On Sun, May 14, 2023 at 10:14:46PM -0700, Christoph Hellwig wrote: > On Sun, May 14, 2023 at 08:20:04PM +0100, Lorenzo Stoakes wrote: > > As discussed at LSF/MM, on the flight over I wrote a little repro [0] which > > reliably triggers the ext4 warning by recreating the scenario described > > above, using a small userland program and kernel module. > > > > This code is not perfect (plane code :) but does seem to do the job > > adequately, also obviously this should only be run in a VM environment > > where data loss is acceptable (in my case a small qemu instance). > > It would be really awesome if you could wire it up with and submit it > to xfstests. Sure am happy to take a look at that! Also happy if David finds it useful in any way for this unit tests. The kernel module interface is a bit sketchy (it takes a user address which it blindly pins for you) so it's not something that should be run in any unsafe environment but as long as we are ok with that :)
