Would it help to use the iscsi backend instead of fibre channel? I figure that protocol should be able to deal with a certain amount of latency. -Chris -----Original Message----- From: Roland Dreier [mailto:roland@xxxxxxxxxxxxxxx] Sent: Monday, January 28, 2013 12:15 PM To: Holcombe, Christopher Cc: target-devel@xxxxxxxxxxxxxxx Subject: Re: Possible Bug in 3.8.0rc4 kernel On Mon, Jan 28, 2013 at 9:11 AM, Holcombe, Christopher <cholcomb@xxxxxxxxxxx> wrote: > Could latency in my ceph block device could cause this? I am not familiar with the lio code. When lio is writing to the block device I notice that ceph will delay writes sometimes if it is redistributing data due to an outage. Yes, if the backend is slow, then the initiator on FC might exceed its timeout and send an abort for the SCSI command that it considers timed out. Then processing the abort gets the LIO code onto this buggy code path. - R. ________________________________ NOTICE: This e-mail and any attachments is intended only for use by the addressee(s) named herein and may contain legally privileged, proprietary 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 email, and any attachments thereto, is strictly prohibited. If you receive this email in error please immediately notify me via reply email or at (800) 927-9800 and permanently delete the original copy and any copy of any e-mail, and any printout. -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
