Re: [Xen-users] xen-4 + megasas(DELL 6i RAID) = Reject I/O to offline device

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Jul 20, 2010 at 03:27:19PM +0800, Chao-Rui Chang wrote:
>    Dear folks,
> 
>    I have problem with xen-4 + megasas driver (dell raid card 6i).
>    The raid controller goes offline randomly.
> 
>    This may be the xen hypervisor problem.
>

I don't think it's a problem with Xen hypervisor.
It's more probably a problem with the dom0 kernel.

Does the same kernel work OK when it's booted on native baremetal (without Xen) 
?

-- Pasi

>    The following is the log message from xen 4.0 and 4.1-unstable:
> 
>    xen 4.1-unstable + kernel [1]2.6.32.16:
>    Â Â Â Â Â  ->System can boot, but megasas fail after about 3-4 hours
>    Â Â Â Â  megasas: [ 0]waiting for 25 commands to complete
>    Â Â Â Â  megasas: [ 5]waiting for 25 commands to complete
>    Â Â Â Â  megasas: [10]waiting for 25 commands to complete
>    Â Â Â Â  megasas: [15]waiting for 25 commands to complete
>    Â Â Â Â  megasas: [20]waiting for 25 commands to complete
>    Â Â Â Â  megasas: [25]waiting for 25 commands to complete
>    Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  ...
>    Â Â Â Â  megasas: cannot recover from previous reset failures
>    Â Â Â Â  end_request: I/O error, dev sda, sector 46755821
>    Â Â Â Â  Buffer I/O error on device dm-0, logical block 5818372
>    Â Â Â Â  lost page write due to I/O error on dm-0
>    Â Â Â Â  Buffer I/O error on device dm-0, logical block 5818373
>    Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  ...
>    Â Â Â Â  end_request: I/O error, dev sda, sector 7024621
>    Â Â Â Â  Aborting journal on device dm-0.
>    Â Â Â Â  end_request: I/O error, dev sda, sector 7024653
>    Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  ...
>    Â Â Â Â  ext4-fs error (device dm-0) in ext4_dirty_inode: Journal has
>    aborted
>    Â Â Â Â  sd 0:2:0:0: rejecting I/O to offline device
>    Â Â Â Â  ext4_abort called.
>    Â Â Â Â  ext4-fs error (device dm-0): ext4_journal_start_sb: Detected
>    aborted journal
>    Â Â Â Â  Remounting filesystem read-only
>    Â Â Â Â  end_request: I/O error, dev sda, sector 7024861
>    Â Â Â Â  end_request: I/O error, dev sda, sector 7024893
>    Â Â Â Â  ext4-fs error (device dm-0) in ext4_reserve_inode_write: Journal
>    has aborted
>    Â Â Â Â  ext4-fs error (device dm-0) in ext4_reserve_inode_write: Journal
>    has aborted
>    Â Â Â Â  end_request: I/O error, dev sda, sector 7024965
>    Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  ...
>    Â Â Â Â  Buffer I/O error on device dm-0, logical block 1
>    Â Â Â Â  lost page write due to I/O error on dm-0
>    Â Â Â Â  sd 0:2:0:0: rejecting I/O to offline device
>    Â Â Â Â  sd 0:2:0:0: rejecting I/O to offline device
>    Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  ...
> 
>    xen 4.0-stable + kernel [2]2.6.32.16:
>    Â Â Â Â Â  ->System can not boot, megasas fail at boot time
>    xen: registering gsi 33 triggering 0 polarity 1
>    xen: --> irq=33
>    megaraid_sas 0000:03:00.0: PCI INT A -> GSI 33 (level, low) -> IRQ 33
>    megaraid_sas 0000:03:00.0: setting latency timer to 64
>    megasas: FW now in Ready state
>    scsi0 : LSI SAS based MegaRAID driver
>    scsi 0:0:0:0: Direct-Access     ATA      WDC WD1002FBYS-1 0C10
>    PQ: 0 ANSI: 5
>    scsi 0:0:1:0: Direct-Access     ATA      WDC WD1002FBYS-1 0C10
>    PQ: 0 ANSI: 5
>    scsi 0:0:2:0: Direct-Access     ATA      WDC WD1002FBYS-1 0C10
>    PQ: 0 ANSI: 5
>    scsi 0:0:32:0: Enclosure         DP     Â
>    BACKPLANEÂ Â Â Â Â Â Â  1.07 PQ: 0 ANSI: 5
>    scsi 0:2:0:0: Direct-Access     DELL     PERC 6/i       Â
>    1.22 PQ: 0 ANSI: 5
>    megasas: [ 0]waiting for 25 commands to complete
>    megasas: [ 5]waiting for 25 commands to complete
>    Â Â Â Â Â Â Â Â Â Â Â Â Â  ....
> 
>    any idea about this problem?
> 
>    Thanks.
>    -----------------------------------------------------
>    Best regards,
>    Chao-Rui
> 
> References
> 
>    Visible links
>    1. http://2.6.32.16/
>    2. http://2.6.32.16/

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