Am 31.08.2012 02:19, schrieb Frederick Grose:
> On Wed, Aug 29, 2012 at 9:15 PM, Frederick Grose <fgrose@xxxxxxxxx> wrote:
>> commit d0d4f29cdd0a0e6dd1170965decb282ef5511746
>> Author: Frederick Grose <fgrose@xxxxxxxxxxxxx>
>> Date: Wed Aug 29 21:02:07 2012 -0400
>>
>> Don't truncate the overlay file on a reset.
>>
>> diff --git a/modules.d/90dmsquash-live/dmsquash-live-root.sh
>> b/modules.d/90dmsquash-live/dmsquash-live-root.sh
>> index f8bfca6..62340a5 100755
>> --- a/modules.d/90dmsquash-live/dmsquash-live-root.sh
>> +++ b/modules.d/90dmsquash-live/dmsquash-live-root.sh
>> @@ -98,7 +98,7 @@ do_live_overlay() {
>> if [ -f /run/initramfs/overlayfs$pathspec -a -w
>> /run/initramfs/overlayfs$pathspec ]; then
>> losetup $OVERLAY_LOOPDEV /run/initramfs/overlayfs$pathspec
>> if [ -n "$reset_overlay" ]; then
>> - dd if=/dev/zero of=$OVERLAY_LOOPDEV bs=64k count=1 2>/dev/null
>> + dd if=/dev/zero of=$OVERLAY_LOOPDEV bs=64k count=1
>> conv=notrunc 2>/dev/null
>> fi
>> setup="yes"
>> fi
>
> Void the above patch.
>
> I don't know why the overlay is NOT truncated without the notrunc
> conversion argument to dd.
>
> However, my testing shows that this bug is fixed by using the fsync
> conversion argument,
> https://bugzilla.redhat.com/show_bug.cgi?id=832884
>
> A revised patch file is attached to the bug ticket.
>
> --Fred
bugzilla attachment applied, thanks!
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