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From: "Kumar, Sumit" <sumitkum@amd•com>
To: <linux-next@vger•kernel.org>
Cc: <Narasimhan.V@amd•com>
Subject: [REGRESSION] Boot failure on NVMe multipath LVM root since 6.19-rc8 (dracut cannot find root)
Date: Mon, 16 Feb 2026 22:20:37 +0530	[thread overview]
Message-ID: <4e10448b-2c29-4ddc-974c-63159549cc23@amd.com> (raw)

Hi,

I am observing a boot regression where the system fails to boot and drops into the dracut emergency shell because the LVM root device is not detected. The issue is reproducible with both linux-next and mainline kernels.

Regression Status (linux-next):
 Boot passes: 6.19.0-rc7-next-20260129
 Boot fails: 6.19.0-rc8-next-20260203
This indicates a regression introduced between the above kernel versions.

Environment:
 Distribution: RHEL-based system
 Storage: NVMe disk with multipath
 Root filesystem: LVM on NVMe multipath device
 Boot method: local disk

System layout:
 [root@cinnabar-3f48host ~]# lsblk
 nvme1n1
 ├─nvme1n1p1   /boot/efi
 ├─nvme1n1p2   /boot
 └─nvme1n1p3
   ├─rhel_cinnabar--3f48host-root  /
   ├─rhel_cinnabar--3f48host-swap  [SWAP]
   └─rhel_cinnabar--3f48host-home  /home

The affected system has the root disk configured on multipath over NVMe.
A system configured with multipath over SCSI disk boots successfully and does not show this issue.

Problem Description:

During boot, initramfs fails to detect the LVM root and swap devices and eventually enters dracut   emergency mode.

Actual Behavior:

[ 202.597607] dracut-initqueue[1317]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2frhel_cinnabar-3f48host\x2froot.sh: "[ -e "/dev/rhel_cinnabar-3f48host/root" ]"

[ 202.599178] dracut-initqueue[1317]: Warning: /lib/dracut/hooks/initqueue/finished/devexists-\x2fdev\x2frhel_cinnabar-3f48host\x2fswap.sh: "[ -e "/dev/rhel_cinnabar-3f48host/swap" ]"

[ 202.601189] dracut-initqueue[1317]: Warning: dracut-initqueue: starting timeout scripts
[ 202.601312] dracut-initqueue[1317]: Warning: Could not boot.

Starting Dracut Emergency Shell...
Warning: /dev/mapper/rhel_cinnabar--3f48host-root does not exist
Warning: /dev/rhel_cinnabar-3f48host/root does not exist
Warning: /dev/rhel_cinnabar-3f48host/swap does not exist
Generating "/run/initramfs/rdsosreport.txt"
Entering emergency mode.


The system generates /run/initramfs/rdsosreport.txt and drops to the dracut shell.

Expected Behavior:
The system should detect the LVM volumes and boot normally.

Steps to Reproduce:
1. Checkout linux-next tag `6.19.0-rc7-next-20260129`.
2. Build and install the kernel.
3. Boot the system → boot succeeds.
4. Checkout linux-next tag `6.19.0-rc8-next-20260203`.
5. Build and install the kernel.
6. Boot the system → boot fails and drops to dracut emergency shell.

The issue reproduces consistently on systems with NVMe multipath root.

Mainline Results:
The same issue is also observed with mainline kernels:
 Boot passes with 6.19.0-72c395024dac.
 Boot failure starts from 6.19.0-192c0159402e, where the system drops to the dracut emergency shell with   the same behavior described above.


Please let me know if additional logs, kernel configuration, or further debugging information is required.

Thanks,
Sumit Kumar

next             reply	other threads:[~2026-02-16 16:50 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-16 16:50 Kumar, Sumit [this message]
2026-02-17 16:59 ` [REGRESSION] Boot failure on NVMe multipath LVM root since 6.19-rc8 (dracut cannot find root) Thorsten Leemhuis

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