* How /dev/nvme numbers are allocated/mapped to BDF
@ 2018-08-02 22:09 Alex_Gagniuc
2018-08-03 7:18 ` Christoph Hellwig
0 siblings, 1 reply; 11+ messages in thread
From: Alex_Gagniuc @ 2018-08-02 22:09 UTC (permalink / raw)
Hi,
Recently some confusion came up about how the /dev/nvme numbers are
allocated, and how much one can expect the to be consistent across
reboots. I was fairly convinced that it was about as random as a coin
flip, but some people have pointed out that these numbers were very
deterministic in older kernels, dating back to the 3.10 era.
Were there some intentional changes along the way, or was this numbering
scheme _never_ supposed to be deterministic in the first place?
Also, separate but related question. Samsung M1725a drives don't
generate entries under /dev/disk/by-path. Any idea why that might be?
Alex
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-02 22:09 How /dev/nvme numbers are allocated/mapped to BDF Alex_Gagniuc
@ 2018-08-03 7:18 ` Christoph Hellwig
2018-08-03 14:40 ` Keith Busch
0 siblings, 1 reply; 11+ messages in thread
From: Christoph Hellwig @ 2018-08-03 7:18 UTC (permalink / raw)
On Thu, Aug 02, 2018@10:09:50PM +0000, Alex_Gagniuc@Dellteam.com wrote:
> Hi,
>
> Recently some confusion came up about how the /dev/nvme numbers are
> allocated, and how much one can expect the to be consistent across
> reboots. I was fairly convinced that it was about as random as a coin
> flip, but some people have pointed out that these numbers were very
> deterministic in older kernels, dating back to the 3.10 era.
They are allocated using an ida allocator and are not stable at all.
For any stable enumeration you have to rely on the EUI64/NGUID/UUID.
> Also, separate but related question. Samsung M1725a drives don't
> generate entries under /dev/disk/by-path. Any idea why that might be?
Please send a dump of the nvme-cli id-ctrl subcommand.
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 7:18 ` Christoph Hellwig
@ 2018-08-03 14:40 ` Keith Busch
2018-08-03 16:16 ` Alex_Gagniuc
0 siblings, 1 reply; 11+ messages in thread
From: Keith Busch @ 2018-08-03 14:40 UTC (permalink / raw)
On Fri, Aug 03, 2018@12:18:20AM -0700, Christoph Hellwig wrote:
> On Thu, Aug 02, 2018@10:09:50PM +0000, Alex_Gagniuc@Dellteam.com wrote:
> > Hi,
> >
> > Recently some confusion came up about how the /dev/nvme numbers are
> > allocated, and how much one can expect the to be consistent across
> > reboots. I was fairly convinced that it was about as random as a coin
> > flip, but some people have pointed out that these numbers were very
> > deterministic in older kernels, dating back to the 3.10 era.
>
> They are allocated using an ida allocator and are not stable at all.
> For any stable enumeration you have to rely on the EUI64/NGUID/UUID.
Yeah, the were always allocated through an ida and were never stable in
any kernel version.
> > Also, separate but related question. Samsung M1725a drives don't
> > generate entries under /dev/disk/by-path. Any idea why that might be?
>
> Please send a dump of the nvme-cli id-ctrl subcommand.
The 'by-path' should actually only depend on the PCI BDf and the 'nsid'
attribute. The bdf is not necessarilly stable.
