On 5/27/2010 2:45 PM, Jan Kryl wrote: > Hi Frank, > > On 24/05/10 16:52 -0400, Frank Middleton wrote: > >> Many many moons ago, I submitted a CR into bugs about a >> highly reproducible panic that occurs if you try to re-share >> a lofi mounted image. That CR has AFAIK long since >> disappeared - I even forget what it was called. >> >> This server is used for doing network installs. Let's say >> you have a 64 bit iso lofi-mounted and shared. You do the >> install, and then wish to switch to a 32 bit iso. You unshare, >> umount, delete the loopback, and then lofiadm the new iso, >> mount it and then share it. Panic, every time. >> >> Is this such a rare use-case that no one is interested? I have >> the backtrace and cores if anyone wants them, although >> such were submitted with the original CR. This is pretty >> frustrating since you start to run out of ideas for mountpoint >> names after a while unless you forget and get the panic. >> >> FWIW (even on a freshly booted system after a panic) >> # lofiadm zyzzy.iso /dev/lofi/1 >> # mount -F hsfs /dev/lofi/1 /mnt >> mount: /dev/lofi/1 is already mounted or /mnt is busy >> # mount -O -F hsfs /dev/lofi/1 /mnt >> # share /mnt >> # >> >> If you unshare /mnt and then do this again, it will panic. >> This has been a bug since before Open Solaris came out. >> >> It doesn't happen if the iso is originally on UFS, but >> UFS really isn't an option any more. FWIW the dataset >> containing the isos has the sharenfs attribute set, >> although it doesn;t have to be actually mounted by >> any remote NFS for this panic to occur. >> >> Suggestions for a workaround most welcome! >> >> > the bug (6798273) has been closed as incomplete with following > note: > > "I cannot reproduce any issue with the given testcase on b137." > > So you should test this with b137 or newer build. There have > been some extensive changes going to treeclimb_* functions, > so the bug is probably fixed or will be in near future. > > Let us know if you can still reproduce the panic on > recent build. > > I don't know if the code path is the same enough, bu you should also try it like this:
# mount -F hsfs zyzzy.iso /mnt For many builds now, (Open)Solaris hasn't needed the 'lofiadm' step for ISO's (and possibly other FS's that can be guessed) I now put ISO's (for installs just like you) directly in my /etc/vfstab. -Kyle > thanks > -jan > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
