Re: Ugly BETA5 crashes, VM fault (with trace)

Am Mittwoch, 12. Oktober 2005 16:34 CEST schrieb Robert Watson:
> On Wed, 12 Oct 2005, Emanuel Strobl wrote:
> > my desktop box crashed for severla weeks every few days and since
> > beta5 was withoug kdb I had to rebuild a debugging kernel to get this
> > recorded (no dump was written, so nothing in /var/crash) Like
> > mentioned, I see the crash every view days, I think when having
> > simultaniously NFS and local disk load. Please tell me if I can
> > provide more info!
>
> I take it you have zero-copy sockets enabled?  Do the panics happen if
> you don't have it enabled?

Yes, you are right, I have zero-copy sockets enabled (I don't have decent 
HW so I tried to gain as much as possible options I don't really 
understand... :()
I'll rebuild a debug kernel without zero_copy_sockets and see if it happens 
again, but as I wrote the crash happens only every few days, possibly not 
within the next whole week...
But I'll remove it and keep you informed...

Thanks,

-Harry

>
> Robert N M Watson
>
> > -Harry
> >
> > Fatal trap 12: page fault while in kernel mode
> > fault virtual address   = 0x5a
> > fault code              = supervisor read, page not present
> > instruction pointer     = 0x20:0xc06ec5a9
> > stack pointer           = 0x28:0xdad2c99c
> > frame pointer           = 0x28:0xdad2ca88
> > code segment            = base 0x0, limit 0xfffff, type 0x1b
> >                        = DPL 0, pres 1, def32 1, gran 1
> > processor eflags        = interrupt enabled, resume, IOPL = 0
> > current process         = 741 (kdeinit)
> > [thread pid 741 tid 100102 ]
> > Stopped at      vm_fault+0x239: cmpw    $0,0x5a(%eax)
> > db> trace
> > Tracing pid 741 tid 100102 td 0xc2470a80
> > vm_fault(c1443000,c144f000,2,0,c2470a80) at vm_fault+0x239
> > trap_pfault(dad2cb14,0,c144fff4,dad2cae8,c144fff4) at
> > trap_pfault+0x156 trap(c0790008,28,c0850028,dad2ccb4,2000) at
> > trap+0x38e
> > calltrap() at calltrap+0x5
> > --- trap 0xc, eip = 0xc06fd0ce, esp = 0xdad2cb54, ebp = 0xdad2cb68 ---
> > vm_page_cowsetup(c144ffb8,0,c079615b,82,dad2cbf4) at
> > vm_page_cowsetup+0x2e socow_setup(c1ef2300,dad2ccb4,2,2c4,1) at
> > socow_setup+0x98
> > sosend(c29f4858,0,dad2ccb4,0,0) at sosend+0x56b
> > soo_write(c284d090,dad2ccb4,c26f5980,0,c2470a80) at soo_write+0x87
> > dofilewrite(c2470a80,f,c284d090,dad2ccb4,ffffffff) at dofilewrite+0x85
> > kern_writev(c2470a80,f,dad2ccb4,8100ff4,de10) at kern_writev+0x65
> > write(c2470a80,dad2cd04,c,422,3) at write+0x4f
> > syscall(805003b,3b,bfbf003b,805c000,f) at syscall+0x2c0
> > Xint0x80_syscall() at Xint0x80_syscall+0x1f
> > --- syscall (4, FreeBSD ELF32, write), eip = 0x293791ab, esp =
> > 0xbfbfe15c, ebp =
> > 0xbfbfe178 ---
> > db>
>