Bug 219038 – sys-apps/openrc doesn't filter out initramfs rootfs from mtab

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description cazzantonio 2008-04-23 15:34:33 UTC]

Openrc doesn't filter out the line "rootfs / rootfs rw 0 0" from mtab.
Previous 1.X baselayout didn't show that entry.
This is a redundant entry since the root fs is properly mounted from /dev/root.
I don't know if that is a bug, but adding a simple grep command to /etc/init.d/mtab would solve this quite easily.

Reproducible: Always

[Comment 1 SpanKY 2008-04-23 15:57:48 UTC]

it isnt a redundant entry ... it is actually a completely different filesystem that /dev/root gets mounted over

[Comment 2 Roy Marples 2008-04-23 16:11:03 UTC]

That entry needs to be there so that / can be overmounted with tmpfs and umounted without error. See bug #194615 for the gory details.

[Comment 3 cazzantonio 2008-04-23 16:32:56 UTC]

No existing distribution (known to me) shows that entry. It's only a minor cosmetic problem to me though... I'm currently filtering it since I don't use a tmpfs root

[Comment 4 SpanKY 2008-04-23 19:02:22 UTC]

maybe, but no other distro provides a flexible baselayout like Gentoo does.  you do use a tmpfs root and you dont even know it ... everyone does -- they dont have a choice with linux-2.6.  dont believe me; check your /proc/mounts.

Roy: no chance to detect whether the / is initramfs and optionally filtering it ?  i know what the entry means, and you know what it means, but really only people who play with initramfs knows this.  the large majority of people are just confused.

[Comment 5 Roy Marples 2008-04-23 19:41:22 UTC]

Not easily afaik. Also, I seem to recall either udev or hal wanting it too many moons ago. Adding Cardoe and zzam for their comments.

[Comment 6 SpanKY 2008-04-23 20:14:49 UTC]

Doug: in the meantime, can you add a note to the migration guide ?

[Comment 7 Doug Goldstein (RETIRED) 2008-10-07 15:38:48 UTC]

Need to update docs.

[Comment 8 SpanKY 2009-10-11 09:47:33 UTC]

with things moving towards /etc/mtab being a symlink to /proc/mounts, i wouldnt bother filtering the output to "protect" users.  just add a note to the guide and call it a day.

[Comment 9 nm (RETIRED) 2010-11-30 00:18:13 UTC]

(In reply to comment #8)
> with things moving towards /etc/mtab being a symlink to /proc/mounts, i wouldnt
> bother filtering the output to "protect" users.  just add a note to the guide
> and call it a day.
> 

What note, exactly, and where would you put it in the guide? I can't see anything specific that needs to be added, based on the comments.

[Comment 10 Robin Johnson 2011-01-17 07:57:16 UTC]

Documented in the openrc-migration guide now, that it's not a bug to be listed twice.

[Comment 11 SpanKY 2011-05-18 00:27:08 UTC]

*** Bug 367637 has been marked as a duplicate of this bug. ***