On Sun, Jun 24, 2012 at 10:23:24PM +0300, Michael Tokarev <m...@tls.msk.ru>
wrote:
> >seems the symlink mount has also been removed - I have since switched to
> >am-utils, which solves both problems, as autofs seems to be eternally
> >broken.
>
> Can you please show the options or maps you were using with autofs?
/etc/auto.master
/fs /etc/maps/fs nobind
/etc/maps/fs
doom_db -symlink :/db
That's a symlink mount - it simply creates a symlink (it can also be used
with an nfs mount and will symlink instead of bind for normal mounts,
thus my confusion with nobind, which I believed to do the same). It also
happens with a normal mount:
rain -vers=3,intr,tcp,rsize=1048576,wsize=1048576 rain:/
As long as it is local, apparently.
> Yes, apparently autofs (both user and kernel space) has quite some
> bugs, but maybe it's a good idea to fix at least some of them...
Right, but despite many people reporting them repeatedly, they have not
been fixed for half a decade, so I decided it's pointless to hope for
fixes - they are not coming to be, and upstream sometimes outright refuses
to fix bugs (race condition on recursive mounts, see e.g. 556910). That's
definitely not a debian problem, previous maintainers have reported bugs
(sometimes with patches) to upstream, it's just that upstream isn't
responsive, and bugs keep coming back.
(As far as I know, the -symlink mount option was added by a previous
debian maintainer because upstream refused to fix the underlying problem,
and smylinks work around it nicely).
The tragedy is that I so wanted to get away from amd, the menace of
the early 90ies, but to my surprise, amd is much more stable, and even
restarts cleanly, something I could never pull off with automount, wow,
why didn't I switch back earlier :) I don't even need to touch every
single mount point manually anymore after starting automount to avoid
races!
As far as I can see, the only drawback of am-utils over automount is that
the former uses 5mb rss, and the latter 2mb. If not for that, there would
be absolutly no reason to keep automount.
So, from a purely technical perspective, the best way to fix autofs is
to get rid of it, as am-utils now supports sun-style automount maps and
the autofs filesystem. Ghosting doesn't work with amd and the autofs
filesystem, but that never worked reliably with automount either.
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