linux-kernel - RE: [git patches] libata fixes

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Date:	Sun, 11 Mar 2007 23:25:01 +0100
From:	"Paul Rolland" <rol@...917.net>
To:	"'Linus Torvalds'" <torvalds@...ux-foundation.org>
Cc:	"'Tejun Heo'" <htejun@...il.com>,
	"'Jeff Garzik'" <jeff@...zik.org>,
	"'Andrew Morton'" <akpm@...ux-foundation.org>,
	<linux-ide@...r.kernel.org>,
	"'LKML'" <linux-kernel@...r.kernel.org>,
	"'Eric D. Mudama'" <edmudama@...il.com>
Subject: RE: [git patches] libata fixes

Hello,

> > Nope... I tried several patches from Tejun, and also some 
> that Jeff posted
> > to linux-ide, but no luck. The only way to have this DVD-RW 
> working is to
> > use irqpoll on the command line...
> 
> So it has *never* worked? That's what I'm trying to see - you had a 
> "before" and "after" dmesg in one of your posts, and the "before" one 
> looked fine (as if it was working) because it didn't have the error 
> messages.
> 
> So I'm just trying to figure out where the regression started...
> 
> > To complete, here are some more output from the machine : 
> 
> What happens if you disable MSI entirely? Use "pci=nomsi" on 
> the command 
> line.
> 
> The
> 
> 	ata2.00: qc timeout (cmd 0xec)
> 	ata2.00: failed to IDENTIFY (I/O error, err_mask=0x104)
> 
> messages happen for you on the controller that claims MSI:
> 
> 	ata2: SATA max UDMA/133 cmd 0xffffc2000008a980 ctl 
> 0x0000000000000000 bmdma 0x0000000000000000 irq 504
> 
> and quite frankly, we've had lots of bugs with MSI, both in 
> hardware and 
> in software.

OK, I see, we are talking about two different problems...

My machine is having two problems : the one you are describing above,
which is due to a SIL controler being connected to one port of the ICH7
(at least, it seems to), and probing it goes  timeout, but nothing is
connected on it.

The second problem is a Jmicron363 controler that is failing to detect
the DVD-RW that is connected, unless I use the irqpoll option as Tejun has
suggested.

>From what I remember, except my initial description of the problem,
no attempt has been made yet to workaround/understand the first problem,
and all the mails I've exchanged were focused on the second one.

But, as you suggest it, I'm adding pci=nomsi to the command line....
rebooting... no change for this part of the problem.

OK, the /proc/interrupt for this config, and the dmesg attached.

3 [23:22] rol@...i:~> cat /proc/interrupts 
           CPU0       CPU1       
  0:     297549          0   IO-APIC-edge      timer
  1:          7          0   IO-APIC-edge      i8042
  4:         13          0   IO-APIC-edge      serial
  6:          5          0   IO-APIC-edge      floppy
  8:          1          0   IO-APIC-edge      rtc
  9:          0          0   IO-APIC-fasteoi   acpi
 12:        126          0   IO-APIC-edge      i8042
 14:       8313          0   IO-APIC-edge      libata
 15:          0          0   IO-APIC-edge      libata
 16:          0          0   IO-APIC-fasteoi   eth1, libata
 17:          0          0   IO-APIC-fasteoi   uhci_hcd:usb3
 18:       6894          0   IO-APIC-fasteoi   uhci_hcd:usb4
 19:        579          0   IO-APIC-fasteoi   eth0, uhci_hcd:usb5, HDA Intel
 20:        104          0   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
 21:          3          0   IO-APIC-fasteoi   ohci1394
 23:       7205          0   IO-APIC-fasteoi   libata
NMI:        783        540 
LOC:     291823     290536 

PS : I'd like to try 2.6.21-rc3, but it seems that this is breaking my
config : disk naming is no more the same, and I end up with a panic
Warning: unable to open an initial console
though i've been compiling with the same .config I was using for 2.6.21-rc2

Regards,
Paul


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