reset SATA with ondemand governor in 2.6.22.3/2.6.23-rc3

["佐藤 大輔" <densuke@gmail.com>]

Hi, there

In kernel 2.6.22.3/2.6.23-rc3, SATA HDD reset with using ondemand governor.
(no error in performance governor)

>ata2: exception Emask 0x10 SAct 0x0 SErr 0x90200 action 0x6 frozen
>ata2: irq_stat 0x00400000, PHY RDY changed
>ata2: hard resetting port
>ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>ata2.00: Host Protected Area detected:
>       current size: 312579695 sectors
>        native size: 312581808 sectors
>ata2.00: Host Protected Area detected:
>        current size: 312579695 sectors
>        native size: 312581808 sectors
>ata2.00: configured for UDMA/100
>ata2: EH complete
>sd 2:0:0:0: [sda] 312579695 512-byte hardware sectors (160041 MB)
>sd 2:0:0:0: [sda] Write Protect is off
>sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
>sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA

Anyone caught this error?

HDD: Travelstar 5K160
CPU: AMD Athlon XP BE-2350
HDD controller: SB600(AHCI mode), using ahci.ko
Kernel: 2.6.22.3/2.6.23-rc3

thanks.

Attachment: config
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