what is lpfc_do_dpc_0?

[Ed Wilts]

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=off&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