I didn't know such a thing existed... does it work on any block device? Where do I read more about this? On Fri, Feb 1, 2019 at 2:35 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Thu, Jan 31, 2019 at 02:41:52PM -0500, John Dorminy wrote: > > > On Wed, Jan 30, 2019 at 09:08:50AM -0500, John Dorminy wrote: > > > > (I use WRITE_SAME to fill devices with a particular pattern in order > > > > to catch failures to initialize disk structures appropriately, > > > > personally, but it's just for convenience/speed.) > > > > > > How do you use it? We don't have a user interface to generate > > > REQ_OP_WRITE_SAME requests. > > > > A not-checked-in test module, similar to Zhang Xiaoxu's reproducer, > > exposing a sysfs node to trigger filling a block device with a test > > pattern. > > Any reason you don't just use SCSI/NVMe passthrough directly from > userspace for that?
