On Fri, Sep 11, 2020 at 05:56:42PM +0300, Dmitriy Gorokh wrote: > Hi Christoph, > > Unfortunately this fix (Upstream commit > 08fc1ab6d748ab1a690fd483f41e2938984ce353) breaks compatibility with > some userspace tools, specifically mdadm, who expect ENXIO errno as a > result of BLKPG_DEL_PARTITION operation to test if the block device is > a whole-disk or a partition. With the recent 5.8 kernel it now returns > ENOMEM on an existing block device which seems inconsistent. https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.9&id=88ce2a530cc9865a894454b2e40eba5957a60e1a