If using systemd, you'd need thsi commit to get the by-path links:
https://github.com/systemd/systemd/commit/b4c6f71b827d41a4af8007b735edf21ef7609f99
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 14:40 ` Keith Busch
@ 2018-08-03 16:16 ` Alex_Gagniuc
2018-08-03 16:54 ` Keith Busch
0 siblings, 1 reply; 11+ messages in thread
From: Alex_Gagniuc @ 2018-08-03 16:16 UTC (permalink / raw)
On 08/03/2018 09:40 AM, Keith Busch wrote:
> On Fri, Aug 03, 2018@12:18:20AM -0700, Christoph Hellwig wrote:
>> On Thu, Aug 02, 2018@10:09:50PM +0000, Alex_Gagniuc@Dellteam.com wrote:
>>> Hi,
>>>
>>> Recently some confusion came up about how the /dev/nvme numbers are
>>> allocated, and how much one can expect the to be consistent across
>>> reboots. I was fairly convinced that it was about as random as a coin
>>> flip, but some people have pointed out that these numbers were very
>>> deterministic in older kernels, dating back to the 3.10 era.
>>
>> They are allocated using an ida allocator and are not stable at all.
>> For any stable enumeration you have to rely on the EUI64/NGUID/UUID.
>
> Yeah, the were always allocated through an ida and were never stable in
> any kernel version.
That's why I suspected. We had some people that were very convinced
something must have changed, and wanted to verify. Thanks for confirming.
>>> Also, separate but related question. Samsung M1725a drives don't
>>> generate entries under /dev/disk/by-path. Any idea why that might be?
>>
>> Please send a dump of the nvme-cli id-ctrl subcommand.
Please see dump attached at bottom (Appendix A)
> The 'by-path' should actually only depend on the PCI BDf and the 'nsid'
> attribute. The bdf is not necessarilly stable.
>
> If using systemd, you'd need thsi commit to get the by-path links:
>
> https://github.com/systemd/systemd/commit/b4c6f71b827d41a4af8007b735edf21ef7609f99
Thanks. I'm fairly convinced I have that patch. I can see by-path links
for Intel drives, but not the Samasungs.
[root at g-prime mrnuke]# ls /dev/disk/by-path/ |grep nvme
pci-0000:3f:00.0-nvme-1
pci-0000:3f:00.0-nvme-1-part1
pci-0000:b1:00.0-nvme-1
pci-0000:b1:00.0-nvme-1-part1
[root at g-prime mrnuke]# lspci |grep NVM
3f:00.0 Non-Volatile memory controller: Intel Corporation Express Flash
NVMe P4500
40:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe
SSD Controller 172Xa/172Xb (rev 01)
b1:00.0 Non-Volatile memory controller: Intel Corporation Express Flash
NVMe P4600
b2:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe
SSD Controller 172Xa/172Xb (rev 01)
[root at g-prime mrnuke]# nvme list
Node SN Model
Namespace Usage Format FW Rev
---------------- --------------------
---------------------------------------- ---------
-------------------------- ---------------- --------
/dev/nvme0n1 PHLF7363029G1P0GGN Dell Express Flash NVMe P4500
1.0TB SFF 1 1.00 TB / 1.00 TB 512 B + 0 B QDV1DP12
/dev/nvme1n1 PHLE7260008Z3P2EGN Dell Express Flash NVMe P4600
3.2TB SFF 1 3.20 TB / 3.20 TB 512 B + 0 B QDV1DP12
/dev/nvme2n1 S39YNX0HB00195 Dell Express Flash PM1725a 800GB
SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
/dev/nvme3n1 S39YNX0HB00293 Dell Express Flash PM1725a 800GB
SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
### Appendix A:
[root at g-prime mrnuke]# nvme id-ctrl /dev/nvme2n1
NVME Identify Controller:
vid : 0x144d
ssvid : 0x1028
sn : S39YNX0HB00195
mn : Dell Express Flash PM1725a 800GB SFF
fr : 1.0.4
rab : 8
ieee : 002538
cmic : 0x3
mdts : 5
cntlid : 21
ver : 10200
rtd3r : e4e1c0
