[systemd-devel] [uml-devel] Timed out waiting for device dev-disk-by...

[Thomas Meyer]

Am 03.10.2014 um 17:51 schrieb Andrei Borzenkov <arvidjaar at gmail.com>:
> 
> В Fri, 03 Oct 2014 13:32:09 +0200
> Thomas Meyer <thomas at m3y3r.de> пишет:
> 
>> Zitat von Lennart Poettering <lennart at poettering.net>:
>> 
>>>> On Tue, 30.09.14 21:44, Tomasz Torcz (tomek at pipebreaker.pl) wrote:
>>>> 
>>>>  Check the udev database at this moment.  In my understanding, to  
>>>> have device deemed
>>>> ready by systemd, two things must happen for device entry:
>>>> – TAGS variable must contain ”systemd”
>>>> – SYSTEMD_READY must be ”1”
>>> 
>>> Well, the latter is not entirely correct. It's reversed: the
>>> SYSTEMD_READY field must not be "0". Or in other words, either be "1"
>>> or absent, for systemd to consider the device around.
>>> 
>>> I'd really like to the the udev info output for the actual device
>>> missing here, rather than an unrelated one.
>> 
>> Hi,
>> 
>> I think the confusion with the device id comes from that fact that I  
>> posted the results from two different boots:
>> 
>> 1.) Trying to boot from the Fedora 21-Alpha with the contained initrd  
>> image -> waits forever for /dev/ubdb1 resp. /dev/ubdb3, which are the  
>> partitions on the ISO image
>> 2.) Boot from a Fedora 21 alpha installation, which waits forever for  
>> device with UUID 008af19d-2562-49bd-8907-721ea08f3e14, which is  
>> /dev/ubda1, which contains the /boot partition
>> 
>> the error happens in both situations, so I thought I shouldn't matter  
>> which one to post.
>> 
>> anyway, here is the info you asked for:
>> # systemctl status   
>> dev-disk-by\x2duuid-008af19d\x2d2562\x2d49bd\x2d8907\x2d721ea08f3e14.device
>> ● dev-disk-byx2duuid-008af19dx2d2562x2d49bdx2d8907x2d721ea08f3e14.device
>>    Loaded: loaded
>>    Active: inactive (dead)
>> 
>> # ls -ld /dev/disk/by-uuid/008af19d-2562-49bd-8907-721ea08f3e14
>> lrwxrwxrwx 1 root root 11 Oct  3 13:15  
>> /dev/disk/by-uuid/008af19d-2562-49bd-8907-721ea08f3e14 -> ../../ubda1
>> 
>> # udevadm info -q path -n /dev/ubda1
>> /devices/platform/uml-blkdev.0/block/ubda/ubda1
>> 
>> # udevadm info -q all -p /devices/platform/uml-blkdev.0/block/ubda/ubda1
>> P: /devices/platform/uml-blkdev.0/block/ubda/ubda1
>> N: ubda1
>> S: disk/by-path/platform-uml-blkdev.0-part1
>> S: disk/by-uuid/008af19d-2562-49bd-8907-721ea08f3e14
>> E: DEVLINKS=/dev/disk/by-path/platform-uml-blkdev.0-part1  
>> /dev/disk/by-uuid/008af19d-2562-49bd-8907-721ea08f3e14
>> E: DEVNAME=/dev/ubda1
>> E: DEVPATH=/devices/platform/uml-blkdev.0/block/ubda/ubda1
>> E: DEVTYPE=partition
>> E: ID_FS_TYPE=ext4
>> E: ID_FS_USAGE=filesystem
>> E: ID_FS_UUID=008af19d-2562-49bd-8907-721ea08f3e14
>> E: ID_FS_UUID_ENC=008af19d-2562-49bd-8907-721ea08f3e14
>> E: ID_FS_VERSION=1.0
>> E: ID_PART_ENTRY_DISK=98:0
>> E: ID_PART_ENTRY_FLAGS=0x80
>> E: ID_PART_ENTRY_NUMBER=1
>> E: ID_PART_ENTRY_OFFSET=2048
>> E: ID_PART_ENTRY_SCHEME=dos
>> E: ID_PART_ENTRY_SIZE=1024000
>> E: ID_PART_ENTRY_TYPE=0x83
>> E: ID_PART_ENTRY_UUID=73764b38-01
>> E: ID_PART_TABLE_TYPE=dos
>> E: ID_PART_TABLE_UUID=73764b38
>> E: ID_PATH=platform-uml-blkdev.0
>> E: ID_PATH_TAG=platform-uml-blkdev_0
>> E: MAJOR=98
>> E: MINOR=1
>> E: SUBSYSTEM=block
>> E: TAGS=:systemd:
>> E: USEC_INITIALIZED=50322
> 
> Hmm ... one of common reason for such problems recently was missing
> CONFIG_FHANDLE in kernel configuration. Could you verify that all
> required kernel options are set in your case?


Hi Andrei,

Thanks for this tip! My kernel config did indeed miss the CONFIG_FHANDLE option. After recompiling the kernel, the devices where automatically detected by systemd!

Does systemd log a message somewhere about this missing kernel option? Did I miss the relevant notice in the log messages?

Anyway thanks for you help.
> 
>> # cat /etc/fstab
>> 
>> #
>> # /etc/fstab
>> # Created by anaconda on Sun Sep 28 14:27:03 2014
>> #
>> # Accessible filesystems, by reference, are maintained under '/dev/disk'
>> # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
>> #
>> UUID=e2bffa45-d84f-47bc-81ba-e7a395751fa6 /                       ext4  
>>    defaults        1 1
>> UUID=008af19d-2562-49bd-8907-721ea08f3e14 /boot                   ext4  
>>    defaults        1 2
>> UUID=f452f020-a446-41ed-93c0-ee5ce56d6ea4 swap                    swap  
>>    defaults        0 0
>> 
>>> 
>>> Lennart
>>> 
>>> --
>>> Lennart Poettering, Red Hat
>>> _______________________________________________
>>> systemd-devel mailing list
>>> systemd-devel at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/systemd-devel
>> 
>> 
>> 
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>