Re: SMP status ?

[Michael <macallan%netbsd.org@localhost>]

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Hello,

On Jan 10, 2011, at 5:47 AM, matthew green wrote:

> i'm curious if anyone else has success with the following change.  it
> has survived at least 3x longer than normal under load for me.
>
> thanks.
>
>
> Index: cpu.c
> ===================================================================
> RCS file: /cvsroot/src/sys/arch/sparc/sparc/cpu.c,v
> retrieving revision 1.223
> diff -p -r1.223 cpu.c
> *** cpu.c       22 Jun 2010 18:29:02 -0000      1.223
> --- cpu.c       10 Jan 2011 10:46:41 -0000
> *************** void
> *** 500,506 ****
>  cpu_init_system(void)
>  {
>
> !       mutex_init(&xpmsg_mutex, MUTEX_SPIN, IPL_VM);
>  }
>
>  /*
> --- 500,506 ----
>  cpu_init_system(void)
>  {
>
> !       mutex_init(&xpmsg_mutex, MUTEX_SPIN, IPL_SCHED);
>  }
>
>  /*

Doesn't seem to make a difference here ( 2x 125MHz HyperSPARC in an  
SS20 )
Something completely different though - now the dbri driver causes a  
locking-against-myself error when calling bus_dmamem_map() from  
dbri_malloc() when attaching audio - that used to work, even on MP  
kernels. THe panic doesn't happen on UP kernels and the panic is  
always on cpu1.

have fun
Michael

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