Re: Kernel panic on amd64Netbsd 4.0

Manuel Bouyer <[email protected]> Thu, 25 Sep 2008 20:59:05 +0200

Newsgroups	gmane.os.netbsd.ports.x86-64,gmane.os.netbsd.general,gmane.os.netbsd.help
Message-ID	<[email protected]>

On Wed, Sep 24, 2008 at 05:41:47PM -0400, Derrick Lobo wrote:
> 
> 
> I get the following error once in a while, 
> 
> 
> ahd0:failed to create DMA map for SC data structure, error = 12
> ahd_createdmamem error (2)

12 is ENOMEM. I wonder if it's work better with only 3GB of ram, to avoid
bounce buffers ...


> ahd0:failed to create DMA map for Sense data structure, error = 12
> ahd_createdmamem error (2)
> ahd0:failed to create DMA map for hardware SCB data structure, error = 12
> ahd_createdmamem error (2)
> uvm_fault(0xffffffff80ab3580, 0xffff800058f80000, 2) -> e
> kernel: page fault trap, code=0
> Stopped in pid 9,1 (scsibus0) at   netbsd:ahd_alloc_scbs+0x1ed: repe st
> sq  %es:(%rdi)
> db>

At first look, the ahd error handling looks buggy. It doesn't even try to
cleanup/free what is has already allocated when failing ...

-- 
Manuel Bouyer <[email protected]>
     NetBSD: 26 ans d'experience feront toujours la difference
--