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@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)