Re: /var/log/messages and some errors

[Rick Stevens <rstevens vitalstream com>]

Waldher, Travis R wrote:
> > -----Original Message-----
> > From: Rick Stevens [mailto:rstevens vitalstream com] 
> > Sent: Monday, September 29, 2003 1:02 PM
> > To: redhat-install-list redhat com
> > Subject: Re: /var/log/messages and some errors
> >
> >
> > Waldher, Travis R wrote:
> >
> > > I did a search, a LOT of people asked this question, according to 
> > > google, no one has ever answered it.
> > >
> > > What is this error I am getting and how do I get rid of it?
> > >
> > > Sep 26 10:43:52 cfs3 kernel: mtrr: Serverworks LE detected. 
> > > Write-combining disabled. Sep 26 10:43:52 cfs3 kernel: mtrr: your 
> > > processor doesn't support write-combining
> >
> > Write-combining is a mechanism whereby the processor collects 
> > a number of writes to its cache into a batch and does the 
> > write to non-cache RAM at one time, rather than doing the 
> > write-throughs one at a time. If you're really compute bound, 
> > this can help performance.  For the vast majority of people, 
> > it makes no difference.
>
>
> Is there anyway to get it turned off?  It's producing quiet a few errors
> in the messagse file.

You can delete /proc/mtrr or look at that file and figure out which one
of the entries is causing problems and delete that entry only.

Details are in /usr/src/linux/Documentation/mtrr.txt

> > > While I am here... What is this one too?
> > >
> > > Sep 26 10:43:30 cfs3 modprobe: modprobe: Can't locate module 
> > > block-major-105 Sep 26 10:43:30 cfs3 modprobe: modprobe: 
> >
> > Can't locate 
> >
> > > module block-major-106
> > > Sep 26 10:43:30 cfs3 modprobe: modprobe: Can't locate module
> > > block-major-107
> > > Sep 26 10:43:30 cfs3 modprobe: modprobe: Can't locate module
> > > block-major-108
> > > Sep 26 10:43:30 cfs3 modprobe: modprobe: Can't locate module
> > > block-major-109
> > > Sep 26 10:43:30 cfs3 modprobe: modprobe: Can't locate module
> > > block-major-110
> > > Sep 26 10:43:30 cfs3 modprobe: modprobe: Can't locate module
> > > block-major-111
> >
> > Is this a Compaq, by any chance?  If so, those are the block 
> > major numbers for the second through eighth Compaq Next 
> > Generation Drive Array controller.
> >
> >
> > > (there are a LOT more of those, with different numbers as well.)
> >
> > Block (and character) major numbers are in the kernel source 
> > code documents (by default, /usr/src/linux/Documentation/devices.txt).
>
>
> Yes, it's a compaq.
>
> Here is the errors I get with block mode:
>
>
> Sep 24 06:51:59 cfs3 modprobe: modprobe: Can't locate module
> block-major-105
> Sep 24 06:51:59 cfs3 modprobe: modprobe: Can't locate module
> block-major-106
> Sep 24 06:51:59 cfs3 modprobe: modprobe: Can't locate module
> block-major-107
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-108
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-109
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-110
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-111
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-72
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-73
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-74
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-75
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-76
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-77
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-78
> Sep 24 06:52:00 cfs3 modprobe: modprobe: Can't locate module
> block-major-79
>
> That set of numbers keeps repeating.
>
> Looking through that file I found entries for it, but what does it mean?

You don't have more than one array controller, so you 'll get those
errors for 105 through 111 and 72 through 79.

What does your modules.conf file say?  You may have to "MAKEDEV ida"
and "MAKEDEV cciss" to get rid of the messages.
----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens vitalstream com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-         "The Schizophrenic: An Unauthorized Autobiography"         -
----------------------------------------------------------------------