[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:
ÂÂÂÂÂ ->System can boot, but megasas fail after about 3-4 hours
ÂÂÂÂ megasas: [ 0]waiting for 25 commands to complete
ÂÂÂÂ megasas: [ 5]waiting for 25 commands to complete

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

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

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

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

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

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

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


xen 4.0-stable + kernel 2.6.32.16:


ÂÂÂÂÂ ->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-AccessÂÂÂÂ ATAÂÂÂÂÂ WDC WD1002FBYS-1 0C10 PQ: 0 ANSI: 5
scsi 0:0:1:0: Direct-AccessÂÂÂÂ ATAÂÂÂÂÂ WDC WD1002FBYS-1 0C10 PQ: 0 ANSI: 5

scsi 0:0:2:0: Direct-AccessÂÂÂÂ ATAÂÂÂÂÂ WDC WD1002FBYS-1 0C10 PQ: 0 ANSI: 5
scsi 0:0:32:0: EnclosureÂÂÂÂÂÂÂÂ DPÂÂÂÂÂÂ BACKPLANEÂÂÂÂÂÂÂ 1.07 PQ: 0 ANSI: 5
scsi 0:2:0:0: Direct-AccessÂÂÂÂ DELLÂÂÂÂ PERC 6/iÂÂÂÂÂÂÂÂ 1.22 PQ: 0 ANSI: 5

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

any idea about this problem?

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

Best regards,
Chao-Rui
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