Hello again.... ... I just found time now to work on these issues again .. and well current progress is at a level of 0%. This is because I dont know how to remount /real_root .. since I am run-init'ed to the unionfs /real_root does not exist within the unified filesystems but only from the outside .. so how am I supposed to remount it rw then?
regards, Patrick _ _Patrick wrote: > [EMAIL PROTECTED] wrote: > >> Patrick: >> >> >>>> - How did you mount your aufs? >>>> >>>> >>>> >>> by using 'mount -w -t aufs -o dirs=/new=rw:/real_root=ro none /union' in >>> the init script of an initramfs .. right after pre-mount and mounting >>> scripts of the rootfs have been run. >>> >>> >> Thank you. >> Then, you didn't use '-n', did you? >> And your /etc/mtab file still doesn't exist, right? >> How about CONFIG_AUFS_COMPAT? Did you define it? >> >> > > Nope, I didnt use -n. But /etc/mtab exists meanwhile and is working > fine. No redefining needed. > >> >> >>>> - How is /proc/mounts just before you remount or unionctl? Will you show >>>> us? >>>> >>>> >>>> >>> Sure: >>> >>> >> Ok. >> I recognize that you have mounted aufs with one tmpfs and one >> ext3. Additionally, you have several mounts under aufs. >> >> >> > True (while the other mounts are just debian-specific). > >> >> >>> confusing me since theres not much documentation about using a stackable >>> filesystem with an initramfs thus especially during boot process. >>> Thus I asked here to get more detailed information than I could retrieve >>> by using google for the past few days. >>> >>> >> There is a sample linuxrc script under aufs/sample directory. Doesn't it >> help you? >> >> >> > Not at all because a) initramfs is different to linuxrc ... pivot_root > wont work with an initramfs thus one has to use switch_root of busybox > or run-init of klibc .. All howtos/tutorials/whatever do not use an > initramfs but initrd, which I consider crappy because initrd is > deprecated meanwhile. > >> >> >>> Heh, then again I dont see any reason for shipping it within the aufs >>> sources. (or recommending it on SF's project page as a substution for >>> the equivalent tool of unionfs). >>> >>> >> It was just for compatibility with unionfs. >> CONFIG_AUFS_COMPAT is disabled by default, and will be deleted as it was >> announced. I don't mean to *recommend* it by these sentences which are >> left still. >> >> > > Ok, then I misunderstood the lines on the project page :) > >> ---------------------------------------------------------------------- >> And there is a simple shell >> script 'unionctl' which is compatible with unionctl(8) in >> Unionfs, except --query action. >> This script executes mount(8) with 'remount' option and uses >> add/del/mod aufs mount options. >> If you are familiar with Unionfs and want to use unionctl(8), you can >> try this script instead of using mount -o remount,... directly. >> Aufs does not support ioctl(2) interface. >> This script is highly depending upon mount(8) in >> util-linux-2.12p package, and you need to mount /proc to use this script. >> If your mount(8) version differs, you can try modifying this >> script. It is very easy. >> ---------------------------------------------------------------------- >> >> Finally, do you distinguish which systemcall took a long time, your 8 >> min? Is it all mount(2) with MS_REMOUNT? >> >> >> >> > Hmm I only tried unionctl .. didnt try mount yet .. tho I will soon... > (so if mount also takes that long, I may strace it and report in further > details). > >> Junjiro Okajima >> >> >> > > regards, > Patrick > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
