On Thu, Apr 16, 2015 at 4:13 PM, Moez Roy <moez.roy(a)gmail.com> wrote:
Copying more than 500 MB crashes Fedora Live CD even though there is
sufficient RAM.
It doesn't matter how much RAM your system has, once you copy more
than 500 MB you will get stuff like "Input/output error" or just plain
crashes like "Segmentation fault".
Why does this happen?
I think I figured out why this happens.
The file /usr/lib/dracut/modules.d/90dmsquash-live/dmsquash-live-root.sh
seems to create a 500MB overlay:
dd if=/dev/null of=/overlay bs=1024 count=1 seek=$((512*1024))
2> /dev/null
if [ -n "$setup" -a -n "$readonly_overlay" ]; then
RO_OVERLAY_LOOPDEV=$( losetup -f )
losetup $RO_OVERLAY_LOOPDEV /overlay
else
losetup $OVERLAY_LOOPDEV /overlay
fi
fi
Wouldn't it be more efficient if this was tmpfs instead?
This also affects installing applications in the live environment
where the installed size is more than 500MB.