rtd3e : 989680
oaes : 0x200
ctratt : 0
oacs : 0x6
acl : 7
aerl : 15
frmw : 0x17
lpa : 0x2
elpe : 63
npss : 0
avscc : 0x1
apsta : 0
wctemp : 343
cctemp : 350
mtfa : 120
hmpre : 0
hmmin : 0
tnvmcap : 800166076416
unvmcap : 0
rpmbs : 0
edstt : 0
dsto : 0
fwug : 0
kas : 0
hctma : 0
mntmt : 0
mxtmt : 0
sanicap : 0
sqes : 0x66
cqes : 0x44
maxcmd : 0
nn : 1
oncs : 0x16
fuses : 0
fna : 0x4
vwc : 0
awun : 65535
awupf : 0
nvscc : 1
acwu : 0
sgls : 0
subnqn :
ioccsz : 0
iorcsz : 0
icdoff : 0
ctrattr : 0
msdbd : 0
ps 0 : mp:25.00W operational enlat:100 exlat:100 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:- active_power:-
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 16:16 ` Alex_Gagniuc
@ 2018-08-03 16:54 ` Keith Busch
2018-08-03 16:58 ` Johannes Thumshirn
` (2 more replies)
0 siblings, 3 replies; 11+ messages in thread
From: Keith Busch @ 2018-08-03 16:54 UTC (permalink / raw)
On Fri, Aug 03, 2018@04:16:16PM +0000, Alex_Gagniuc@Dellteam.com wrote:
> Thanks. I'm fairly convinced I have that patch. I can see by-path links
> for Intel drives, but not the Samasungs.
>
> [root at g-prime mrnuke]# ls /dev/disk/by-path/ |grep nvme
> pci-0000:3f:00.0-nvme-1
> pci-0000:3f:00.0-nvme-1-part1
> pci-0000:b1:00.0-nvme-1
> pci-0000:b1:00.0-nvme-1-part1
>
> [root at g-prime mrnuke]# lspci |grep NVM
> 3f:00.0 Non-Volatile memory controller: Intel Corporation Express Flash NVMe P4500
> 40:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa/172Xb (rev 01)
> b1:00.0 Non-Volatile memory controller: Intel Corporation Express Flash NVMe P4600
> b2:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa/172Xb (rev 01)
>
>
> [root at g-prime mrnuke]# nvme list
> Node SN Model Namespace Usage Format FW Rev
> ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
> /dev/nvme0n1 PHLF7363029G1P0GGN Dell Express Flash NVMe P4500 1.0TB SFF 1 1.00 TB / 1.00 TB 512 B + 0 B QDV1DP12
> /dev/nvme1n1 PHLE7260008Z3P2EGN Dell Express Flash NVMe P4600 3.2TB SFF 1 3.20 TB / 3.20 TB 512 B + 0 B QDV1DP12
> /dev/nvme2n1 S39YNX0HB00195 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
> /dev/nvme3n1 S39YNX0HB00293 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
The sammy drives do not have compliant serial number. Spec requires
strings are left justified, padding spaces to the right.
Not that it should matter to the by-path symlinks...
Could you attach output from:
udevadm test -a -p $(udevadm info -q path -n /dev/nvme2n1)
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 16:54 ` Keith Busch
@ 2018-08-03 16:58 ` Johannes Thumshirn
2018-08-03 17:07 ` Keith Busch
2018-08-03 17:20 ` Alex_Gagniuc
2018-08-04 8:16 ` Christoph Hellwig
2 siblings, 1 reply; 11+ messages in thread
From: Johannes Thumshirn @ 2018-08-03 16:58 UTC (permalink / raw)
On Fri, Aug 03, 2018@10:54:11AM -0600, Keith Busch wrote:
> > [root at g-prime mrnuke]# nvme list
> > Node SN Model Namespace Usage Format FW Rev
> > ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
> > /dev/nvme0n1 PHLF7363029G1P0GGN Dell Express Flash NVMe P4500 1.0TB SFF 1 1.00 TB / 1.00 TB 512 B + 0 B QDV1DP12
> > /dev/nvme1n1 PHLE7260008Z3P2EGN Dell Express Flash NVMe P4600 3.2TB SFF 1 3.20 TB / 3.20 TB 512 B + 0 B QDV1DP12
> > /dev/nvme2n1 S39YNX0HB00195 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
> > /dev/nvme3n1 S39YNX0HB00293 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
>
> The sammy drives do not have compliant serial number. Spec requires
> strings are left justified, padding spaces to the right.
