RE: [meteor2mc-devel] xawtv symptoms

[Spencer E. O. <ol...@um...>]

I've been working without the bigphysarea patch.  I also figured out a
few bugs in the driver and fixed a number of them.  I am currently going
through the code and trying to make it SMP safe.  Though I have a single
CPU system, I like to use the preempt patch from Robert Love, so our
code needs to be SMP safe.  For the most part xawtv works just fine
now.  There only seems to be one problem that is probably related to a
race condition in the driver that needs to be protected against.

The stream_buf[2123] kalloc'ation was attempted because I have been
forced to use mem=800M to load the meteor2mc driver.  It failed because
kmalloc cannot allocate more than 1<<17 bytes at a time.  I'll send more
detailed notes about this later.

I fixed this by adding 2 different methods of limiting the number of
stream_bufs that can be kalloc'ated at a time.

More details later,

Spencer



Give me a day or two and I'll send you a 'cvs diff -u' patch.

On Fri, 2004-04-30 at 05:23,
"Marcus Furlong" <fur...@ho...> wrote:
> Just had a real quick look at this, will check more tomorrow...
> 
> >kernel with all the appropriate patches last night.  (I'm currently
> >running 2.4.24 and will just compiled 2.4.26 w/ kdb).
> 
> Is this with the bigphysarea patch?
> 
> >From your logs...
> 
> pr 27 18:54:19 cw-bec kernel: meteor2mc [via_setup_himem_bufs]: buffer 
> size/num changed (110592->110592/0->1)
> Apr 27 18:54:19 cw-bec kernel: meteor2mc [via_setup_himem_bufs]: stream_buf 
> == NULL
> Apr 27 18:54:19 cw-bec kernel: meteor2mc [via_setup_himem_bufs]: 
> kmalloc(stream_buf[2123]) failed
> 
> On the website I noted that using bigphysarea is currently broken here. It 
> was last tested working with 2.4.20, can you try with that? Or else try 
> without bigphysarea.
> 
> Marcus.
> 
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------------
Spencer Olson
Department of Physics
University of Michigan
Spe...@um...
tel: 734-647-9030
tel: 734-763-2544
fax: 734-764-5153

Common sense and a sense of humor are the same thing, moving at
different speeds. A sense of humor is just common sense, dancing.
-- Clive James