Re: amd64 panics w/XEN_DOM0, not GENERIC

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On 20 Aug 2008, at 14:55, Todd Kover wrote:
> I slowly paired things down so I was not running any xen daemons and
> consequently, no domUs, and had eventually dedicated all of the 4gb
> of memory to dom0.

Which is probably the cause of your problem.

> RECENT CRASH:
> uvm_fault(0xffffffff80b24e80, 0xffffffff81400000, 1) -> e
> fatal page fault in supervisor mode
> trap type 6 code 0 rip ffffffff804bd443 cs e030 rflags 10282 cr2   
> ffffffff81
> 400140 cpl 0 rsp ffffa0004fb108d0
> kernel: page fault trap, code=0
> Stopped in pid 850.1 (chunker) at       netbsd:pmap_kenter_pa 
> +0x173:    movq 0
> (%rax),%rsi
> pmap_kenter_pa() at netbsd:pmap_kenter_pa+0x173
> ubc_alloc() at netbsd:ubc_alloc+0x25d
> ubc_uiomove() at netbsd:ubc_uiomove+0xba
> ffs_write() at netbsd:ffs_write+0x684
> VOP_WRITE() at netbsd:VOP_WRITE+0x2d
> vn_write() at netbsd:vn_write+0xce
> dofilewrite() at netbsd:dofilewrite+0x7f
> sys_write() at netbsd:sys_write+0x72
> syscall() at netbsd:syscall+0x98

That looks exactly like the stack trace I reported in PR port-xen/38699.

        Kind regards

--
Matthias Scheler                           http://zhadum.org.uk/