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

[Chao-Rui Chang <ppc52776@xxxxxxxxx>]

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.
The following is the log message from xen 4.0 and 4.1-unstable:

xen 4.1-unstable + kernel 2.6.32.16:
      ->System can boot, but megasas fail after about 3-4 hours
     megasas: [ 0]waiting for 25 commands to complete
     megasas: [ 5]waiting for 25 commands to complete

     megasas: [10]waiting for 25 commands to complete
     megasas: [15]waiting for 25 commands to complete
     megasas: [20]waiting for 25 commands to complete
     megasas: [25]waiting for 25 commands to complete

                      ...
     megasas: cannot recover from previous reset failures
     end_request: I/O error, dev sda, sector 46755821
     Buffer I/O error on device dm-0, logical block 5818372
     lost page write due to I/O error on dm-0

     Buffer I/O error on device dm-0, logical block 5818373
                     ...
     end_request: I/O error, dev sda, sector 7024621
     Aborting journal on device dm-0.
     end_request: I/O error, dev sda, sector 7024653

                     ...
     ext4-fs error (device dm-0) in ext4_dirty_inode: Journal has aborted
     sd 0:2:0:0: rejecting I/O to offline device
     ext4_abort called.
     ext4-fs error (device dm-0): ext4_journal_start_sb: Detected aborted journal

     Remounting filesystem read-only
     end_request: I/O error, dev sda, sector 7024861
     end_request: I/O error, dev sda, sector 7024893
     ext4-fs error (device dm-0) in ext4_reserve_inode_write: Journal has aborted

     ext4-fs error (device dm-0) in ext4_reserve_inode_write: Journal has aborted
     end_request: I/O error, dev sda, sector 7024965
                   ...
     Buffer I/O error on device dm-0, logical block 1

     lost page write due to I/O error on dm-0
     sd 0:2:0:0: rejecting I/O to offline device
     sd 0:2:0:0: rejecting I/O to offline device
                   ...


xen 4.0-stable + kernel 2.6.32.16:


      ->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       BACKPLANE        1.07 PQ: 0 ANSI: 5
scsi 0:2:0:0: Direct-Access     DELL     PERC 6/i         1.22 PQ: 0 ANSI: 5

megasas: [ 0]waiting for 25 commands to complete
megasas: [ 5]waiting for 25 commands to complete
              ....

any idea about this problem?

Thanks.
-----------------------------------------------------

Best regards,
Chao-Rui
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