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Message-ID: <86802c4405080411013b60382c@mail.gmail.com>
Date: Thu, 4 Aug 2005 11:01:55 -0700
From: yhlu <yhlu.kernel@gmail.com>
Reply-To: yhlu <yhlu.kernel@gmail.com>
To: Roland Dreier <rolandd@cisco.com>
Subject: Re: mthca and LinuxBIOS
Cc: linux-kernel@vger.kernel.org, openib-general@openib.org
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i enable CCONFIG_INFINIBAND_MTHCA_DEBUG=y

I didn't get any more debug info, is that depend other setting?

YH

On 8/4/05, yhlu <yhlu.kernel@gmail.com> wrote:
> The mellanox can use prefmem64, but the BIOS could only allocate the
> some range below 4G, So 32 bit OS still can use the IB cards.
> but for 64bit OS, We could allocate range above 4G (0xfc00000000), So
> the mmio below 4G can be smaller. ( for example from 512M to 128M, the
> user can get back some RAM back if Opteron don't have hardware memhole
> support).
> 
> YH
> 
> 
> 
> On 8/4/05, Roland Dreier <rolandd@cisco.com> wrote:
> > >>>>> "yhlu" == yhlu  <yhlu.kernel@gmail.com> writes:
> >
> >     yhlu> YES.  I will send you the output message later about
> >     yhlu> "CONFIG_INFINIBAND_MTHCA_DEBUG=y"
> >
> > Thanks.  In the meantime, can you explain what it means to "enable the
> > prefmem64 to use real 64 range"?  What is the difference between this
> > and the configuration that works?
> >
> >  - R.
> >
>