Public bug reported:
The guest OS Ubuntu 25.04 is failed to recognize the new disk hot-added
to the existing lsilogicsas controller.
Ubuntu 25.04 kernel version: 6.14.0-15-generic
Steps to reproduce:
----------------------
1) Install an Ubuntu 25.04 VM on an ESXi server.
2) Hot-add an lsilogicsas controller and an lsilogicsas disk.
Developer's analysis:
-----------------------
I played with the ESXi and VM(ubuntu 25.04) and found the pattern, for a
specific disk:
The first hot add succeeded, and hot remove also would succeed. Then the second
hot add will fail, if we hot remove that disk and hot add it again, it will
succeed. This will be a cycle.
Ubuntu linux kernel log:
[64066.756074] mptsas: ioc0: attaching ssp device: fw_channel 0, fw_id 0, phy
0, sas_addr 0x5000c2983be241c6
[64066.766148] scsi 33:0:3:0: Direct-Access VMware Virtual disk 2.0
PQ: 0 ANSI: 6
[64066.774257] sd 33:0:3:0: Attached scsi generic sg1 type 0
[64066.774819] sd 33:0:3:0: [sdb] 2097152 512-byte logical blocks: (1.07
GB/1.00 GiB)
[64066.775144] sd 33:0:3:0: [sdb] Write Protect is off
[64066.775148] sd 33:0:3:0: [sdb] Mode Sense: 3b 00 00 00
[64066.775724] sd 33:0:3:0: [sdb] Write cache: disabled, read cache: disabled,
doesn't support DPO or FUA
[64066.789488] sd 33:0:3:0: [sdb] Attached SCSI disk <------- Successful add
[64087.940119] end_device-33:3: mptsas: ioc0: removing ssp device: fw_channel
0, fw_id 0, phy 0,sas_addr 0x5000c2983be241c6
[64087.940128] phy-33:0: mptsas: ioc0: delete phy 0, phy-obj
(0x00000000caa762dc)
[64087.940139] port-33:3: mptsas: ioc0: delete port 3, sas_addr
(0x5000c2983be241c6)
[64087.952180] scsi target33:0:3: mptsas: ioc0: delete device: fw_channel 0,
fw_id 0, phy 0, sas_addr 0x5000c2983be241c6 <----- Successful remove
[64115.911028] workqueue: mptsas_firmware_event_work [mptsas] hogged CPU
for >13333us 7 times, consider switching to WQ_UNBOUND <----- Warning
along with hot add failure
Looks like the hot add/remove event was not handled in time in Linux
kernel.
On the same host, I also installed Debian 12 with 6.1.129 kernel and HWv
9.0, disk hot add/remove on LSI controller works fine. It's an upstream
linux kernel issue.
** Affects: kernel-package (Ubuntu)
Importance: Undecided
Status: New
** Package changed: ndctl (Ubuntu) => kernel-package (Ubuntu)
** Description changed:
The guest OS Ubuntu 25.04 is failed to recognize the new disk hot-added
to the existing lsilogicsas controller.
Ubuntu 25.04 kernel version: 6.14.0-15-generic
Steps to reproduce:
----------------------
1) Install an Ubuntu 25.04 VM on an ESXi server.
2) Hot-add an lsilogicsas controller and an lsilogicsas disk.
+
Developer's analysis:
-----------------------
I played with the ESXi and VM(ubuntu 25.04) and found the pattern, for a
specific disk:
The first hot add succeeded, and hot remove also would succeed. Then the
second hot add will fail, if we hot remove that disk and hot add it again, it
will succeed. This will be a cycle.
Ubuntu linux kernel log:
[64066.756074] mptsas: ioc0: attaching ssp device: fw_channel 0, fw_id 0, phy
0, sas_addr 0x5000c2983be241c6
[64066.766148] scsi 33:0:3:0: Direct-Access VMware Virtual disk 2.0
PQ: 0 ANSI: 6
[64066.774257] sd 33:0:3:0: Attached scsi generic sg1 type 0
[64066.774819] sd 33:0:3:0: [sdb] 2097152 512-byte logical blocks: (1.07
GB/1.00 GiB)
[64066.775144] sd 33:0:3:0: [sdb] Write Protect is off
[64066.775148] sd 33:0:3:0: [sdb] Mode Sense: 3b 00 00 00
[64066.775724] sd 33:0:3:0: [sdb] Write cache: disabled, read cache:
disabled, doesn't support DPO or FUA
[64066.789488] sd 33:0:3:0: [sdb] Attached SCSI disk <------- Successful add
[64087.940119] end_device-33:3: mptsas: ioc0: removing ssp device:
fw_channel 0, fw_id 0, phy 0,sas_addr 0x5000c2983be241c6
[64087.940128] phy-33:0: mptsas: ioc0: delete phy 0, phy-obj
(0x00000000caa762dc)
[64087.940139] port-33:3: mptsas: ioc0: delete port 3, sas_addr
(0x5000c2983be241c6)
[64087.952180] scsi target33:0:3: mptsas: ioc0: delete device: fw_channel 0,
fw_id 0, phy 0, sas_addr 0x5000c2983be241c6 <----- Successful remove
[64115.911028] workqueue: mptsas_firmware_event_work [mptsas] hogged CPU
for >13333us 7 times, consider switching to WQ_UNBOUND <----- Warning
along with hot add failure
Looks like the hot add/remove event was not handled in time in Linux
kernel.
On the same host, I also installed Debian 12 with 6.1.129 kernel and HWv
9.0, disk hot add/remove on LSI controller works fine. It's an upstream
linux kernel issue.
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https://bugs.launchpad.net/bugs/2109465
Title:
The guest OS Ubuntu 25.04 is failed to recognize the new disk hot-
added to the existing lsilogicsas controller.
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