OMG, do we need quirks for serial numbers now?
--
Johannes Thumshirn Storage
jthumshirn at suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: Felix Imend?rffer, Jane Smithard, Graham Norton
HRB 21284 (AG N?rnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 16:58 ` Johannes Thumshirn
@ 2018-08-03 17:07 ` Keith Busch
0 siblings, 0 replies; 11+ messages in thread
From: Keith Busch @ 2018-08-03 17:07 UTC (permalink / raw)
On Fri, Aug 03, 2018@06:58:22PM +0200, Johannes Thumshirn wrote:
> On Fri, Aug 03, 2018@10:54:11AM -0600, Keith Busch wrote:
> > > [root at g-prime mrnuke]# nvme list
> > > Node SN Model Namespace Usage Format FW Rev
> > > ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
> > > /dev/nvme0n1 PHLF7363029G1P0GGN Dell Express Flash NVMe P4500 1.0TB SFF 1 1.00 TB / 1.00 TB 512 B + 0 B QDV1DP12
> > > /dev/nvme1n1 PHLE7260008Z3P2EGN Dell Express Flash NVMe P4600 3.2TB SFF 1 3.20 TB / 3.20 TB 512 B + 0 B QDV1DP12
> > > /dev/nvme2n1 S39YNX0HB00195 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
> > > /dev/nvme3n1 S39YNX0HB00293 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
> >
> > The sammy drives do not have compliant serial number. Spec requires
> > strings are left justified, padding spaces to the right.
>
> OMG, do we need quirks for serial numbers now?
I don't think linux cares as long as they're unique. It just looks weird.
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 16:54 ` Keith Busch
2018-08-03 16:58 ` Johannes Thumshirn
@ 2018-08-03 17:20 ` Alex_Gagniuc
2018-08-03 17:40 ` Keith Busch
2018-08-04 8:16 ` Christoph Hellwig
2 siblings, 1 reply; 11+ messages in thread
From: Alex_Gagniuc @ 2018-08-03 17:20 UTC (permalink / raw)
On 08/03/2018 11:53 AM, Keith Busch wrote:
> On Fri, Aug 03, 2018@04:16:16PM +0000, Alex_Gagniuc@Dellteam.com wrote:
>> Thanks. I'm fairly convinced I have that patch. I can see by-path links
>> for Intel drives, but not the Samasungs.
>>
>> [root at g-prime mrnuke]# ls /dev/disk/by-path/ |grep nvme
>> pci-0000:3f:00.0-nvme-1
>> pci-0000:3f:00.0-nvme-1-part1
>> pci-0000:b1:00.0-nvme-1
>> pci-0000:b1:00.0-nvme-1-part1
>>
>> [root at g-prime mrnuke]# lspci |grep NVM
>> 3f:00.0 Non-Volatile memory controller: Intel Corporation Express Flash NVMe P4500
>> 40:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa/172Xb (rev 01)
>> b1:00.0 Non-Volatile memory controller: Intel Corporation Express Flash NVMe P4600
>> b2:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa/172Xb (rev 01)
>>
>>
>> [root at g-prime mrnuke]# nvme list
>> Node SN Model Namespace Usage Format FW Rev
>> ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
>> /dev/nvme0n1 PHLF7363029G1P0GGN Dell Express Flash NVMe P4500 1.0TB SFF 1 1.00 TB / 1.00 TB 512 B + 0 B QDV1DP12
>> /dev/nvme1n1 PHLE7260008Z3P2EGN Dell Express Flash NVMe P4600 3.2TB SFF 1 3.20 TB / 3.20 TB 512 B + 0 B QDV1DP12
>> /dev/nvme2n1 S39YNX0HB00195 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
>> /dev/nvme3n1 S39YNX0HB00293 Dell Express Flash PM1725a 800GB SFF 1 800.17 GB / 800.17 GB 512 B + 0 B 1.0.4
>
> The sammy drives do not have compliant serial number. Spec requires
> strings are left justified, padding spaces to the right.
