* [Buildroot] [Bug 7442] New: rootfs remount does not work as expected with sysvinit
@ 2014-09-15 5:15 bugzilla at busybox.net
2014-09-15 5:22 ` [Buildroot] [Bug 7442] " bugzilla at busybox.net
2014-10-24 23:30 ` bugzilla at busybox.net
0 siblings, 2 replies; 3+ messages in thread
From: bugzilla at busybox.net @ 2014-09-15 5:15 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=7442
Summary: rootfs remount does not work as expected with sysvinit
Product: buildroot
Version: 2014.08
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
AssignedTo: unassigned at buildroot.uclibc.org
ReportedBy: joymarquis at hotmail.com
CC: buildroot at uclibc.org
Estimated Hours: 0.0
Problem
=======
The rootfs can not do remount correctly, with the default sysvinit string:
* rwmo::sysinit:/bin/mount -o remount,rw / # REMOUNT_ROOTFS_RW
Possible root cause
===================
The rootfs can do remount as expected, by removing the comment string and
changing the string to:
* rwmo::sysinit:/bin/mount -o remount,rw /
Program information
===================
FYI: The manual execution for commands below are working as expected:
* /bin/mount -o remount,rw / # REMOUNT_ROOTFS_RW
* /bin/mount -o remount,rw
mount version (mount -V):
* mount from util-linux 2.24.2 (libmount 2.24.0: debug, assert)
init version (strings /sbin/init | tail):
* @(#) init 2.88 26-Mar-2010 miquels at cistron.nl
Debug method
============
The problem is debugged and observed by adding follow lines into /etc/inittab
tst1::sysinit:/bin/mount > /dev/tst1
rwmo::sysinit:/bin/mount -o remount,rw / # REMOUNT_ROOTFS_RW
tst2::sysinit:/bin/mount > /dev/tst2
rwmt::sysinit:/bin/mount -o remount,rw /
tst3::sysinit:/bin/mount > /dev/tst3
Debug log
=========
After login, the three files proved the problem:
==> /dev/tst1 <==
none on /dev type devtmpfs (rw,relatime,size=516720k,nr_inodes=23632,mode=755)
/dev/sda1 on / type ext3
(ro,relatime,errors=continue,user_xattr,barrier=0,data=ordered)
proc on /proc type proc (rw,relatime)
==> /dev/tst2 <==
none on /dev type devtmpfs (rw,relatime,size=516720k,nr_inodes=23632,mode=755)
/dev/sda1 on / type ext3
(ro,relatime,errors=continue,user_xattr,barrier=0,data=ordered)
proc on /proc type proc (rw,relatime)
==> /dev/tst3 <==
none on /dev type devtmpfs (rw,relatime,size=516720k,nr_inodes=23632,mode=755)
/dev/sda1 on / type ext3
(rw,relatime,errors=continue,user_xattr,barrier=0,data=ordered)
proc on /proc type proc (rw,relatime)
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2014-09-15 5:15 [Buildroot] [Bug 7442] New: rootfs remount does not work as expected with sysvinit bugzilla at busybox.net
2014-09-15 5:22 ` [Buildroot] [Bug 7442] " bugzilla at busybox.net
2014-10-24 23:30 ` bugzilla at busybox.net
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