eudev vs udev - current user perspectives

Anon-E-moose

I am curious as to how those who use eudev feel about the current state of it.

I'm currently using udev-171-r6, pre the /usr merge and the device naming fiasco.

If you would when you give your experience, would you tell me what version of eudev that you are using.
And how it stacks up to whatever version of udev that you were using.

NOTE: this thread has nothing to do with systemd or udev in general, just how eudev (latest versions) stack up to udev.

TIA.

Edit to add: I know there's a howto, that's not what I'm asking.
And I didn't want to pollute the howto in the documentation forum.
I just want user experiences, especially if they're running the latest ~amd64.
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saellaven · l33t Joined: 23 Jul 2006 Posts: 646

I'm mostly stable (amd64), though a lot of the base system (I use the latest stable kernels directly from kernel.org, but use unstable gcc, glibc, binutils in addition to a few unstable apps).

I have absolutely no problems with eudev (1.3) here as is, though I'm still tempted to get away from it (and all of the related mess in the form of *kit and friends) and back to static devices when I have time. I use a separate /usr on lvm and I've had some issues with >sys-fs/lvm2-2.02.100 (likely due to being more and more tied into the systemd/udev mess), though I have had a chance to see if yuyuyak's fix fixes that for me (and I may abandon lvm entirely in the future should it become too coupled to systemd).

Anon-E-moose · Posted: Tue Mar 25, 2014 11:03 pm Post subject:

I'm torn between staying with udev/eudev or just moving to a static dev.

AFAIK, if you don't use *udev then you lose the ability to mount with LABELS,
and I'm thinking more of things like usb sticks instead of hard disks which
should stay the same unless reordered.

Any thoughts on that.
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saellaven · l33t Joined: 23 Jul 2006 Posts: 646

I used to mount my lvm volumes by LABEL, and then later switched to UUID, though I'm now back to /dev/mapper/* nodes and physical partitions (root and boot), due to the changes made in udev and openrc over the last few years. I just feel more sure that my system will come up this way. Maybe I'm being overly cautious, but once burned, twice shy. If memory serves, I was using LABEL mounting back before I had any sort of /dev automation (IIRC, LABEL mounting is built into the kernel, UUID mounting relies on a helper like udev).

As far as removable media goes, I've always used regular /dev nodes for that, though, admittedly, I don't run around with a dozen USB sticks in my pocket that I'm plugging in simultaneously (I have two optical drives, 2 USB sticks, a Compact Flash reader and a SD card reader). Yeah, I'm one of those people that still cling to burning and mounting optical discs from the command line, having become comfortable with it in the mid-late 90s and any data I might need on another computer is available via NFS locally or by ssh remotely.

If I had multiple people sitting at my keyboard on a regular basis, I might look into automating things more for them, but for me, I'm fine with doing it all the old way since it just works and there aren't a half dozen pieces of middle-ware waiting to deprecate and break things without warning.

Anon-E-moose · Posted: Tue Mar 25, 2014 11:27 pm Post subject:

Thanks for those insights.

666threesixes666 · Posted: Wed Mar 26, 2014 2:00 am Post subject:

give eudev a whirl.... im using it on my funtoo box, there was a bad kit commit & eudev fixed it. its pretty solid and not a moving target. static dev is much work for little reward.

Hypnos · Posted: Wed Mar 26, 2014 2:06 am Post subject:

Been using eudev since it hit the Portage tree, no problems. Seemless transition from the old udev.
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Naib · Posted: Wed Mar 26, 2014 8:24 am Post subject:

Perspective from a technical point of view? Both do the job they are 'designed' todo. Perspective of changing... For the most part it seems political. My server uses udev and is fine, my desktop uses eudev as I switched when sysd was forced onto me as gnome was on my system, a decision was made to scrub it completely to ensure it is possible - it is and was only complicated by gnome and all the cross dependencies on udev.

