On Wed, Apr 12, 2023 at 2:56 PM Christoph Berg <m...@debian.org> wrote: > I'm hitting a panic in t_004_io_direct. The build is running on > overlayfs on tmpfs/ext4 (upper/lower) which is probably a weird > combination but has worked well for building everything over the last > decade. On Debian unstable: > > PANIC: could not open file "pg_wal/000000010000000000000001": Invalid > argument
Hi Christoph, That's an interesting one. I was half expecting to see that on some unusual systems, which is why I made the test check which OS it is and exclude those that are known to fail with EINVAL or ENOTSUPP on their common/typical file systems. But if it's going to be Linux, that's not going to work. I have a new idea: perhaps it is possible to try to open a file with O_DIRECT from perl, and if it fails like that, skip the test. Looking into that now.
