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Re: kern/55189: NVMe SSD reports unsafe shutdowns

The following reply was made to PR kern/55189; it has been noted by GNATS.

From: Andreas Gustafsson <>
Cc: (Andreas Gustafsson)
Subject: Re: kern/55189: NVMe SSD reports unsafe shutdowns
Date: Wed, 22 Apr 2020 18:17:14 +0300

 FWIW, the lack of detach messages for nvme0 and ld0 can also be
 reproduced in qemu without any physical NVMe hardware.  Just create
 a disk image:
   dd if=/dev/zero of=nvme.img bs=1k count=1024
 and add the following to the qemu-system-x86_64 command line:
   -drive file=nvme.img,if=none,id=a -device nvme,drive=a,serial=1234
 The console will show attach messages like these at boot time:
   [   1.0071408] nvme0 at pci0 dev 4 function 0: Intel product 5845 (rev. 0x02)
   [   1.0071408] nvme0: NVMe 1.2
   [   1.0071408] nvme0: for admin queue interrupting at msix0 vec 0
   [   1.0071408] nvme0: QEMU NVMe Ctrl, firmware 1.0, serial 1234
   [   1.0071408] nvme0: for io queue 1 interrupting at msix0 vec 1 affinity to cpu0
   [   1.0071408] ld0 at nvme0 nsid 1
   [   1.0071408] ld0: 1024 KB, 2 cyl, 16 head, 63 sec, 512 bytes/sect x 2048 sectors
 but no corresponding detach messages at shutdown time.
 Andreas Gustafsson,

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