Re: sata_mv, io stucks

[Harri Olin <harri.olin@gmail.com>]

Mark Lord wrote:
>>> Two marvell controllers, 16 disks, software raid10, IO stucks on 
>>> different disks, kernel 2.6.26.5.
>>> With default ubuntu's 8.04 2.6.24 kernel the problem can not be 
>>> repeated
>>>
>>>
>>> [  289.851609] ata11.00: exception Emask 0x0 SAct 0x1 SErr 0x0 
>>> action 0x6 frozen
>>> [  289.851695] ata11.00: cmd 61/08:00:60:1e:bf/00:00:01:00:00/40 tag 
>>> 0 ncq 4096 out
>>> [  289.851697]          res 40/00:00:00:00:00/00:00:00:00:00/00 
>>> Emask 0x4 (timeout)
>>> [  289.851774] ata11.00: status: { DRDY }
>>> [  289.851834] ata11: hard resetting link
>>> [  290.649259] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>>> [  290.749239] ata11.00: max_sectors limited to 256 for NCQ
>>> [  290.809189] ata11.00: max_sectors limited to 256 for NCQ
>>> [  290.809194] ata11.00: configured for UDMA/133
>>> [  290.809200] ata11: EH complete
>>> [  290.809242] sd 10:0:0:0: [sdk] 1953525168 512-byte hardware 
>>> sectors (1000205 MB)
>>> [  290.809258] sd 10:0:0:0: [sdk] Write Protect is off
>>> [  290.809263] sd 10:0:0:0: [sdk] Mode Sense: 00 3a 00 00
>>> [  290.809286] sd 10:0:0:0: [sdk] Write cache: enabled, read cache: 
>>> enabled, doesn't support DPO or FUA
> ...
>
> I've just returned here from a month holiday in Italy,
> and I'll have a look at this and other sata_mv issues
> next week or so.

I ran git-bisect on it and it returned 
a3718c1f230240361ed92d3e53342df0ff7efa8c as first bad commit. Also 
verified by hand that patching it on working tree breaks it.

-- 
Harri.