Re: [PATCH RFC v2 1/2] block: scan partitions for hidden disks
Christoph Hellwig <[email protected]>
| Newsgroups | org.kernel.vger.linux-block,org.infradead.lists.linux-nvme |
|---|---|
| Message-ID | <[email protected]> |
On Tue, Aug 18, 2026 at 12:08:53PM +0000, John Garry wrote: > From: John Garry <[email protected]> > > If a disk is hidden (GENHD_FL_HIDDEN flags set), we currently do not scan > the disk partition table. > > GENHD_FL_HIDDEN is used in NVMe multipath support to hide the per-path > disk. It also is used for giving a handle to NVMe devices that we can't support as block devices and for which we only want a handle to issue passthrough commands. For those attempting a partition scan is rather suboptimal. As is in general doing an extra scan per controller when we know it must give the same results. Wouldn't it make more sense to just propagate the partition table from the ns_head to each individual path?