Re: [Wg-test-framework] linux 3.14.34 failure to detect disks on C600 storage controller

["Dugger, Donald D" <donald.d.dugger@xxxxxxxxx>]

Ian-

The other thing I would try is to get a copy of the Debian kernel sources and 
re-build them the same way you are building the 3.14 kernel.  If a hand built 
Debian kernel doesn't work then that would be solid proof the problem is the 
configuration and not the code.

I'm guessing the problem is in the initfs, typically the initfs is created 
using modules from the running system.  Are you rebuilding the 3.14 kernel on 
the failing machine or do you build it on a different system?

--
Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
Ph: 303/443-3786

-----Original Message-----
From: Ian Jackson [mailto:Ian.Jackson@xxxxxxxxxxxxx] 
Sent: Thursday, April 16, 2015 8:20 AM
To: Dugger, Donald D
Cc: wg-test-framework@xxxxxxxxxxxxxxxxxxxx
Subject: RE: linux 3.14.34 failure to detect disks on C600 storage controller

Dugger, Donald D writes ("RE: linux 3.14.34 failure to detect disks on C600 
storage controller"):
> (Responding to the email with the right list address :-)
...
> My suspicion would be that you're missing a necessary module in your locally 
> built 3.14 kernel.  The fact that the Debian kernel works and the local 
> kernel doesn't report any errors would indicate that it's just a matter of 
> something missing.

That was my thought too.  I tried quite hard to search for the right missing 
module without success.

> First I'd ask what `lsmod' on the working Debian system shows, maybe that 
> will indicate something missing.  If not we can dig deeper.

I looked through the lsmod outputs and didn't see anything that jumped out.


On Debian (passed root=/something/which/did/not/exist) to force it to fail in 
the initramfs:

(initramfs) lsmod
Module                  Size  Used by    Not tainted
ohci_hcd               26563  0
uhci_hcd               26865  0
dm_mod                 63645  2
sg                     25874  0
usbhid                 36418  0
hid                    81372  1 usbhid
sd_mod                 36136  2
crc_t10dif             12348  1 sd_mod
isci                   81333  1
libsas                 55095  1 isci
ahci                   24997  0
libahci                22941  1 ahci
libata                140630  3 libsas,ahci,libahci
scsi_transport_sas     29388  2 isci,libsas
ehci_hcd               40249  0
e1000e                133833  0
usbcore               128741  5 ohci_hcd,uhci_hcd,usbhid,ehci_hcd
scsi_mod              162321  6 sg,sd_mod,isci,libsas,libata,scsi_transport_sas
usb_common             12354  1 usbcore
(initramfs)


With my own kernel:

(initramfs) lsmod
Module                  Size  Used by    Not tainted
isci                   98016  0
e1000e                193049  0
libsas                 57832  1 isci
scsi_transport_sas     25282  2 isci,libsas
(initramfs) modprobe ohci_hcd
(initramfs) modprobe uhci_hcd
(initramfs) modprobe dm_mod
(initramfs) modprobe sg
(initramfs) modprobe usbhid
(initramfs) modprobe hid
(initramfs) modprobe sd_mod
(initramfs) modprobe crc_t10dif
(initramfs) modprobe isci
(initramfs) modprobe libsas
(initramfs) modprobe ahci
(initramfs) modprobe libahci
(initramfs) modprobe libata
(initramfs) modprobe scsi_transport_sas
(initramfs) modprobe ehci_hcd
(initramfs) modprobe e1000e
(initramfs) modprobe usbcore
(initramfs) modprobe scsi_mod
(initramfs) modprobe usb_common
(initramfs) lsmod
Module                  Size  Used by    Not tainted
crc_t10dif              1047  0
crct10dif_common        1284  1 crc_t10dif
isci                   98016  0
e1000e                193049  0
libsas                 57832  1 isci
scsi_transport_sas     25282  2 isci,libsas
(initramfs)

(The list of modprobes generated from the lsmod, above.)

Ian.

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