On 18.09.2014, at 12:03, NeilBrown <neilb@xxxxxxx> wrote: > Getting a "change" even on spindown is causing the problem I suspect. > A change in 3.3.1 causes "mdadm -I" to be run on a device when it 'changes'. > That will read from the device which will wake it up. > (commit 25392f5fc59f96fb76 - revert it and the symptom will probably go away). > > I really think the "bug" here is that the change event is emitted on > 'spindown', but maybe the bug is that the exact meaning of 'change' isn't > well documented. > > I can probably get "mdadm -I" to use O_EXCL which will fail on devices > already in an array, but I'm not sure that is a complete solution. You could > still get wakeups on other devices. > > Can you rung the 'udevadm monitor' again, but this time with '--property'. > Maybe there is some property associated with spindown events which we can use > to ignore them. > > NeilBrown sure. I also took separate logs for standby and wakeup. change events only occur when the drive goes standby (see below). strangely enough, there are no events when the drive wakes up. monitor will print the received events for: UDEV - the event which udev sends out after rule processing KERNEL - the kernel uevent KERNEL[558130.868218] change /devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:0/end_device-0:0/target0:0:0/0:0:0:0/block/sda (block) ACTION=change DEVNAME=/dev/sda DEVPATH=/devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:0/end_device-0:0/target0:0:0/0:0:0:0/block/sda DEVTYPE=disk MAJOR=8 MINOR=0 SEQNUM=3239 SUBSYSTEM=block KERNEL[558132.028485] change /devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:1/end_device-0:1/target0:0:1/0:0:1:0/block/sdb (block) ACTION=change DEVNAME=/dev/sdb DEVPATH=/devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:1/end_device-0:1/target0:0:1/0:0:1:0/block/sdb DEVTYPE=disk MAJOR=8 MINOR=16 SEQNUM=3240 SUBSYSTEM=block UDEV [558139.263973] change /devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:0/end_device-0:0/target0:0:0/0:0:0:0/block/sda (block) ACTION=change DEVLINKS=/dev/disk/by-id/ata-WDC_WD20EARS-00S8B1_WD-WCAVY1872131 /dev/disk/by-id/wwn-0x50014ee203dca984 /dev/disk/by-path/pci-0000:09:00.0-sas-0x4433221103000000-lun-0 DEVNAME=/dev/sda DEVPATH=/devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:0/end_device-0:0/target0:0:0/0:0:0:0/block/sda DEVTYPE=disk ID_ATA=1 ID_ATA_DOWNLOAD_MICROCODE=1 ID_ATA_FEATURE_SET_AAM=1 ID_ATA_FEATURE_SET_AAM_CURRENT_VALUE=254 ID_ATA_FEATURE_SET_AAM_ENABLED=0 ID_ATA_FEATURE_SET_AAM_VENDOR_RECOMMENDED_VALUE=128 ID_ATA_FEATURE_SET_HPA=1 ID_ATA_FEATURE_SET_HPA_ENABLED=1 ID_ATA_FEATURE_SET_PM=1 ID_ATA_FEATURE_SET_PM_ENABLED=1 ID_ATA_FEATURE_SET_PUIS=1 ID_ATA_FEATURE_SET_PUIS_ENABLED=0 ID_ATA_FEATURE_SET_SECURITY=1 ID_ATA_FEATURE_SET_SECURITY_ENABLED=0 ID_ATA_FEATURE_SET_SECURITY_ENHANCED_ERASE_UNIT_MIN=408 ID_ATA_FEATURE_SET_SECURITY_ERASE_UNIT_MIN=408 ID_ATA_FEATURE_SET_SMART=1 ID_ATA_FEATURE_SET_SMART_ENABLED=1 ID_ATA_SATA=1 ID_ATA_SATA_SIGNAL_RATE_GEN1=1 