On Fri, Jan 21, 2022 at 08:34:22AM +1300, Thomas Munro wrote: > On Mon, Jan 17, 2022 at 10:02 AM Noah Misch <n...@leadboat.com> wrote: > > - Report a Debian bug for the sparc64+ext4 zeros problem. > > I suspect that 027_stream_regress.pl hits this kernel bug with high > probability[1]. I wonder if the owner of kittiwake and tadarida would > consider setting up an xfs file system? Or alternatively, since ext4 > didn't support concurrent writes until recently, I wonder if there is > an option somewhere to turn the new concurrency stuff off, or failing > that, if we could temporarily downgrade the kernel to an older version > that does inode-level read/write locking.
If the write-only-new-bytes approach works, I think we'd want to revert those changes. Perhaps a cheaper stopgap is to make the affected tests skip on sparc Linux. Is that worth doing? (Could even limit the skip to ext4, e.g. by testing "df -x ext4 . >/dev/null".) > [1] > https://www.postgresql.org/message-id/CA%2BhUKG%2BeuZ%3Ddc27ZB%3Ds74x0q%3DzU%3D2%3Dvs8%2B6TkJoTUiCPUd2dQA%40mail.gmail.com
