what is lpfc_do_dpc_0?

[Ed Wilts]

On Wed, Nov 16, 2005 at 03:30:46PM +0200, Tolga Evren wrote:
> Hi Ed ,
> 
> How can i check the driver versions?

I usually do a strings on the actual driver in a see what it reports.
Does RHEL 2.1 include the driver you're using or did you download one
from Emulex's web site?  

Don't forget to check the firmware version.  That's usually more out of
the date than the drivers in my experience.  Emulex has a tool to check
the firmware version and sometimes it's reported when the HBA logs into
the fabric.  Check the messages file for right after the system booted
to see if it's in there.  If your HBA is an original from when RHEL 2.1
came out, it's probably an LP8000-E - they were popular back then.  The
firmware for those cards has been updated a fair bit over the years.

You may want to log a call with EMC on this.  In my previous experience
(we're not an EMC shop any more), their support has been pretty good and
they can tell you how to work through these issues.

        .../Ed

> -----Original Message-----
> From: redhat-list-bounces at redhat.com
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Ed Wilts
> Sent: Wednesday, November 16, 2005 2:38 PM
> To: General Red Hat Linux discussion list
> Subject: Re: what is lpfc_do_dpc_0?
> 
> On Wed, Nov 16, 2005 at 08:41:46AM +0200, Tolga Evren wrote:
> > Thanks for your responses. Yes my system is connected to the emc
> storage
> > . I use emulex HBA . I have checked the messages file , there exists
> > following messages:
> > 
> > Nov 13 20:39:47 tanidw1 kernel: !lpfc0:0410:INe:Cannot find virtual
> addr
> > for mapped buf on ring 0 Data x411ACC00 x x
> > Nov 13 20:48:19 tanidw1 kernel: !lpfc0:0410:INe:Cannot find virtual
> addr
> > for mapped buf on ring 0 Data x411AC800 x x
> > Nov 13 20:57:11 tanidw1 kernel: !lpfc0:0410:INe:Cannot find virtual
> addr
> > for mapped buf on ring 0 Data x411AC400 x x
> > Nov 13 21:04:54 tanidw1 kernel: !lpfc0:0410:INe:Cannot find virtual
> addr
> > for mapped buf on ring 0 Data x411AC000 x x
> > 
> > Do these messages indicate a problem?
> 
> >From a quick Google search, these do indicate a problem.
> http://www.google.com/search?num=50&hl=en&lr=lang_en&newwindow=1&safe=of
> f&c2coff=1&q=lpfc+%22Cannot+find+virtual+addr+for+mapped+buf+on+ring%22&
> btnG=Search
> 
> The Emulex docs (one of the first results from Google) say:
> 
> 0410 INe message: Cannot find virtual addr for mapped buf on ring <num>
> 
> DESCRIPTION: The driver cannot find the specified buffer in its mapping
> table. Thus it cannot find the virtual address needed to access the
> data.
> 
> DATA: (1) mapbp (2) fc_mpoff (3) fc_mpon
> 
> SEVERITY: error
> 
> LOG: always
> 
> MODULE: fcmemb.c
> 
> ACTION: This error could indicate a software driver or firmware problem.
> If the problem persists, report the error to Technical Support.
> 
> 
> I did ask in my earlier note if your drivers and firmware were current.
> Have you double-checked this?
> 
>         .../Ed
> 
> 
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com
> > [mailto:redhat-list-bounces at redhat.com] On Behalf Of Ed Wilts
> > Sent: Friday, November 11, 2005 2:34 AM
> > To: General Red Hat Linux discussion list
> > Subject: Re: what is lpfc_do_dpc_0?
> > 
> > On Thu, Nov 10, 2005 at 05:47:50PM +0200, Tolga Evren wrote:
> > > This is redhat 2.1 .
> > > 
> > > I see this process in top consuming cpu. What does this do?
> > 
> > lpfc might be related to an Emulex LP fibre adapter.  Are you SAN
> > connected?  RHEL 2.1 is fairly old but you might see if your fibre
> > drivers and firmware are current.  Also, check for any lpfc-related
> > events in /var/log/messages
> > 
> >         .../Ed

-- 
Ed Wilts, RHCE
Mounds View, MN, USA
mailto:ewilts at ewilts.org
Member #1, Red Hat Community Ambassador Program