They're Koreans. They write from right to left. I don't see the problem ;)
> Not that it should matter to the by-path symlinks...
>
> Could you attach output from:
>
> udevadm test -a -p $(udevadm info -q path -n /dev/nvme2n1)
[root at g-prime mrnuke]# udevadm test -a -p $(udevadm info -q path -n
/dev/nvme2n1)
calling: test
version 238
This program is for debugging only, it does not run any program
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.
Load module index
Parsed configuration file /usr/lib/systemd/network/99-default.link
Created link configuration context.
Reading rules file: /usr/lib/udev/rules.d/10-dm.rules
Reading rules file: /usr/lib/udev/rules.d/11-dm-lvm.rules
Reading rules file: /usr/lib/udev/rules.d/11-dm-mpath.rules
Reading rules file: /usr/lib/udev/rules.d/11-dm-parts.rules
Reading rules file: /usr/lib/udev/rules.d/13-dm-disk.rules
Reading rules file: /usr/lib/udev/rules.d/40-libgphoto2.rules
/usr/lib/udev/rules.d/40-libgphoto2.rules:11: IMPORT found builtin
'usb_id --export %%p', replacing
Reading rules file: /usr/lib/udev/rules.d/40-usb-media-players.rules
Reading rules file: /usr/lib/udev/rules.d/40-usb_modeswitch.rules
Reading rules file: /usr/lib/udev/rules.d/50-udev-default.rules
Reading rules file: /usr/lib/udev/rules.d/60-block.rules
Reading rules file: /usr/lib/udev/rules.d/60-cdrom_id.rules
Reading rules file: /usr/lib/udev/rules.d/60-drm.rules
Reading rules file: /usr/lib/udev/rules.d/60-evdev.rules
Reading rules file: /usr/lib/udev/rules.d/60-ffado.rules
Reading rules file: /usr/lib/udev/rules.d/60-fprint-autosuspend.rules
Reading rules file: /usr/lib/udev/rules.d/60-input-id.rules
Reading rules file: /usr/lib/udev/rules.d/60-net.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-alsa.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-input.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage-tape.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-v4l.rules
Reading rules file: /usr/lib/udev/rules.d/60-raw.rules
Reading rules file: /usr/lib/udev/rules.d/60-rdma-ndd.rules
Reading rules file: /usr/lib/udev/rules.d/60-sensor.rules
Reading rules file: /usr/lib/udev/rules.d/60-serial.rules
Reading rules file: /usr/lib/udev/rules.d/60-u2f-hidraw.rules
Reading rules file: /usr/lib/udev/rules.d/61-kde-bluetooth-rfkill.rules
Reading rules file: /usr/lib/udev/rules.d/62-multipath.rules
Reading rules file: /usr/lib/udev/rules.d/63-md-raid-arrays.rules
Reading rules file: /usr/lib/udev/rules.d/64-btrfs-dm.rules
Reading rules file: /usr/lib/udev/rules.d/64-btrfs.rules
Reading rules file: /usr/lib/udev/rules.d/64-md-raid-assembly.rules
Reading rules file: /usr/lib/udev/rules.d/65-libwacom.rules
Reading rules file: /usr/lib/udev/rules.d/65-md-incremental.rules
Reading rules file: /usr/lib/udev/rules.d/65-sane-backends.rules
Reading rules file: /usr/lib/udev/rules.d/66-kpartx.rules
Reading rules file: /usr/lib/udev/rules.d/68-del-part-nodes.rules
Reading rules file: /usr/lib/udev/rules.d/69-btattach-bcm.rules
Reading rules file: /usr/lib/udev/rules.d/69-cd-sensors.rules
Reading rules file: /usr/lib/udev/rules.d/69-dm-lvm-metad.rules
Reading rules file: /usr/lib/udev/rules.d/69-libmtp.rules
