On Sun, Sep 03, Linus Torvalds wrote:

> 
> Things are definitely calming down, and while I'm not ready to call it a 
> final 2.6.18 yet, this migt be the last -rc.

There is a regression on LVD drives (?) since early 2.6.18rc

http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=60eef25701d25e99c991dd0f4a9f3832a0c3ad3e

I get a machine check on an older B&W G3.

<5>SCSI subsystem initialized
<6>st: Version 20050830, fixed bufsize 32768, s/g segs 256
<6>loop: loaded (max 8 devices)
<3>pmac_zilog 0.00013000:ch-b: irda_setup timed out on get_version byte
<6>scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 7.0
<4>        <Adaptec 2940B Ultra2 SCSI adapter>
<4>        aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs
<4>
<5>  Vendor: IBM       Model: DDRS-39130D       Rev: DC2A
<5>  Type:   Direct-Access                      ANSI SCSI revision: 02
<4>scsi0:A:0:0: Tagged Queuing enabled.  Depth 32
<6> target0:0:0: Beginning Domain Validation
<6> target0:0:0: wide asynchronous
<4>Machine check in kernel mode.
<4>Caused by (from SRR1=49030): Transfer error ack signal
<4>Oops: Machine check, sig: 7 [#1]
<4>
<4>Modules linked in: aic7xxx scsi_transport_spi cpufreq_ondemand loop nfs nfs_acl lockd sunrpc sg st sd_mod sr_mod scsi_mod ide_cd cdrom
<4>NIP: D21F03A0 LR: D20D9494 CTR: D21F0388
<4>REGS: cf5059f0 TRAP: 0200   Not tainted  (2.6.18-rc6-20060905-default)
<4>MSR: 00049030 <EE,ME,IR,DR>  CR: 22022242  XER: 00000000
<4>TASK = cf1d9990[963] 'insmod' THREAD: cf504000
<6>GPR00: 000000FF CF505AA0 CF1D9990 CF513400 CF505A6C CF564C00 CF564D00 00000000 
<6>GPR08: 00000001 D105C000 CF64D400 00000000 F2841C80 100290EC 0000000F D22BFB50 
<6>GPR16: 0000001E D229EDD0 CFC52500 D229EDA8 CF5139CC CF513818 CF5138BC CF513400 
<6>GPR24: CF513800 CF5139A0 FFFFFFFF C37C0000 CF5139A0 CF513800 CF513000 CF513C00 
<4>NIP [D21F03A0] ahc_linux_get_signalling+0x18/0xa8 [aic7xxx]
<4>LR [D20D9494] spi_dv_device+0x338/0x51c [scsi_transport_spi]
<4>Call Trace:
<4>[CF505AA0] [D20D9364] spi_dv_device+0x208/0x51c [scsi_transport_spi] (unreliable)
<4>[CF505AF0] [D21F0808] ahc_linux_slave_configure+0xfc/0x114 [aic7xxx]
<4>[CF505B30] [D20B71D8] scsi_probe_and_add_lun+0x8d4/0xa40 [scsi_mod]
<4>[CF505B90] [D20B78F8] __scsi_scan_target+0xd8/0x630 [scsi_mod]
<4>[CF505C20] [D20B7E9C] scsi_scan_channel+0x4c/0x9c [scsi_mod]
<4>[CF505C40] [D20B7FD4] scsi_scan_host_selected+0xe8/0x140 [scsi_mod]
<4>[CF505C70] [D21F3998] ahc_linux_register_host+0x344/0x35c [aic7xxx]
<4>[CF505D10] [D21F468C] ahc_linux_pci_dev_probe+0x1a8/0x1c8 [aic7xxx]
<4>[CF505D80] [C016A49C] pci_device_probe+0x6c/0xa0
<4>[CF505DA0] [C01F0AF4] driver_probe_device+0x60/0xf4
<4>[CF505DC0] [C01F0CC4] __driver_attach+0x8c/0xf0
<4>[CF505DE0] [C01F0424] bus_for_each_dev+0x50/0x94
<4>[CF505E10] [C01F0A08] driver_attach+0x24/0x34
<4>[CF505E20] [C01F000C] bus_add_driver+0x78/0x128
<4>[CF505E40] [C01F0FC4] driver_register+0xa0/0xb4
<4>[CF505E50] [C016A2C8] __pci_register_driver+0x4c/0x8c
<4>[CF505E60] [D21F44CC] ahc_linux_pci_init+0x20/0x38 [aic7xxx]
<4>[CF505E70] [D105A3C0] ahc_linux_init+0x3c0/0x530 [aic7xxx]
<4>[CF505EA0] [C004EB50] sys_init_module+0x1368/0x14f8
<4>[CF505F40] [C00125A4] ret_from_syscall+0x0/0x40
<4>--- Exception: c01 at 0xff698a4
<4>    LR = 0x10001100
<4>Instruction dump:
<4>38600000 4e800020 38600000 4e800020 4e800020 4e800020 814302ac 800a0000 
<4>2f800000 409e0018 812a0004 8809001f <0c000000> 4c00012c 48000028 812a0004 
<4> scsi0: PCI error Interrupt at seqaddr = 0x8
<4>scsi0: Signaled a Target Abort


