On 12/15/2010 08:47 AM, Or Gerlitz wrote:
Hi Mike,
With kernel 2.6.37-rc5 (the latest upstream release) I see some udev related
issue, when doing login (I'm using iscsi-initiator-utils-6.2.0.871-0.16.el5),
the following appears in the system logs
udevd-event[12383]: wait_for_sysfs: waiting for
'/sys/devices/platform/host18/ioerr_cnt' failed
udevd-event[12409]: wait_for_sysfs: waiting for
'/sys/devices/platform/host18/session16/target18:0:0/ioerr_cnt' failed
practically what happens is that it takes some "extra" time for the luns to
appear after the login, but
I wasn't sure if/what is the problem, maybe my udev (udev-095-14.21.el5_5.1) is
too old for this kernel?
when doing "iscsidadm -m session -P 3" the luns are printed "empty", e.g see
the below, note that
since the target is tgt we don't expect any disk for lun zero, but lun one has
a disk associated with it as you can see from the sg_map output
Attached SCSI devices:
Host Number: 18 State: running
scsi18 Channel 00 Id 0 Lun: 0
scsi18 Channel 00 Id 0 Lun: 1
# sg_map -i -x
[...]
/dev/sg4 18 0 0 0 12 Voltaire vsa 1
/dev/sg5 18 0 0 1 0 /dev/sdd Fio FS3-202-161-ES 1.0
Dec 15 16:28:58 cto-1 kernel: scsi18 : iSCSI Initiator over TCP/IP
Dec 15 16:28:58 cto-1 kernel: scsi 18:0:0:0: RAID Voltaire vsa
1 PQ: 0 ANSI: 5
Dec 15 16:28:58 cto-1 kernel: scsi 18:0:0:0: Attached scsi generic sg4 type 12
Dec 15 16:28:58 cto-1 kernel: scsi 18:0:0:1: Direct-Access Fio
FS3-202-161-ES 1.0 PQ: 0 ANSI: 5
Dec 15 16:28:58 cto-1 kernel: sd 18:0:0:1: Attached scsi generic sg5 type 0
Dec 15 16:28:58 cto-1 kernel: sd 18:0:0:1: [sdd] 155175680 512-byte logical
blocks: (79.4 GB/73.9 GiB)
Dec 15 16:28:58 cto-1 kernel: sd 18:0:0:1: [sdd] Write Protect is off
Dec 15 16:28:58 cto-1 kernel: sd 18:0:0:1: [sdd] Write cache: enabled, read
cache: enabled, doesn't support DPO or FUA
Dec 15 16:28:58 cto-1 kernel: sdd: unknown partition table
Dec 15 16:28:58 cto-1 kernel: sd 18:0:0:1: [sdd] Attached SCSI disk
Dec 15 16:28:59 cto-1 iscsid: connection16:0 is operational now
Dec 15 16:29:02 cto-1 udevd-event[12383]: wait_for_sysfs: waiting for
'/sys/devices/platform/host18/ioerr_cnt' failed
Dec 15 16:29:06 cto-1 udevd-event[12409]: wait_for_sysfs: waiting for
'/sys/devices/platform/host18/session16/target18:0:0/ioerr_cnt' failed
# iscsiadm -m session -P 3
The iscsiadm -m session output does not rely on udev or anything that
udev creates like the /dev nodes. iscsiadm just reads sysfs. The missing
output could be due to a change in the sysfs layout again. Could you
send me your kernel .config?
The other udev messages could also be caused by a older udev and a sysfs
change.
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