BERTRAND Joël wrote: > > Ross S. W. Walker wrote: > > 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 > > > > I am unsure why you would want to setup an iSCSI RAID1, but before > > doing so I would try to verify that each independant iSCSI session > > is bullet proof. > > I use one and only one iSCSI session. Raid1 array is > built between a > local and iSCSI volume. Oh, in that case you will be much better served with DRBD, which would provide you with what you want without creating a Frankenstein setup... -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
