BERTRAND Joël wrote:
BERTRAND Joël wrote:
Bill Davidsen wrote:
Dan Williams wrote:
On Fri, 2007-10-19 at 01:04 -0700, BERTRAND Joël wrote:
I run for 12 hours some dd's (read and write in nullio)
between
initiator and target without any disconnection. Thus iSCSI code seems
to
be robust. Both initiator and target are alone on a single gigabit
ethernet link (without any switch). I'm investigating...
Can you reproduce on 2.6.22?
Also, I do not think this is the cause of your failure, but you have
CONFIG_DMA_ENGINE=y in your config. Setting this to 'n' will compile
out the unneeded checks for offload engines in async_memcpy and
async_xor.
Given that offload engines are far less tested code, I think this is
a very good thing to try!
I'm trying wihtout CONFIG_DMA_ENGINE=y. istd1 only uses 40% of one
CPU when I rebuild my raid1 array. 1% of this array was now
resynchronized without any hang.
Root gershwin:[/usr/scripts] > cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md7 : active raid1 sdi1[2] md_d0p1[0]
1464725632 blocks [2/1] [U_]
[>....................] recovery = 1.0% (15705536/1464725632)
finish=1103.9min speed=21875K/sec
Same result...
connection2:0: iscsi: detected conn error (1011)
session2: iscsi: session recovery timed out after 120 secs
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
sd 4:0:0:0: scsi: Device offlined - not ready after error recovery
Sorry for this last mail. I have found another mistake, but I don't
know if this bug comes from iscsi-target or raid5 itself. iSCSI target
is disconnected because istd1 and md_d0_raid5 kernel threads use 100% of
CPU each !
Tasks: 235 total, 6 running, 227 sleeping, 0 stopped, 2 zombie
Cpu(s): 0.1%us, 12.5%sy, 0.0%ni, 87.4%id, 0.0%wa, 0.0%hi, 0.0%si,
0.0%st
Mem: 4139032k total, 218424k used, 3920608k free, 10136k buffers
Swap: 7815536k total, 0k used, 7815536k free, 64808k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5824 root 15 -5 0 0 0 R 100 0.0 10:34.25 istd1
5599 root 15 -5 0 0 0 R 100 0.0 7:25.43
md_d0_raid5
Regards,
JKB
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