Bug 204761

Summary:	Regression MEGARAID_SAS since 5.2 kernel
Product:	IO/Storage	Reporter:	Darko Luketic (info)
Component:	Serial ATA	Assignee:	Tejun Heo (tj)
Status:	NEW ---
Severity:	blocking
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	5.2	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	dmesg output

Description Darko Luketic 2019-09-03 14:50:20 UTC

My distribution is Gentoo Linux.
This is a production system.

When I upgraded from 5.1.16 to 5.2.1 and following kernels (untested with 5.2.11)
the result was an unbootable system.
In particular, I asked the datacenter support to connect a KVM console to the server and I watched what happened in the boot process.
The result was "the GUID xyz could not be found".
I have then checked /dev and nothing disk related was there.
The driver is embedded <*> and the 5.1.16 config was taken with --oldconfig.

If you need any more info I'll try to provide.

See also:
https://forums.gentoo.org/viewtopic-t-1099598.html

Comment 1 Darko Luketic 2019-09-10 10:59:13 UTC

The issue was related to naming of devices.
I'm not sure what really was the issue.
Fact is the devices were not there. No /dev/disk/by-uuid/ or similar not even /dev/sda were present.
Now I've compiled 5.2.13 and plugged a remote kvm console into the server.
Which showed me that the network interface that was named `enp5s0` is now named `p5p1`.
So it has to be some combination of kernel 5.2 and systemd 242 or 243rc1 243rc2

Comment 2 Darko Luketic 2019-09-10 10:59:57 UTC

Created attachment 284905 [details]
dmesg output