Public bug reported:
Issue found on node entei with Focal kernel.
When trying to run this test, it will try to break 4 devices on Focal,
and one of them is using the AHCI driver:
$ sudo ./eeh-basic.sh
0000:00:00.0, Skipped: bridge
0001:00:00.0, Skipped: bridge
0020:00:00.0, Skipped: bridge
0021:00:00.0, Skipped: bridge
0021:01:00.0, Skipped: bridge
0021:02:01.0, Skipped: bridge
0021:02:08.0, Skipped: bridge
0021:02:09.0, Skipped: bridge
0021:02:0a.0, Skipped: bridge
0021:02:0b.0, Skipped: bridge
0021:02:0c.0, Skipped: bridge
0021:0d:00.0, Added
0021:0e:00.0, Added
0021:0f:00.0, Skipped: bridge
0021:10:00.0, Added
0022:00:00.0, Skipped: bridge
0022:01:00.0, Added
Found 4 breakable devices...
Breaking 0021:0d:00.0...
0021:0d:00.0, waited 0/60
0021:0d:00.0, waited 1/60
0021:0d:00.0, waited 2/60
0021:0d:00.0, waited 3/60
0021:0d:00.0, waited 4/60
0021:0d:00.0, waited 5/60
0021:0d:00.0, waited 6/60
0021:0d:00.0, waited 7/60
0021:0d:00.0, waited 8/60
0021:0d:00.0, Recovered after 9 seconds
Breaking 0021:0e:00.0...
0021:0e:00.0, waited 0/60
0021:0e:00.0, waited 1/60
./eeh-basic.sh: 74: sleep: Input/output error
0021:0e:00.0, waited 2/60
./eeh-basic.sh: 74: sleep: Input/output error
0021:0e:00.0, waited 3/60
./eeh-basic.sh: 74: sleep: Input/output error
....
./eeh-basic.sh: 74: sleep: Input/output error
0021:0e:00.0, waited 59/60
./eeh-basic.sh: 74: sleep: Input/output error
0021:0e:00.0, waited 60/60
./eeh-basic.sh: 74: sleep: Input/output error
0021:0e:00.0, Failed to recover!
Breaking 0021:10:00.0...
Skipping 0021:10:00.0, Initial PE state is not ok
Breaking 0022:01:00.0...
Skipping 0022:01:00.0, Initial PE state is not ok
3 devices failed to recover (4 tested)
./eeh-basic.sh: 81: lspci: Input/output error
./eeh-basic.sh: 81: diff: Input/output error
./eeh-basic.sh: 82: rm: Input/output error
./eeh-basic.sh: 84: test: 3: unexpected operator
With the driver failed to recovery, the system will start acting up.
$ ls
ls: command not found
And drop into read-only state, dmesg can be found in the attachment.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Incomplete
** Attachment added: "eeh-basic-dmesg.log"
https://bugs.launchpad.net/bugs/1916468/+attachment/5465912/+files/eeh-basic-dmesg.log
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1916468
Title:
powerpc/eeh-basic.sh in kselftest make P8 node stopped working
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