ID_ATA_SATA_SIGNAL_RATE_GEN2=1 ID_ATA_WRITE_CACHE=1 ID_ATA_WRITE_CACHE_ENABLED=1 ID_BUS=ata ID_FS_LABEL=alina.o81.5:media3 ID_FS_LABEL_ENC=alina.o81.5:media3 ID_FS_TYPE=linux_raid_member ID_FS_USAGE=raid ID_FS_UUID=058bd7b0-455c-0d7e-6de0-a845ea05ee38 ID_FS_UUID_ENC=058bd7b0-455c-0d7e-6de0-a845ea05ee38 ID_FS_UUID_SUB=da1c1cad-6661-174c-b0b9-4bc1a712902d ID_FS_UUID_SUB_ENC=da1c1cad-6661-174c-b0b9-4bc1a712902d ID_FS_VERSION=1.2 ID_MODEL=WDC_WD20EARS-00S8B1 ID_MODEL_ENC=WDC\x20WD20EARS-00S8B1\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20 ID_PATH=pci-0000:09:00.0-sas-0x4433221103000000-lun-0 ID_PATH_TAG=pci-0000_09_00_0-sas-0x4433221103000000-lun-0 ID_REVISION=80.00A80 ID_SERIAL=WDC_WD20EARS-00S8B1_WD-WCAVY1872131 ID_SERIAL_SHORT=WD-WCAVY1872131 ID_TYPE=disk ID_WWN=0x50014ee203dca984 ID_WWN_WITH_EXTENSION=0x50014ee203dca984 MAJOR=8 MINOR=0 SEQNUM=3239 SUBSYSTEM=block USEC_INITIALIZED=2003 UDEV [558139.293742] change /devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:1/end_device-0:1/target0:0:1/0:0:1:0/block/sdb (block) ACTION=change DEVLINKS=/dev/disk/by-id/ata-WDC_WD20EARS-00S8B1_WD-WCAVY1879365 /dev/disk/by-id/wwn-0x50014ee25931e63a /dev/disk/by-path/pci-0000:09:00.0-sas-0x4433221102000000-lun-0 DEVNAME=/dev/sdb DEVPATH=/devices/pci0000:00/0000:00:06.0/0000:09:00.0/host0/port-0:1/end_device-0:1/target0:0:1/0:0:1:0/block/sdb DEVTYPE=disk ID_ATA=1 ID_ATA_DOWNLOAD_MICROCODE=1 ID_ATA_FEATURE_SET_AAM=1 ID_ATA_FEATURE_SET_AAM_CURRENT_VALUE=254 ID_ATA_FEATURE_SET_AAM_ENABLED=0 ID_ATA_FEATURE_SET_AAM_VENDOR_RECOMMENDED_VALUE=128 ID_ATA_FEATURE_SET_HPA=1 ID_ATA_FEATURE_SET_HPA_ENABLED=1 ID_ATA_FEATURE_SET_PM=1 ID_ATA_FEATURE_SET_PM_ENABLED=1 ID_ATA_FEATURE_SET_PUIS=1 ID_ATA_FEATURE_SET_PUIS_ENABLED=0 ID_ATA_FEATURE_SET_SECURITY=1 ID_ATA_FEATURE_SET_SECURITY_ENABLED=0 ID_ATA_FEATURE_SET_SECURITY_ENHANCED_ERASE_UNIT_MIN=408 ID_ATA_FEATURE_SET_SECURITY_ERASE_UNIT_MIN=408 ID_ATA_FEATURE_SET_SMART=1 ID_ATA_FEATURE_SET_SMART_ENABLED=1 ID_ATA_SATA=1 ID_ATA_SATA_SIGNAL_RATE_GEN1=1 ID_ATA_SATA_SIGNAL_RATE_GEN2=1 ID_ATA_WRITE_CACHE=1 ID_ATA_WRITE_CACHE_ENABLED=1 ID_BUS=ata ID_FS_LABEL=alina.o81.5:media3 ID_FS_LABEL_ENC=alina.o81.5:media3 ID_FS_TYPE=linux_raid_member ID_FS_USAGE=raid ID_FS_UUID=058bd7b0-455c-0d7e-6de0-a845ea05ee38 ID_FS_UUID_ENC=058bd7b0-455c-0d7e-6de0-a845ea05ee38 ID_FS_UUID_SUB=ade4cbb9-501c-cd2c-00b2-607f1699133b ID_FS_UUID_SUB_ENC=ade4cbb9-501c-cd2c-00b2-607f1699133b ID_FS_VERSION=1.2 ID_MODEL=WDC_WD20EARS-00S8B1 ID_MODEL_ENC=WDC\x20WD20EARS-00S8B1\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20 ID_PATH=pci-0000:09:00.0-sas-0x4433221102000000-lun-0 ID_PATH_TAG=pci-0000_09_00_0-sas-0x4433221102000000-lun-0 ID_REVISION=80.00A80 ID_SERIAL=WDC_WD20EARS-00S8B1_WD-WCAVY1879365 ID_SERIAL_SHORT=WD-WCAVY1879365 ID_TYPE=disk ID_WWN=0x50014ee25931e63a ID_WWN_WITH_EXTENSION=0x50014ee25931e63a MAJOR=8 MINOR=16 SEQNUM=3240 SUBSYSTEM=block USEC_INITIALIZED=2361-- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
