On Tue, May 16, 2017 at 04:37:42PM +0900, Daeho Jeong wrote: > Now, when we mount ext4 filesystem with '-o discard' option, we have to > issue all the discard commands for the blocks to be deallocated and > wait for the completion of the commands on the commit complete phase. No, you don't. You can execute them asynchronously, similar to what XFS already does.
