On Wed, Jan 6, 2021 at 6:22 PM Will Deacon <will@xxxxxxxxxx> wrote: > On Wed, Jan 06, 2021 at 01:52:53PM +0000, Russell King - ARM Linux admin wrote: > > and the resulting Image is here: > > https://mirrors.edge.kernel.org/pub/linux/kernel/people/will/bugs/rmk/Image-5.9.0 > > 3. Using that kernel, I boot into a 64-bit Debian 10 filesystem and open a > couple of terminals over SSH. > > 4. In one terminal, I run: > > $ while (true); do find /var /usr /bin /sbin -type f -print0 | xargs -0 > md5sum > /dev/null; echo 2 | sudo tee /proc/sys/vm/drop_caches; done > > (note that sudo will prompt you for a password on the first iteration) > > 5. In the other terminal, I run: > > $ while (true); do ./hackbench ; sleep 1; done > > where hackbench is built from: > > https://people.redhat.com/mingo/cfs-scheduler/tools/hackbench.c > > and compiled according to comment in the source code. I tried the Image-5.9.0 on a virtual machine with seven CPUs (two clusters) running in an M1 mac mini and ran these commands inside. > With that, I see the following after ten seconds or so: > > EXT4-fs error (device sda2): ext4_lookup:1707: inode #674497: comm md5sum: iget: checksum invalid > > Russell, Mark -- does this recipe explode reliably for you too? Negative unfortunately -- no checksum mismatch so far, with 10 minutes elapsed. I'll keep it running a bit longer. arnd
