Re: "WRITE SAME failed. Manually zeroing" with 3w-xxxx driver

From: Florian Westphal
Date: Tue Apr 30 2013 - 03:36:55 EST

Martin K. Petersen <martin.petersen@xxxxxxxxxx> wrote:
> >>>>> "Florian" == Florian Westphal <fw@xxxxxxxxx> writes:
> Florian> After update to 3.8 dmesg is spammed with: kernel: [
> Florian> 280.272094] 3w-xxxx: scsi8: Unknown scsi opcode: 0x41 kernel: [
> Florian> 280.272107] sd 8:0:0:0: [sda] Unhandled error code kernel:
> Could you please test the patch below?

Works. Only one WRITE_SAME error at boot, max_write_same_blocks in sysfs
is 0, which wasn't the case before.

> The second question is what it is that's issuing these zeroouts at boot?
> Which filesystem are you using? What's your DM/MD config?

ext4, no DM/MD is used. I guess the zeroouts are from postgres, but i'm
not sure.

> 3w-xxxx: Create sense buffer for unsupported commands
> Make the driver return appropriate sense data when an unsupported
> operation is queued. This will cause the SCSI layer to stop issuing the
> offending command.
> Reported-by: Florian Westphal <fw@xxxxxxxxx>
> CC: adam radford <aradford@xxxxxxxxx>
> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

Tested-by: Florian Westphal <fw@xxxxxxxxx>

Thanks again.
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