From: Christoph Hellwig <hch@lst.de>
Date: Tue, 23 May 2017 17:51:33 +0000 (+0200)
Subject: reservation text updates
X-Git-Tag: draft-hellwig-nfsv4-scsi-layout-nvme-01
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d12dd768a09a49bc0051c9e1f342259dd6dbb51a;p=users%2Fhch%2Fscsi-layout-nvme.git

reservation text updates
---

diff --git a/scsi_nvme_middle.xml b/scsi_nvme_middle.xml
index 36f589f..0e960b0 100644
--- a/scsi_nvme_middle.xml
+++ b/scsi_nvme_middle.xml
@@ -98,6 +98,12 @@
       PERSISTENT RESERVE OUT SCSI command to NVMe commands which
       SHOULD be used when using NVMe devices as storage devices
       for the pNFS SCSI layout.
+
+      One important difference between SCSI and NVMe Persistent Reservations
+      is that NVMe reservation keys always apply to all controllers used by
+      a host (as indicated by the NVMe HOSTID).  This behavior is somewhat
+      similar to setting the ALL_TG_PT bit when registering a SCSI
+      Reservation key, but actually guaranteed to work reliably.
     </t>
   </section>