On Wed, 2008-07-30 at 23:24 -0700, Andrew Morton wrote:

(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Wed, 30 Jul 2008 23:18:04 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote:

quoted

http://bugzilla.kernel.org/show_bug.cgi?id=11185

           Summary: Device/host RESET in SCSI
           Product: Platform Specific/Hardware
           Version: 2.5
     KernelVersion: 2.6.26
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: PPC-64
        AssignedTo: anton@samba.org
        ReportedBy: cijoml@volny.cz


Latest working kernel version: 2.6.25, 2.6.18??? both tested are Debian
distribution kernels
Earliest failing kernel version: unknown
Distribution: Debian stable
Hardware Environment: IBM H70, PPC64 kernel
Software Environment: Debian stable, 2.6.26 self compiled

Why do you describe this regression as a powerpc problem rather than a
scsi one?

(It could be either or both, I'm just wondering...)

quoted

Problem Description:

[    3.881326] sym53c8xx 0000:00:0c.0: enabling device (0140 -> 0143)
[    3.959117] sym0: <875> rev 0x4 at pci 0000:00:0c.0 irq 17
[    4.029503] sym0: No NVRAM, ID 7, Fast-20, SE, parity checking
[    4.108967] sym0: SCSI BUS has been reset.
[    4.160753] scsi0 : sym-2.2.3
[    4.200066] sym53c8xx 0000:00:11.0: enabling device (0140 -> 0143)
[    4.278375] sym1: <895> rev 0x1 at pci 0000:00:11.0 irq 19
[    4.349340] sym1: No NVRAM, ID 7, Fast-40, SE, parity checking
[    4.429359] sym1: SCSI BUS has been reset.
[    4.481660] scsi1 : sym-2.2.3
[    4.521351] sym53c8xx 0001:40:0c.0: enabling device (0140 -> 0143)
[    4.600250] sym2: <875> rev 0x3 at pci 0001:40:0c.0 irq 29
[    4.756252] sym2: No NVRAM, ID 7, Fast-20, SE, parity checking
[    4.836739] sym2: SCSI BUS has been reset.
[    4.889450] scsi2 : sym-2.2.3

I don't know much about scsi, but I have a 44P (POWER3) which boots fine:

Linux version 2.6.27-rc1 (benh@grosgo) (gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu8
...
sym53c8xx 0000:00:0c.0: enabling device (0140 -> 0143)
sym0: <896> rev 0x7 at pci 0000:00:0c.0 irq 17
sym0: No NVRAM, ID 7, Fast-40, SE, parity checking
sym0: SCSI BUS has been reset.
scsi0 : sym-2.2.3
scsi 0:0:1:0: CD-ROM            IBM      CDRM00203        1_05 PQ: 0 ANSI: 2
 target0:0:1: Beginning Domain Validation
 target0:0:1: asynchronous
 target0:0:1: wide asynchronous
 target0:0:1: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 15)
 target0:0:1: Domain Validation skipping write tests
 target0:0:1: Ending Domain Validation
 target0:0:4: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 31)
scsi 0:0:4:0: Direct-Access     IBM      DDYS-T09170N     S96F PQ: 0 ANSI: 3
 target0:0:4: tagged command queuing enabled, command queue depth 16.
 target0:0:4: Beginning Domain Validation
 target0:0:4: asynchronous
 target0:0:4: wide asynchronous
 target0:0:4: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 31)
 target0:0:4: Domain Validation skipping write tests
 target0:0:4: Ending Domain Validation
 target0:0:5: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 31)
scsi 0:0:5:0: Direct-Access     IBM      DDYS-T09170N     S96F PQ: 0 ANSI: 3
 target0:0:5: tagged command queuing enabled, command queue depth 16.
 target0:0:5: Beginning Domain Validation
 target0:0:5: asynchronous
 target0:0:5: wide asynchronous
 target0:0:5: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, offset 31)
 target0:0:5: Domain Validation skipping write tests
 target0:0:5: Ending Domain Validation
sym53c8xx 0000:00:0c.1: enabling device (0140 -> 0143)
sym1: <896> rev 0x7 at pci 0000:00:0c.1 irq 18
sym1: No NVRAM, ID 7, Fast-40, LVD, parity checking
sym1: SCSI BUS has been reset.
scsi1 : sym-2.2.3
ipr: IBM Power RAID SCSI Device Driver version: 2.4.1 (April 24, 2007)
st: Version 20080504, fixed bufsize 32768, s/g segs 256
Driver 'st' needs updating - please use bus_type methods
Driver 'sd' needs updating - please use bus_type methods
sd 0:0:4:0: [sda] 17774160 512-byte hardware sectors (9100 MB)
sd 0:0:4:0: [sda] Write Protect is off
sd 0:0:4:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DA
sd 0:0:4:0: [sda] 17774160 512-byte hardware sectors (9100 MB)
sd 0:0:4:0: [sda] Write Protect is off
sd 0:0:4:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DA
 sda: sda1
sd 0:0:4:0: [sda] Attached SCSI disk
sd 0:0:5:0: [sdb] Spinning up disk..............ready
sd 0:0:5:0: [sdb] 17774160 512-byte hardware sectors (9100 MB)
sd 0:0:5:0: [sdb] Write Protect is off
sd 0:0:5:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DA
sd 0:0:5:0: [sdb] 17774160 512-byte hardware sectors (9100 MB)
sd 0:0:5:0: [sdb] Write Protect is off
sd 0:0:5:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DA
 sdb: sdb1 sdb2 sdb3 < sdb5 sdb6 >
sd 0:0:5:0: [sdb] Attached SCSI disk
Driver 'sr' needs updating - please use bus_type methods
sr0: scsi-1 drive
Uniform CD-ROM driver Revision: 3.20
sr 0:0:1:0: Attached scsi generic sg0 type 5
sd 0:0:4:0: Attached scsi generic sg1 type 0
sd 0:0:5:0: Attached scsi generic sg2 type 0


cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person