On Thu, Sep 12, 2013 at 10:52:38AM -0500, Eric Sandeen wrote: > > However, it seems a little odd to me that ext4 feels it necessary to issue > discards on blocks which have been fallocated but not written to, I'll have > to think about that part (doesn't really matter for your case, it's just a > curiosity). For fstrim, we issue discards based on blocks which are not in use according to the block allocation bitmap. It shouldn't matter that we've issued discard on blocks which had been previously discarded, and in fact, it might help, since sometimes storage devices only traces block usage on large granularities --- that is, it might only releases blocks on a thin provisioned storage when a full megabyte worth of blocks are discarded. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
