reattached the most interesting jpg screenshot: scsi_async_scan got stuck.

This probably isn't anything to do with the scsi async scan (boot with
scsi_mod.scan=sync to eliminate the possibility).  It's probably a driver
failing to finish the scan.  Probably the reason for that is broken
interrupt routing.  But that's a lot of probables, so some investigation
with scsi_mod.scan=sync should be used to confirm the first hypothesis
before assigning the blame elsewhere.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."

[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288





--- Comment #4 from Matthew Wilcox <matthew@wil.cx>  2010-02-12 21:15:42 ---
On Fri, Feb 12, 2010 at 08:28:24PM +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> --- Comment #3 from Andrew Morton <akpm@linux-foundation.org>  2010-02-12 20:28:19 ---
> I'll reassign this regression to scsi.
> 
> I reattached the most interesting jpg screenshot: scsi_async_scan got stuck.

This probably isn't anything to do with the scsi async scan (boot with
scsi_mod.scan=sync to eliminate the possibility).  It's probably a driver
failing to finish the scan.  Probably the reason for that is broken
interrupt routing.  But that's a lot of probables, so some investigation
with scsi_mod.scan=sync should be used to confirm the first hypothesis
before assigning the blame elsewhere.

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[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288





--- Comment #5 from Domenico Palumbo <domenico.palumbo@ingsoft.it>  2010-02-15 12:00:54 ---
I've tried to boot adding at the end of the line the option
"scsi_mod.scan=sync", but nothing changed, except some more messages, that I'm
reporting as a screen shot "Kernel 2.6.31 boot scsi_mod.scan=sync.jpg".

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[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288





--- Comment #6 from Domenico Palumbo <domenico.palumbo@ingsoft.it>  2010-02-15 12:02:48 ---
Created an attachment (id=25046)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=25046)
Screen shot of boot using option scsi_mod.scan=sync

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Re: [Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[James Bottomley]

On Mon, 2010-02-15 at 12:02 +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> --- Comment #6 from Domenico Palumbo <domenico.palumbo@ingsoft.it>  2010-02-15 12:02:48 ---
> Created an attachment (id=25046)
>  --> (http://bugzilla.kernel.org/attachment.cgi?id=25046)
> Screen shot of boot using option scsi_mod.scan=sync

Well, the answer is at the top.  It says

aic7xxx: 0000:01:03.0: Can't find IRQ for PCI INT A; probably buggy MP
table

So this is an IRQ misrouting to the adaptec card as Matthew suspect.
The likely cause is ACPI.

James

[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288





--- Comment #7 from Anonymous Emailer <anonymous@kernel-bugs.osdl.org>  2010-02-15 15:54:53 ---
Reply-To: James.Bottomley@suse.de

On Mon, 2010-02-15 at 12:02 +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> --- Comment #6 from Domenico Palumbo <domenico.palumbo@ingsoft.it>  2010-02-15 12:02:48 ---
> Created an attachment (id=25046)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=25046)
>  --> (http://bugzilla.kernel.org/attachment.cgi?id=25046)
> Screen shot of boot using option scsi_mod.scan=sync

Well, the answer is at the top.  It says

aic7xxx: 0000:01:03.0: Can't find IRQ for PCI INT A; probably buggy MP
table

So this is an IRQ misrouting to the adaptec card as Matthew suspect.
The likely cause is ACPI.

James

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[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288


Antti Louko <diu@mail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |diu@mail.com




--- Comment #8 from Antti Louko <diu@mail.com>  2010-02-16 06:42:55 ---
This bug also applies to kernel 2.6.32.6 (vanilla, patched with grsec) with
exactly same symptoms.

The system is IBM xSeries 220 (also Pentium III Coppermine)
01:03.0 SCSI storage controller: Adaptec AIC-7892P U160/m (rev 02)

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[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288





--- Comment #9 from Domenico Palumbo <domenico.palumbo@ingsoft.it>  2010-02-17 12:33:26 ---
Sorry,
but I don't know if, after comment from James.Bottomley@suse.de, do I have to
reassign this report to ACPI "Product"?
Thanks,

    Domenico

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[Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15288


Andrew Morton <akpm@linux-foundation.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Other                       |Config-Interrupts
         AssignedTo|scsi_drivers-other@kernel-b |acpi_config-interrupts@kern
                   |ugs.osdl.org                |el-bugs.osdl.org
            Product|SCSI Drivers                |ACPI




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Re: [Bug 15288] kernel 2.6.31 loading goes in loop on IBM xSeries 330

[Yinghai Lu]

please check if

http://git.kernel.org/?p=linux/kernel/git/tip/linux-2.6-tip.git;a=commitdiff;h=18dce6ba5c8c6bd0f3ab4efa4cbdd698dab5c40a

fix the problem.

Yinghai