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List:       linux-mips-kernel
Subject:    Re: [Linux-mips-kernel]couple of problems with my VR4181
From:       Jun Sun <jsun () mvista ! com>
Date:       2002-07-03 21:59:35
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Did you check out the oss CVS tree?  Last time when I checked it was fine. 
Otherwise, check out sf tree around the beginning of the year.  osprey 
definitely worked then.  I have not touched this board for quite a while.

Jun

Steven Seeger wrote:

> Hey all. I have an NEC Osprey board here that I have successfully got
> 2.4.0-test9 from the Linux-VR project up and running on plus RTAI and a few
> other goodies. I'd like to get your 2.4.18 kernel going but am running into
> some problems. I checked out your tree a few months ago and have that kernel
> booting fine. The only problem with it is that it seems the kernel doesn't
> like to deallocate memory. I made a module that kmallocs about 10 megs worth
> of stuff, and then kfrees it when you rmmod it. The memory usage is still
> there, and user tasks will page fault if they take up too much memory. The
> same is true for the dentry cache. It fills up when I cat large files to
> /dev/null but never frees.
> 
> So, I got the latest sources (much different than what I had..the stuff I
> had before had everything in arch/mips/vr4181 but now there's a vr41xx
> subdir and an icu.c file if that gives you an idea of how old of sources I
> was working with) and it exhibits some real weird behavior.
> 
> Nothing prints on the serial console unless the kernel either panics (no
> root setup yet) or I put in a line somewhere like while(1) *(volatile
> unsigned char*)0xb7ffffd0 = blah++; On the Osprey, that address sets the
> output of a parallel port that I can look at on a scope. If I put that line
> in, the serial text prints fine. Putting a while(1); in the same spot will
> print nothing. Stubbing in 10 of those lines puts nothing on the scope.
> 
> On the latest kernel, I had to manually turn on the bit in
> VR41XX_MSYSINT1REG to enable the RTC1L irq. I didn't have to put that in on
> the old sources.
> 
> If anybody can offer some advice I'd appreciate it. I have no emulator for
> this board so my only debug options are printks and the parallel port. That
> sucks a lot because they're both acting up with this one. :)
> 
> Steve
> 
> 
> 
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