Re: 2.6.32.2 SATA link detect failed, 2.6.32.1 works fine

[Bjarke Istrup Pedersen <gurligebis@gmail.com>]

2009/12/23 fengxiangjun <fengxiangjun@neusoft.com>:
>
> Hi,
>
> with this patch, the problem still exists.
>
> ata1.01: XXX debounce start, SStatus=4
> ata1.01: XXX debounce done, SStatus=4, DET stable for 520 msecs
> ata1.00: SATA link down (SStatus 0 SControl 301)
> ata1.01: SATA link down (SStatus 0 Scontrol 300)
> ...
> VFS; cannot open root device ...
>
> The kernel just panic, and I can't see what's the messege printing before
> that.
>
> So, I tried 'console=ttyS0 console=tty1'，full dmesg attached。
>
> $ hdparm -I /dev/sda:
>
> /dev/sda:
>
> ATA device, with non-removable media
>        Model Number:       WDC WD800JD-60LSA5
>        Serial Number:      WD-WCAM9T882872
>        Firmware Revision:  10.01E03
> Standards:
>        Supported: 7 6 5 4
>        Likely used: 8
> Configuration:
>        Logical         max     current
>        cylinders       16383   16383
>        heads           16      16
>        sectors/track   63      63
>        --
>        CHS current addressable sectors:   16514064
>        LBA    user addressable sectors:  156301488
>        LBA48  user addressable sectors:  156301488
>        device size with M = 1024*1024:       76319 MBytes
>        device size with M = 1000*1000:       80026 MBytes (80 GB)
>        cache/buffer size  = 8192 KBytes
> Capabilities:
>        LBA, IORDY(can be disabled)
>        Standby timer values: spec'd by Standard, with device specific
> minimum
>        R/W multiple sector transfer: Max = 16  Current = 16
>        DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
>             Cycle time: min=120ns recommended=120ns
>        PIO: pio0 pio1 pio2 pio3 pio4
>             Cycle time: no flow control=120ns  IORDY flow control=120ns
> Commands/features:
>        Enabled Supported:
>           *    SMART feature set
>                Security Mode feature set
>           *    Power Management feature set
>           *    Write cache
>           *    Look-ahead
>           *    WRITE_BUFFER command
>           *    READ_BUFFER command
>           *    NOP cmd
>           *    DOWNLOAD_MICROCODE
>           *    48-bit Address feature set
>           *    Device Configuration Overlay feature set
>           *    Mandatory FLUSH_CACHE
>           *    FLUSH_CACHE_EXT
>           *    SMART error logging
>           *    SMART self-test
>           *    General Purpose Logging feature set
>           *    SATA-I signaling speed (1.5Gb/s)
>           *    SATA-II signaling speed (3.0Gb/s)
>           *    Phy event counters
>                Device-initiated interface power management
>           *    Software settings preservation
>           *    SMART Command Transport (SCT) feature set
>           *    SCT Long Sector Access (AC1)
>           *    SCT LBA Segment Access (AC2)
>           *    SCT Error Recovery Control (AC3)
>           *    SCT Features Control (AC4)
>           *    SCT Data Tables (AC5)
>                unknown 206[12] (vendor specific)
> Security:
>        Master password revision code = 65534
>                supported
>        not     enabled
>        not     locked
>                frozen
>        not     expired: security count
>                supported: enhanced erase
>        24min for SECURITY ERASE UNIT. 24min for ENHANCED SECURITY ERASE
> UNIT.
> Checksum: correct
>
> Thanks.
>
> On Wed, 23 Dec 2009, Tejun Heo wrote:
>
>> Hello,
>>
>> On 12/22/2009 11:02 AM, fengxiangjun wrote:
>> > You are right, it's definitely timing related.
>> >
>> > I just tried capturing the failed booting message through a null modem
>> > cable, but the problem goes away! It seems that I can't reproduce it
>> > with serial console attached.
>>
>> Hmmm... this is the second report of probing failure with SIDPR based
>> hardreset.  Can you please apply the attached patch and see whether
>> the problem is reproducible?  And if so, please attach full boot log.
>> Can you please also attach hdparm -I output of the occassionally
>> failing drive.
>>
>> Thanks.
>>
>> --
>> tejun
>>
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Hey,

Could it be an idea to do a bisect for the patch that makes it break? :)

/Bjarke