Re: port-i386/42966: kernel built from today's netbsd-5 crashes

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR port-i386/42966; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: Anne Bennett <anne%porcupine.montreal.qc.ca@localhost>, 
        matthew green <mrg%eterna.com.au@localhost>
Cc: port-i386-maintainer%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost, 
        netbsd-bugs%netbsd.org@localhost, gnats-bugs%netbsd.org@localhost, 
        "David H. Gutteridge" <dhgutteridge%sympatico.ca@localhost>
Subject: Re: port-i386/42966: kernel built from today's netbsd-5 crashes
Date: Thu, 18 Mar 2010 08:40:14 -0400

 On Mar 17, 11:40pm, anne%porcupine.montreal.qc.ca@localhost (Anne Bennett) 
wrote:
 -- Subject: Re: port-i386/42966: kernel built from today's netbsd-5 crashes
 
 | 
 | Matthew,
 | 
 | Thanks for looking into this.
 | 
 | > it comes from this call in i915_dma.c:
 | > 
 | >    drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);
 | > 
 | > and the final argument is passed as the boundary.  notice how it is
 | > not a power of two?  it really wants to be 0x1.0000.0000.
 | > 
 | > anne, david, can one of you try changing this to 0?  or if you have
 | > 2GB of ram or less, try 0x80000000...
 | 
 | Kernel says:
 |   total memory = 2038 MB
 |   avail memory = 1991 MB
 | 
 | Any preference as to whether I try 0x80000000 or 0x0 (to replace
 | 0xffffffff, I assume)?  Which one are you hoping to patch to in
 | the end?
 | 
 | Meanwhile, I have two files "i915_dma.c" with different contents:
 |    (1) /usr/src/sys/dev/pci/drm/i915_dma.c
 |    (2) /usr/src/sys/external/bsd/drm/dist/shared-core/i915_dma.c
 
 See revision 1.2 of that file which explains what is going on. Drochner backed
 it out for some reason...
 
 christos