ahci hangs on Supermicro MicroCloud second channel

[Steven Hartland]

----- Original Message ----- 
From: "Dmitry Morozovsky" <marck at rinet.ru>
To: <freebsd-stable at FreeBSD.org>
Cc: <mav at FreeBSD.org>
Sent: Sunday, March 18, 2012 4:10 PM
Subject: ahci hangs on Supermicro MicroCloud second channel


> Dear colleagues,
>
> I've start testing SuperMicro MicroCloud[1] to have high-density routers
> cluster, and experiencing strange effects with disk subsystem:
>
> - on stable/8, it does detect AHCI controller, but detects disks as non-ahci
> ad*
> - on stable/9, disks are shown as ada*, but disk on second channel has constant
> read/write hangs, showing 100% load on few hundreds kBps in gstat.
>
> disk controller is Intel C204 PCH:
>
> ahci0: <Intel Cougar Point AHCI SATA controller> port
> 0xf050-0xf057,0xf040-0xf043,0xf030-0xf037,0xf020-0xf023,0xf000-0xf01f mem
> 0xfa901000-0xfa9017ff irq 19 at device 31.2 on pci0
> ahci0: attempting to allocate 1 MSI vectors (1 supported)
> msi: routing MSI IRQ 284 to local APIC 0 vector 81
> ahci0: using IRQ 284 for MSI
> ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported
> ahci0: Caps: 64bit NCQ SNTF ALP AL CLO 6Gbps PMD SSC PSC 32cmd EM 6ports
> ahci0: Caps2: APST
> ahci0: EM Caps: ALHD XMT SMB LED
> ahcich0: <AHCI channel> at channel 0 on ahci0
> ahcich0: Caps:
> ahcich1: <AHCI channel> at channel 1 on ahci0
> ahcich1: Caps:
>
> pass0 at ahcich0 bus 0 scbus0 target 0 lun 0
> pass0: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
> pass0: Serial Number WD-WCAYUFH26175
> pass0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> pass0: Command Queueing enabled
> pass1 at ahcich1 bus 0 scbus1 target 0 lun 0
> pass1: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
> pass1: Serial Number WD-WCAYUFH32290
> pass1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> pass1: Command Queueing enabled
> ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> ada0: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
> ada0: Serial Number WD-WCAYUFH26175
> ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> ada0: Command Queueing enabled
> ada0: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
> ada0: Previously was known as ad4
> ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
> GEOM: new disk ada0
> GEOM: new disk ada1
> ada1: <WDC WD5000AAKX-001CA0 15.01H15> ATA-8 SATA 3.x device
> ada1: Serial Number WD-WCAYUFH32290
> ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
> ada1: Command Queueing enabled
> ada1: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
> ada1: Previously was known as ad6
>
> Any hints?
>
>
> [1] http://www.supermicro.nl/products/system/3U/5037/SYS-5037MC-H8TRF.cfm

We have quite a few of these running 8.2-RELEASE-p6 on AHCI with no
problems (kernel compiled with:- device ahci)

ahci0: <Intel Cougar Point AHCI SATA controller> port 0xf050-0xf057,0xf040-0xf043,0xf030-0xf037,0xf020-0xf023,0xf000-0xf01f mem 
0xfbc01000-0xfbc017ff irq 19 at device 31.2 on pci0
ahci0: [ITHREAD]
ahci0: AHCI v1.30 with 6 6Gbps ports, Port Multiplier not supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich0: [ITHREAD]
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich1: [ITHREAD]

ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <WDC WD1003FBYX-01Y7B0 01.01V01> ATA-8 SATA 2.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
ada1: <Corsair Force 3 SSD 1.3> ATA-8 SATA 3.x device
ada1: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 57241MB (117231408 512 byte sectors: 16H 63S/T 16383C)

Given this might be worth seeing if 8.2 on AHCI fixes the
hangs and hence its a regression in 9. If your running
generic you should be able to just add the following to
/boot/loader.conf
ahci_load="YES"

    Regards
    Steve 


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