Hi! My initramfs mounts /proc itself, and can not unmount it as it is in use (dmcrypt mappings are set up). This leads to a harmless, but ugly situation where /proc is shown mounted twice. Under normal circumstances it is a good idea to mount /proc, as the mounted fs inside initramfs is not usable after switch_root'ing. I found a quite elegant solution, before running switch_root i do a mount -o move to move the mounted /proc to /newroot/proc. After this /proc is still usable in the new rootfs without needing to mount it. Also there is only one entry in /proc/mounts for it. I did a little /sbin/rc enhancement to allow skipping its attempt to mount /proc at boot time. Here it is: --- /sbin/rc.orig 2006-11-19 15:34:39.106207470 +0100 +++ /sbin/rc 2006-11-19 15:51:00.180061574 +0100 @@ -215,16 +215,20 @@ echo fi - check_statedir /proc + if [[ ${RC_SKIP_PROC} != "yes" ]] ; then + check_statedir /proc - ebegin "Mounting proc at /proc" - if [[ ${RC_USE_FSTAB} = "yes" ]] ; then - mntcmd=$(get_mount_fstab /proc) + ebegin "Mounting proc at /proc" + if [[ ${RC_USE_FSTAB} = "yes" ]] ; then + mntcmd=$(get_mount_fstab /proc) + else + unset mntcmd + fi + try mount -n ${mntcmd:--t proc proc /proc -o noexec,nosuid,nodev} + eend $? else - unset mntcmd + ewarn "Mounting of /proc skipped" fi - try mount -n ${mntcmd:--t proc proc /proc -o noexec,nosuid,nodev} - eend $? # Start profiling init now we have /proc profiling start --- /etc/conf.d/rc.orig 2006-11-19 15:19:42.277546150 +0100 +++ /etc/conf.d/rc 2006-11-19 15:48:18.592626598 +0100 @@ -98,6 +98,12 @@ RC_USE_FSTAB="no" +# RC_SKIP_PROC allows you to prevent rc from mounting /proc at boot time. +# This is especially useful if it has already been mounted by an initrd/ +# initramfs or similar. + +RC_SKIP_PROC="no" + # RC_USE_CONFIG_PROFILE allows you to have different /etc/conf.d files # based on your runlevel - if a conf.d file for your profile does not exist # then we try and use the default one. Maybe you could integrate it, as it is no big deal and saves (at least) me from accidentally overwriting my customized /sbin/rc. Greetings, Phil
baselayout-1.13.0_alpha doesn't mount /proc if it's already mounted, which should provide the functionality you require. re-open if you disagree. Thanks for the patch though :)
Hi! What's the status of the mentioned problem here? I'm using baselayout-1.12.11.1 and still having the problem of /proc forcibly being mounted at boot time. Do I have to update to baselayout-2? Greetings, Phil
For all who stumble upon this bug report: migrating to baselayout2 and openrc indeed eliminate this issue, as mounting of /proc is just an init service and therefore can be disabled. The migration guide can be found here: http://www.gentoo.org/doc/en/openrc-migration.xml BTW: the reason why my Gentoo installations mustn't mount /proc is this: http://nwl.cc/cgi-bin/git/gitweb.cgi?p=initramfs-init.git;a=summary Greetings, Phil
