On 11/02/2022 12:37, Damien Le Moal wrote:
Hi Damien,
Sometimes I get TMF timeouts, which is a bad situation. I guess it's a
subtle driver bug, but where ....?
What is the command failing ? Always the same ? Can you try adding scsi
trace to see the commands ?
This is the same issue I have had since day #1.
Generally mount/unmount or even fdisk -l fails after booting into
miniramfs. I wouldn't ever try to boot a distro.
If you are "lucky", it is always the same type of command like for the
NCQ NON DATA in my case.
I'm just trying SAS disks to start with - so it's an SCSI READ command.
SATA/STP support is generally never as robust for SAS HBAs (HW and LLD
bugs are common - as this series is evidence) so I start on something
more basic - however SATA/STP also has this issue.
The command is sent successfully but just never completes. Then
sometimes the TMFs for error handling timeout and sometimes succeed. I
don't have much to do on....
Though on mount, I would only expect a lot of
read commands and not much else.
Yes, and it is commonly the first SCSI read command which times out. It
reliably breaks quite early. So I can think we can rule out issues like
memory barriers/timing.
There may be some writes and a flush
too, so there will be "data" commands and "non data" commands. It may be
an issue with non-data commands too ?
Not sure on that. I guess it isn't.
Thanks,
John