Reading rules file: /usr/lib/udev/rules.d/70-hypervfcopy.rules
Reading rules file: /usr/lib/udev/rules.d/70-hypervkvp.rules
Reading rules file: /usr/lib/udev/rules.d/70-hypervvss.rules
Reading rules file: /usr/lib/udev/rules.d/70-joystick.rules
Reading rules file: /usr/lib/udev/rules.d/70-mouse.rules
Reading rules file: /etc/udev/rules.d/70-persistent-ipoib.rules
Reading rules file: /usr/lib/udev/rules.d/70-power-switch.rules
Reading rules file: /usr/lib/udev/rules.d/70-printers.rules
Reading rules file: /usr/lib/udev/rules.d/70-spice-vdagentd.rules
Reading rules file: /usr/lib/udev/rules.d/70-touchpad.rules
Reading rules file: /usr/lib/udev/rules.d/70-uaccess.rules
Reading rules file: /usr/lib/udev/rules.d/70-wacom.rules
Reading rules file: /usr/lib/udev/rules.d/71-seat.rules
Reading rules file: /usr/lib/udev/rules.d/73-seat-late.rules
Reading rules file: /usr/lib/udev/rules.d/75-net-description.rules
Reading rules file: /usr/lib/udev/rules.d/75-probe_mtd.rules
Reading rules file: /usr/lib/udev/rules.d/75-rdma-description.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-cinterion-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-dell-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-ericsson-mbm.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-haier-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-huawei-net-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-longcheer-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-mtk-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-nokia-port-types.rules
Reading rules file:
/usr/lib/udev/rules.d/77-mm-pcmcia-device-blacklist.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-simtech-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-telit-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-usb-device-blacklist.rules
Reading rules file:
/usr/lib/udev/rules.d/77-mm-usb-serial-adapters-greylist.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-x22x-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/77-mm-zte-port-types.rules
Reading rules file: /usr/lib/udev/rules.d/78-sound-card.rules
Reading rules file: /usr/lib/udev/rules.d/80-drivers.rules
Reading rules file: /usr/lib/udev/rules.d/80-libinput-device-groups.rules
Reading rules file: /usr/lib/udev/rules.d/80-mm-candidate.rules
Reading rules file: /usr/lib/udev/rules.d/80-net-setup-link.rules
Reading rules file: /usr/lib/udev/rules.d/80-udisks2.rules
Reading rules file: /usr/lib/udev/rules.d/82-gfs2-withdraw.rules
Reading rules file: /usr/lib/udev/rules.d/84-nm-drivers.rules
Reading rules file: /usr/lib/udev/rules.d/85-nm-unmanaged.rules
Reading rules file: /usr/lib/udev/rules.d/85-regulatory.rules
Reading rules file: /usr/lib/udev/rules.d/90-alsa-restore.rules
Reading rules file: /usr/lib/udev/rules.d/90-libgpod.rules
Reading rules file: /usr/lib/udev/rules.d/90-libinput-model-quirks.rules
Reading rules file: /usr/lib/udev/rules.d/90-pulseaudio.rules
Reading rules file: /usr/lib/udev/rules.d/90-rdma-hw-modules.rules
Reading rules file: /usr/lib/udev/rules.d/90-rdma-ulp-modules.rules
Reading rules file: /usr/lib/udev/rules.d/90-rdma-umad.rules
Reading rules file: /usr/lib/udev/rules.d/90-vconsole.rules