Here is the dmesg from a working 2.6.16 kernel:

...
SCSI subsystem initialized
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 7.0
        <Adaptec 2940B Ultra2 SCSI adapter>
        aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs

  Vendor: IBM       Model: DDRS-39130D       Rev: DC2A
  Type:   Direct-Access                      ANSI SCSI revision: 02
scsi0:A:0:0: Tagged Queuing enabled.  Depth 32
 target0:0:0: Beginning Domain Validation
 target0:0:0: wide asynchronous
 target0:0:0: FAST-40 WIDE SCSI 80.0 MB/s ST (25 ns, offset 15)
 target0:0:0: Domain Validation skipping write tests
 target0:0:0: Ending Domain Validation
SCSI device sda: 17850000 512-byte hdwr sectors (9139 MB)
sda: Write Protect is off
sda: Mode Sense: e5 00 00 08
SCSI device sda: drive cache: write back
SCSI device sda: 17850000 512-byte hdwr sectors (9139 MB)
sda: Write Protect is off
sda: Mode Sense: e5 00 00 08
SCSI device sda: drive cache: write back
 sda: [mac] sda1 sda2 sda3 sda4 sda5 sda6
sd 0:0:0:0: Attached scsi disk sda
sd 0:0:0:0: Attached scsi generic sg0 type 0
  Vendor: IBM       Model: DNES-318350W      Rev: SA30
  Type:   Direct-Access                      ANSI SCSI revision: 03
scsi0:A:2:0: Tagged Queuing enabled.  Depth 32
 target0:0:2: Beginning Domain Validation
 target0:0:2: wide asynchronous
 target0:0:2: FAST-40 WIDE SCSI 80.0 MB/s ST (25 ns, offset 31)
 target0:0:2: Domain Validation skipping write tests
 target0:0:2: Ending Domain Validation
SCSI device sdb: 35843670 512-byte hdwr sectors (18352 MB)
sdb: Write Protect is off
sdb: Mode Sense: c3 00 00 08
SCSI device sdb: drive cache: write back
SCSI device sdb: 35843670 512-byte hdwr sectors (18352 MB)
sdb: Write Protect is off
sdb: Mode Sense: c3 00 00 08
SCSI device sdb: drive cache: write back
 sdb: [mac] sdb1 sdb2 sdb3 sdb4 sdb5 sdb6 sdb7 sdb8 sdb9 sdb10 sdb11 sdb12 sdb13
sd 0:0:2:0: Attached scsi disk sdb
sd 0:0:2:0: Attached scsi generic sg1 type 0
mesh: configured for synchronous 5 MB/s
mesh: performing initial bus reset...
scsi1 : MESH
ReiserFS: sda4: found reiserfs format "3.6" with standard journal
ReiserFS: sda4: using ordered data mode
...