I have a guest vm, kvm based, and I’m seeing this ATA reset in dmesg. When this happens, performance plummits.
Cloudstack-4.17.1
Guest VM is Rocky 9.1.
[ 1332.734551] ata1: lost interrupt (Status 0x58)
[ 1351.076960] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 1351.077041] ata1.00: failed command: WRITE DMA EXT
[ 1351.077053] ata1.00: cmd 35/00:00:98:9e:dd/00:02:00:00:00/e0 tag 0 dma
262144 out
res 40/00:01:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
[ 1351.077101] ata1.00: status: { DRDY }
[ 1351.077325] ata1: soft resetting link
[ 1351.235558] ata1: found unknown device (class 0)
[ 1351.237686] ata1.00: configured for MWDMA2
[ 1351.237733] ata1: EH complete
Since this is the only VM I’m experiencing this issue on, I don’t believe this
is hardware related. I’ve migrated the VM to multiple hosts and the vm carries
this issues wherever it goes.
Backend storage is Ceph.
How would I troubleshoot this?
Thanks
-jeremy
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