RE: SRPT and SCST

["Arend Dittmer" <adittmer-pabcTyWEv4ZW60MLeMDbCVaTQe2KTcn/@public.gmane.org>]

To Bart's earlier question  ... we apologize for not being able to come up with a time and date when the initiators lost contact with the target. We have not been able to test with an initiator from a vanilla kernel. We only tested with the initiator that ships with RedHat 5.3. We built the module against a slightly modified RedHat kernel that includes process management patches that allow for a unified process space for our cluster management software Scyld clusterware. Our patches do not affect any storage components. 

[root@head0 ~]# bpsh 1 modinfo ib_srp
filename:       /lib/modules/2.6.18-128.1.1.el5.530g0000/kernel/drivers/infiniband/ulp/srp/ib_srp.ko

license:        Dual BSD/GPL
description:    InfiniBand SCSI RDMA Protocol initiator v0.2 (November 1, 2005)
author:         Roland Dreier
srcversion:     23B2629641E1A475BF72F44
depends:        ib_core,scsi_mod,ib_cm,ib_sa
vermagic:       2.6.18-128.1.1.el5.530g0000 SMP mod_unload gcc-4.1
parm:           srp_sg_tablesize:Max number of gather/scatter entries per I/O (default is 12) (int)
parm:           topspin_workarounds:Enable workarounds for Topspin/Cisco SRP target bugs if != 0 (in
t)
parm:           mellanox_workarounds:Enable workarounds for Mellanox SRP target bugs if != 0 (int)
parm:           srp_dev_loss_tmo:Default number of seconds that srp transport should              in
sulate the lost of a remote port (default is 60 secs (int)
module_sig:     883f35049c0555e56ccec1c0ba19c3112f87b09e2872185017b618b6026be92291a62b5446018e009d1e
3299cd274ad8e31c3d0b03081b112959d4d84

Also ... we ran with only a single thread.

Thanks

Arend     


-----Original Message-----
From: Chris Worley [mailto:worleys-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]
Sent: Mon 11/9/2009 3:43 PM
To: Vladislav Bolkhovitin
Cc: Bart Van Assche; Arend Dittmer; Philip Pokorny; scst-devel-5NWGOfrQmnc@public.gmane.orgurceforge.net; linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Vu Pham
Subject: Re: SRPT and SCST
 
On Mon, Nov 9, 2009 at 1:26 PM, Vladislav Bolkhovitin <vst-d+Crzxg7Rs0@public.gmane.org> wrote:
> Bart Van Assche, on 11/08/2009 12:49 PM wrote:
>>
>> On Fri, Nov 6, 2009 at 6:28 PM, Arend Dittmer
>> <adittmer-pabcTyWEv4ZW60MLeMDbCVaTQe2KTcn/@public.gmane.org> wrote:
>>>
>>> Please find attached the gzip'ed /var/log/messages.
>>
>> This log clearly show the login and logout actions from the different
>> initiators. I couldn't find anything unusual in the posted log file
>> however. Around which time did the initiator start complaining about
>> aborted SCSI commands ? Does this issue also happen when using the SRP
>> initiator included in a vanilla (non-OFED) Linux kernel ?
>
> It looks painfully similar to what Chris Worley experienced some time ago
> and somehow fixed/workarounded.
>
> Chris, can you comment on this?

The "thread=1" fixed the problem mostly, but I am working with another
group that says they still get an abort, but haven't gotten around to
providing me with the info I need to look at it.

Chris
>
>> Bart.
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