Going all the way back to static seems to be cutting your nose off to spite your face (except in embedded for instance), again as an exercise to ensure there is always an option its seems reasonable.

As long as eudev and udev are feature compatible ( for reasonable features) I see no problem. But with, IMHO, the enevitable gimping of udev on non-sysd systems... The question has to be asked what other projects will swallow sysd making it an ever increasing system dependency and thus the ever increasing prospect of eudev not being viable
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Anon-E-moose · Posted: Wed Mar 26, 2014 9:16 am Post subject:

Thanks for the replies.

I'm using an old udev, but I've had to mask 3-4 packages because they wanted a newer udev.
But if switching to eudev will mitigate that, then it looks like I'll switch.

I used a static dev for a long time, and since I understand how to set it up it's not that difficult.
Of course when I was running it before I didn't have things like usb sticks, etc.
So it would be a little bit of a learning curve for adding those things.
And it's part of the reason for me looking at eudev.
I don't do automounting so that's not a concern.
I'm more interested in simple device detection,
and I don't want to have to fight any *udev to make my network work.
It works just fine with eth* as it is.
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xaviermiller · Posted: Wed Mar 26, 2014 9:20 am Post subject:

eudev works well.

There is an other choice : using mdev from busybox. But not everything is ok there (I got problems with USB audio devices, hotplug/coldplug was quite buggy)
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Anon-E-moose · Posted: Wed Mar 26, 2014 9:23 am Post subject:

I looked at mdev, but heard rumors that there might be the problems that you've mentioned,
and that there might be problems in the future to keep it working.

Is anyone running the lastest ~eudev 1.5.3 and is it solid?
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xaviermiller · Posted: Wed Mar 26, 2014 9:56 am Post subject:

I use the latest ~eudev on ~x86, ~amd64 and ~arm without problems, the migration from udev was transparent (unless the silly network namings)
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Kind regards,
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Anon-E-moose · Posted: Wed Mar 26, 2014 10:04 am Post subject:

Thanks that's what I wanted to know.
I like my network names the way I have them now, eth?.

I assume that eudev will honor the 70-persistent-net.rules file.
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xaviermiller · Posted: Wed Mar 26, 2014 10:08 am Post subject:

eudev will NOT rename the network interfaces. This was the initial reason to fork from udev.
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Anon-E-moose · Posted: Wed Mar 26, 2014 12:24 pm Post subject:

Thanks for all the replies.

Just swapped over and it's working well.

Note: well, for me, is that it seems to work the same as the old udev.
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Naib · Posted: Wed Mar 26, 2014 12:29 pm Post subject:

John R. Graham · Posted: Wed Mar 26, 2014 2:49 pm Post subject:

As I reported in Portage is Getting Awfully Smart, the install of eudev was absolutely simple and painless. It's been working flawlessly for me ever since.

- John
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Anon-E-moose · Posted: Wed Mar 26, 2014 3:20 pm Post subject:

SamuliSuominen · Posted: Wed Mar 26, 2014 8:15 pm Post subject:

saellaven · l33t Joined: 23 Jul 2006 Posts: 646

SamuliSuominen · Posted: Wed Mar 26, 2014 8:48 pm Post subject:

Anon-E-moose · Posted: Wed Mar 26, 2014 8:53 pm Post subject:

Save the history of udev/eudev for some other time.

TIA
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PRIME x570-pro, 3700x, 6.1 zen kernel
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SamuliSuominen · Posted: Wed Mar 26, 2014 9:04 pm Post subject:

666threesixes666 · Posted: Thu Mar 27, 2014 12:29 am Post subject:

seamless transition and painless, thus my "give it a whirl" i mean im poettering fanboi here and i say its ok.... first time i tried eudev right when it came around i had major problems with it and it was painful. now its a cake walk....

platojones · Posted: Thu Mar 27, 2014 1:18 am Post subject:

eudev has been totally trouble-free for me thus far. I made the switch in December and have had zero udev related issues. I like that. That's all I have to say about it.