On Mon, Mar 29, 2010 at 12:23:11PM -0400, Phillip Susi wrote: > On 3/29/2010 12:11 PM, Petr Uzel wrote: > > Imagine you add partitions with parted in a script. Then the ioctl()s > > are: > > > > #create 1st partition > > BLKPG_ADD_PART (sda1) [A] > > > > #create 2nd partition > > BLKPG_DEL_PART (sda1) [B] > > BLKPG_ADD_PART (sda1) > > BLKPG_ADD_PART (sda2) > > > > [A] triggers udev, which runs hal, which asynchronously opens > > /dev/sda1 > > [B] sda1 is still opened by hal -> EBUSY > > > > And there is a good chance that 0.5s after [B], the hal will release > > the device and BLKPG would succeed. > > This is not a problem since when you get EBUSY removing A, it is ignored > since A is unmodified. It does not matter whether A is busy because of > a transient open from hal, or because it has actually been mounted, > since we aren't trying to modify it, we don't care that it is busy.
You are right - I did not realize this, sorry. There is still the (subtle) issue with subsequent changes of the same partition, but honestly I can not imagine any real life use case that needs to do that - so I think we could eventually add the wait & retry later, if it turns out that it is needed. Thanks, Petr -- Petr Uzel, openSUSE Boosters Team IRC: ptr_uzl @ freenode _______________________________________________ parted-devel mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/parted-devel
