Hi there, I'm having a problem with 2.6.36-rc8+ on HP PARISC machine (HP 9000 RP3410) where I intend to wait for SCSI enumeration during boot before LVM2 kicks in and attempts to activate the root volume. I modprobe scsi_wait_scan in the initramdisk before lvm2 script is run. However the modprobe doesn't wait. I'm on Debian testing, fwiw. [...] [ 2.368000] Freeing unused kernel memory: 252k freed Loading, please wait... [ 3.028000] udev: starting version 160 [ 4.104000] SCSI subsystem initialized [ 4.592000] sym0: <1010-66> rev 0x1 at pci 0000:20:01.0 irq 69 [ 4.668000] sym0: No NVRAM, ID 7, Fast-80, LVD, parity checking [ 4.700000] sym0: SCSI BUS has been reset. [ 4.708000] scsi0 : sym-2.2.3 [ 4.868000] sym1: <1010-66> rev 0x1 at pci 0000:20:01.1 irq 70 [ 4.868000] sym1: No NVRAM, ID 7, Fast-80, LVD, parity checking [ 4.904000] sym1: SCSI BUS has been reset. [ 4.908000] scsi1 : sym-2.2.3 [ 5.068000] sym2: <1010-66> rev 0x1 at pci 0000:80:01.0 irq 72 [ 5.072000] sym2: No NVRAM, ID 7, Fast-80, LVD, parity checking [ 5.108000] sym2: SCSI BUS has been reset. [ 5.112000] scsi2 : sym-2.2.3 [ 5.276000] sym3: <1010-66> rev 0x1 at pci 0000:80:01.1 irq 73 [ 5.276000] sym3: No NVRAM, ID 7, Fast-80, LVD, parity checking [ 5.312000] sym3: SCSI BUS has been reset. [ 5.316000] scsi3 : sym-2.2.3 Begin: Loading essential drivers ... done. Begin: Running /scripts/init-premount ... SCSI: Waiting to settle... ######### here comes modprobe scsi_wait_scan ######### SCSI: done done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... [ 6.496000] device-mapper: uevent: version 1.0.3 [ 6.496000] device-mapper: ioctl: 4.18.0-ioctl (2010-06-29) initialised: dm-devel@xxxxxxxxxx Volume group "lethal" not found Skipping volume group lethal Unable to find LVM volume lethal/root done. Begin: Waiting for root file system ... [ 7.728000] scsi 0:0:0:0: Direct-Access HP 36.4G ST336754LC HPC2 PQ: 0 ANSI: 3 [ 7.728000] scsi target0:0:0: tagged command queuing enabled, command queue depth 16. [ 7.728000] scsi target0:0:0: Beginning Domain Validation [ 7.740000] scsi target0:0:0: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 31) [ 7.748000] scsi target0:0:0: Ending Domain Validation [ 7.752000] scsi 0:0:1:0: Direct-Access HP 36.4G MAS3367NC HPC3 PQ: 0 ANSI: 3 [ 7.752000] scsi target0:0:1: tagged command queuing enabled, command queue depth 16. [ 7.760000] scsi target0:0:1: Beginning Domain Validation [ 7.764000] scsi target0:0:1: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 31) [ 7.772000] scsi target0:0:1: Ending Domain Validation [ 11.864000] sd 0:0:0:0: [sda] 71132960 512-byte logical blocks: (36.4 GB/33.9 GiB) [ 11.864000] sd 0:0:1:0: [sdb] 71132960 512-byte logical blocks: (36.4 GB/33.9 GiB) [ 11.868000] sd 0:0:0:0: [sda] Write Protect is off [ 11.892000] sd 0:0:1:0: [sdb] Write Protect is off [ 11.900000] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FUA [ 11.900000] sd 0:0:1:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA [ 11.924000] sda: unknown partition table [ 11.940000] sdb: sdb1 sdb2 sdb3 [ 11.944000] sd 0:0:0:0: [sda] Attached SCSI disk [ 11.964000] sd 0:0:1:0: [sdb] Attached SCSI disk done. Gave up waiting for root device. Common problems: - Boot args (cat /proc/cmdline) - Check rootdelay= (did the system wait long enough?) - Check root= (did the system wait for the right device?) - Missing modules (cat /proc/modules; ls /dev) ALERT! /dev/mapper/lethal-root does not exist. Dropping to a shell! Apparently /dev/sda and /dev/sdb were discovered long after scsi_wait_scan was loaded. Here are the relevant modules: [...] ext3 203543 2 jbd 63990 1 ext3 dm_mod 112954 9 scsi_wait_scan 983 0 zalon7xx 38131 0 lasi700 2427 0 53c700 39777 1 lasi700 hilkbd 5901 0 sd_mod 49383 3 crc_t10dif 1564 1 sd_mod sym53c8xx 104303 2 scsi_transport_spi 34731 3 zalon7xx,53c700,sym53c8xx scsi_mod 193802 7 libata,zalon7xx,lasi700,53c700,sd_mod,sym53c8xx,scsi_transport_spi When I unset CONFIG_SCSI_SCAN_ASYNC it works just fine and all the disks are found in time for LVM. Is that a bug in the SCSI driver? Or am I doing something wrong? It's not a recent regression, at least 2.6.35 behaves the same on that machine. Thanks! Michal -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
