Dear Roger,
Am 22.02.21 um 15:23 schrieb Roger Willcocks:
FYI we have exactly this issue on a machine here running CentOS 8.3
(kernel 4.18.0-240.1.1) (so presumably this happens in RHEL 8 too.)
What driver version do you use?
Controller is MSCC / Adaptec 3154-8i16e driving 60 x 12TB HGST drives
configured as five x twelve-drive raid-6, software striped using md,
and formatted with xfs.
Test software writes to the array using multiple threads in
parallel.
The smartpqi driver would report controller offline within ten
minutes or so, with status code 0x6100c
Changed the driver to set 'nr_hw_queues = 1’ and then tested by
filling the array with random files (which took a couple of days),
which completed fine, so it looks like that one-line change fixes
it.
Would, of course, be helpful if this was back-ported.
We only noticed the issue starting with Linux 5.5 (commit 6eb045e092ef
("scsi: core: avoid host-wide host_busy counter for scsi_mq").
So I am curious how this problem can be in CentOS 8.3 (Linux kernel 4.18.x).
—
Roger
Apple Mail mangled your signature delimiter (-- ).
Kind regards,
Paul
