linux-kernel - Re: [PATCH v3 0/6] libsas and drivers: NCQ error handling

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Date:   Wed, 21 Sep 2022 09:09:46 +0100
From:   John Garry <john.garry@...wei.com>
To:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <jinpu.wang@...ud.ionos.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <yangxingui@...wei.com>, <hare@...e.de>
Subject: Re: [PATCH v3 0/6] libsas and drivers: NCQ error handling

On 21/09/2022 04:59, Damien Le Moal wrote:
> I tested this series on top of the current Linus tree. All look good. As 
> ususal, I hammered an SMR drive connected to a pm80xx adapter and 
> generated lots of invalid commands to check EH. No issues that I can see.
> E.g., an unaligned write error look like this:
> 
> [ 5384.194853] pm80xx0:: mpi_sata_event 2685: SATA EVENT 0x23
> [ 5384.238720] sas: Enter sas_scsi_recover_host busy: 1 failed: 1
> [ 5384.246171] sas: sas_scsi_find_task: aborting task 0x0000000050be2a4b
> [ 5384.254654] pm80xx0:: mpi_sata_completion 2292: task null, freeing 
> CCB tag 2
> [ 5384.254676] sas: sas_scsi_find_task: task 0x0000000050be2a4b is aborted
> [ 5384.294659] sas: sas_eh_handle_sas_errors: task 0x0000000050be2a4b is 
> aborted
> [ 5384.318691] ata22.00: exception Emask 0x0 SAct 0x200000 SErr 0x0 
> action 0x0
> [ 5384.328425] ata22.00: failed command: WRITE FPDMA QUEUED
> [ 5384.336277] ata22.00: cmd 61/01:00:01:00:ea/00:00:02:00:00/40 tag 21 
> ncq dma 4096 out
> [ 5384.336277]          res 43/04:01:01:00:ea/00:00:02:00:00/00 Emask 
> 0x400 (NCQ error) <F>
> [ 5384.357299] ata22.00: status: { DRDY SENSE ERR }
> [ 5384.364459] ata22.00: error: { ABRT }
> [ 5384.553177] ata22.00: configured for UDMA/133
> [ 5384.560343] sd 19:0:3:0: [sdl] tag#80 FAILED Result: hostbyte=DID_OK 
> driverbyte=DRIVER_OK cmd_age=0s
> [ 5384.572175] sd 19:0:3:0: [sdl] tag#80 Sense Key : Illegal Request 
> [current]
> [ 5384.581765] sd 19:0:3:0: [sdl] tag#80 Add. Sense: Unaligned write 
> command
> [ 5384.591126] sd 19:0:3:0: [sdl] tag#80 CDB: Write(16) 8a 00 00 00 00 
> 00 02 ea 00 01 00 00 00 01 00 00
> [ 5384.602938] I/O error, dev sdl, sector 391118856 op 0x1:(WRITE) flags 
> 0x8800 phys_seg 1 prio class 2
> [ 5384.613854] ata22: EH complete
> [ 5384.618570] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 1 
> tries: 1
> 
> So looks good to me.
> 
> Feel free to add:
> 
> Tested-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>

Great, thanks very much. I'll send an updated version based on mkp-scsi 
6.1 queue today.

John