Reading rules file: /usr/lib/udev/rules.d/91-drm-modeset.rules
Reading rules file: /usr/lib/udev/rules.d/95-cd-devices.rules
Reading rules file: /usr/lib/udev/rules.d/95-dm-notify.rules
Reading rules file: /usr/lib/udev/rules.d/95-upower-csr.rules
Reading rules file: /usr/lib/udev/rules.d/95-upower-hid.rules
Reading rules file: /usr/lib/udev/rules.d/95-upower-wup.rules
Reading rules file: /usr/lib/udev/rules.d/98-kexec.rules
Reading rules file: /usr/lib/udev/rules.d/98-rdma.rules
Reading rules file: /usr/lib/udev/rules.d/99-qemu-guest-agent.rules
Reading rules file: /usr/lib/udev/rules.d/99-systemd.rules
Reading rules file: /usr/lib/udev/rules.d/99-vmware-scsi-udev.rules
rules contain 393216 bytes tokens (32768 * 12 bytes), 40129 bytes strings
47125 strings (381339 bytes), 43170 de-duplicated (345166 bytes), 3956
trie nodes used
LINK 'disk/by-id/nvme-eui.3339593048b001950025385800000001'
/usr/lib/udev/rules.d/60-persistent-storage.rules:19
LINK
'disk/by-id/nvme-Dell_Express_Flash_PM1725a_800GB_SFF__S39YNX0HB00195'
/usr/lib/udev/rules.d/60-persistent-storage.rules:26
IMPORT builtin 'blkid' /usr/lib/udev/rules.d/60-persistent-storage.rules:90
probe /dev/nvme2n1 raid offset=0
LINK 'disk/by-uuid/bf1f37cd-55d1-40e2-8d2f-faf01728aac0'
/usr/lib/udev/rules.d/60-persistent-storage.rules:93
handling device node '/dev/nvme2n1', devnum=b259:5, mode=0600, uid=0, gid=0
preserve already existing symlink '/dev/block/259:5' to '../nvme2n1'
found 'b259:5' claiming
'/run/udev/links/\x2fdisk\x2fby-id\x2fnvme-Dell_Express_Flash_PM1725a_800GB_SFF__S39YNX0HB00195'
creating link
'/dev/disk/by-id/nvme-Dell_Express_Flash_PM1725a_800GB_SFF__S39YNX0HB00195'
to '/dev/nvme2n1'
preserve already existing symlink
'/dev/disk/by-id/nvme-Dell_Express_Flash_PM1725a_800GB_SFF__S39YNX0HB00195'
to '../../nvme2n1'
found 'b259:5' claiming
'/run/udev/links/\x2fdisk\x2fby-id\x2fnvme-eui.3339593048b001950025385800000001'
creating link
'/dev/disk/by-id/nvme-eui.3339593048b001950025385800000001' to
'/dev/nvme2n1'
preserve already existing symlink
'/dev/disk/by-id/nvme-eui.3339593048b001950025385800000001' to
'../../nvme2n1'
found 'b259:5' claiming
'/run/udev/links/\x2fdisk\x2fby-uuid\x2fbf1f37cd-55d1-40e2-8d2f-faf01728aac0'
creating link '/dev/disk/by-uuid/bf1f37cd-55d1-40e2-8d2f-faf01728aac0'
to '/dev/nvme2n1'
preserve already existing symlink
'/dev/disk/by-uuid/bf1f37cd-55d1-40e2-8d2f-faf01728aac0' to '../../nvme2n1'
.ID_FS_TYPE_NEW=ext3
ACTION=-p
DEVLINKS=/dev/disk/by-id/nvme-eui.3339593048b001950025385800000001
/dev/disk/by-id/nvme-Dell_Express_Flash_PM1725a_800GB_SFF__S39YNX0HB00195
/dev/disk/by-uuid/bf1f37cd-55d1-40e2-8d2f-faf01728aac0
DEVNAME=/dev/nvme2n1
DEVPATH=/devices/virtual/nvme-subsystem/nvme-subsys2/nvme2n1
DEVTYPE=disk
ID_FS_TYPE=ext3
ID_FS_USAGE=filesystem
ID_FS_UUID=bf1f37cd-55d1-40e2-8d2f-faf01728aac0
ID_FS_UUID_ENC=bf1f37cd-55d1-40e2-8d2f-faf01728aac0
ID_FS_VERSION=1.0
ID_MODEL=Dell Express Flash PM1725a 800GB SFF
ID_SERIAL=Dell Express Flash PM1725a 800GB SFF_ S39YNX0HB00195
ID_SERIAL_SHORT= S39YNX0HB00195
ID_WWN=eui.3339593048b001950025385800000001
MAJOR=259
MINOR=5
SUBSYSTEM=block
TAGS=:systemd:
USEC_INITIALIZED=8235082
Unload module index
Unloaded link configuration context.
