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To: gentoo-dev@g.o
From: Maxim Kammerer <mk@...>
Subject: Re: Stability of /sys api
Date: Tue, 15 May 2012 23:21:44 +0300
On Tue, May 15, 2012 at 9:21 PM, Greg KH <gregkh@g.o> wrote:
> I know of no such problem with udisks, have you reported them to the
> upstream developers?

As I said, it's just what I hear — perhaps it's the usual retrograde
whining. I should probably just try udisks-glue, the only issue I see
is that it depends on UDisks 1.

> You can stall the whole hotplug path, causing issues and overruns.

Note that the script I mentioned immediately forks, and only updates
autofs mapping entries — it doesn't actually mount anything.

> Right there, if that's all you need, and it's what most embedded systems
> need, udev isn't even needed, just use devtmpfs and all is fine.

Perhaps I wasn't expressing myself clearly — the point was to show
that mdev is not needed. I used mdev in initramfs previously, but now
rely on devtmpfs and the one-liner /sbin/hotplug for loading modules.
Incidentally, turning off mdev resulted in Busybox executable size
change of precisely 0, which I guess shows how much mdev actually
does.

> I really want to get rid of that entry and option from the kernel entirely

Please don't — it's useful in Busybox-based initramfs. Dracut-like
inclusion of udev and its dependencies DAG is usually unnecessary and
an overkill.

-- 
Maxim Kammerer
Liberté Linux (discussion / support: http://dee.su/liberte-contribute)


References:
Stability of /sys api
-- Walter Dnes
Re: Stability of /sys api
-- Greg KH
Re: Stability of /sys api
-- Maxim Kammerer
Re: Stability of /sys api
-- Greg KH
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Updated Jun 29, 2012

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