On Fri, Jul 05, 2019 at 09:25:48AM -0700, James Bottomley wrote: > Now the problem: I'd like to do some testing with high depth extent > trees to make sure I got this right, but the files we load at boot are > ~20MB in size and I'm having a hard time fragmenting the filesystem > enough to produce a reasonable extent (I've basically only got to a two > level tree with two entries at the top). Is there an easy way of > producing a high depth extent tree for a 20MB file? Create a series of 4kB files numbered sequentially, each 4kB in size until you fill the partition. Delete the even numbered ones. Create a 20MB file.