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 17:20 ` Alex_Gagniuc
@ 2018-08-03 17:40 ` Keith Busch
0 siblings, 0 replies; 11+ messages in thread
From: Keith Busch @ 2018-08-03 17:40 UTC (permalink / raw)
On Fri, Aug 03, 2018@05:20:39PM +0000, Alex_Gagniuc@Dellteam.com wrote:
> DEVPATH=/devices/virtual/nvme-subsystem/nvme-subsys2/nvme2n1
Must be CMIC controller with CONFIG_NVME_MULTIPATH=y, otherwise you
wouldn't have a a 'virtual' DEVPATH. We can't make by-path links
for these.
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-03 16:54 ` Keith Busch
2018-08-03 16:58 ` Johannes Thumshirn
2018-08-03 17:20 ` Alex_Gagniuc
@ 2018-08-04 8:16 ` Christoph Hellwig
2018-08-05 15:48 ` Alex_Gagniuc
2 siblings, 1 reply; 11+ messages in thread
From: Christoph Hellwig @ 2018-08-04 8:16 UTC (permalink / raw)
On Fri, Aug 03, 2018@10:54:11AM -0600, Keith Busch wrote:
> The sammy drives do not have compliant serial number. Spec requires
> strings are left justified, padding spaces to the right.
It doesn't look like Samsung fucked it up but Dell..
On the plus side that should give us more of a chance to fix it :)
^ permalink raw reply [flat|nested] 11+ messages in thread
* How /dev/nvme numbers are allocated/mapped to BDF
2018-08-04 8:16 ` Christoph Hellwig
@ 2018-08-05 15:48 ` Alex_Gagniuc
0 siblings, 0 replies; 11+ messages in thread
From: Alex_Gagniuc @ 2018-08-05 15:48 UTC (permalink / raw)
On 08/04/2018 03:16 AM, Christoph Hellwig wrote:
> On Fri, Aug 03, 2018@10:54:11AM -0600, Keith Busch wrote:
>> The sammy drives do not have compliant serial number. Spec requires
>> strings are left justified, padding spaces to the right.
>
> It doesn't look like Samsung fucked it up but Dell..
>
> On the plus side that should give us more of a chance to fix it :)
You underestimate Dell's kindness. These drives were intentionally
released with Koren serial numbers to give the linux folk a test
platform. :)
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2018-08-05 15:48 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-08-02 22:09 How /dev/nvme numbers are allocated/mapped to BDF Alex_Gagniuc
2018-08-03 7:18 ` Christoph Hellwig
2018-08-03 14:40 ` Keith Busch
2018-08-03 16:16 ` Alex_Gagniuc
2018-08-03 16:54 ` Keith Busch
2018-08-03 16:58 ` Johannes Thumshirn
2018-08-03 17:07 ` Keith Busch
2018-08-03 17:20 ` Alex_Gagniuc
2018-08-03 17:40 ` Keith Busch
2018-08-04 8:16 ` Christoph Hellwig
2018-08-05 15:48 ` Alex_Gagniuc
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