Re: kern/51037

["Aaron J. Grier" <agrier%poofygoof.com@localhost>]

The following reply was made to PR kern/51037; it has been noted by GNATS.

From: "Aaron J. Grier" <agrier%poofygoof.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/51037
Date: Mon, 11 Apr 2016 22:03:26 -0700

 a tcpdump reveals the problem:
 http://poofygoof.com/~agrier/attic/iscsifail.cap.bz2
 
 NetBSD iSCSI initiator is attempting to initiate two writes
 concurrently, but FreeBSD iSCSI target apparently does not support
 overlapped commands.
 
 this seems more of a problem with FreeBSD, (and I will follow-up there,)
 but is there any way I can configure NetBSD to play nice in the
 meantime?  (I would think FreeBSD would want to allow concurrent
 commands to allow pipelining...)
 
 as a wild guess, I tried disabling write-back cache on the iscsi sd
 device with scsictl, but that didn't change the observed behavior.
 
 -- 
   Aaron J. Grier | "Not your ordinary poofy goof." | agrier%poofygoof.com@localhost