Warren Togami wrote: > Jeremy Katz wrote: >> >> The quick steps of how to take advantage of the functionality: >> 1) Build a live image using the newer mkinitrd (6.0.32) in your repos >> 2) Use the updated livecd-iso-to-disk.sh with an --overlay-size-mb=512 >> (or 1024 or whatever based on the capacity of your USB stick minus the >> size of the ISO) > > if [ -n "$overlaysizemb" ]; then > echo "Initializing persistent overlay file" > OVERFILE="overlay-$( /lib/udev/vol_id -l $USBDEV )-$( > /lib/udev/vol_id -u $USBDEV )" > dd if=/dev/null of=$USBMNT/LiveOS/$OVERFILE \ > count=1 bs=1M seek=$overlaysizemb > > Warning! > > If your USB stick is vfat filesystem and $overlaysizemb is > some number larger than your RAM, your system will swap storm and die. > According to Ulrich Drepper this isn't dd using all RAM, but it is up to > the filesystem implementation. Since the OOM happens in kernel space it > cannot OOM kill anything and recover. > I tried creating a 512 MB overlay file when my vfat usbkey had only 300 MB left. The filesystem on the usbkey was no longer useable and I had to reformat the usbkey to use it again.
-- Patrice -- Fedora-livecd-list mailing list Fedora-livecd-list@redhat.com https://www.redhat.com/mailman/listinfo/fedora-livecd-list
