From: Ming Z. <bla...@gm...> - 2007-10-30 17:44:54
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On Tue, 2007-10-30 at 13:34 -0400, Chris Siebenmann wrote: > I have a wierd lockup situation that I am hoping people can help > tell me how to diagnose and fix. Here is the situation: > > The target is Red Hat Enterprise 5 x86_64 running current SVN > iscsi-target (although I believe I've seen this with 0.4.15); the > exported disks are LVM volumes on top of an 11-disk software RAID-6. rhel kernel or customized kernel? > > The initiator is 64-bit Solaris 10 x86 (currently S10U4, but we have > seen this on S10U3 as well), running Solaris Volume Manager (with a > ufs filesystem on top of it). > > If I configure the exported LUNs as 'Type=fileio', everything works OK > but the (streaming IO) performance is not very good to terrible. > > If I configure the exported LUNs as 'Type=blockio', the Solaris machine > does something that eventually wedges iSCSI processing on the target. > The system doesn't crash but it stops answering iSCSI stuff, and things > like '/etc/init.d/iscsi-target stop' hang. how long it takes to lock the iet? under heavy io? > > The Solaris machine is fine with blockio LUNs for ZFS and UFS > filesystems directly on the exported LUNs; only when Solaris Volume > Manager gets into the picture do things explode. > > I have SysRq-T output from the target system if there is something I > should look for (or I can send the whole thing to the mailing list or > specific people). I would be happy to run debugging code, poke things, > and so on, as these are test systems. post it here. dmesg -n7, see anything from log suspicious before iet hangs. > > Thanks in advance. > > - cks > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Iscsitarget-devel mailing list > Isc...@li... > https://lists.sourceforge.net/lists/listinfo/iscsitarget-devel -- Ming Zhang @#$%^ purging memory... (*!% http://blackmagic02881.wordpress.com/ http://www.linkedin.com/in/blackmagic02881 -------------------------------------------- |