Re: Most programs crash under openmosix.

Hi,

I also use Gentoo and have tried a few of the openMosix kernels within
Gentoo portage.

I am unsure of their current state but have always found them to be unstable
due to the amount of patches included with them (migshm and many others).

The official openMosix kernel is 2.4.26 and thus, I always build my own and
ignore the Gentoo ones all together.

Martin



On 15/03/06, Gert Burger <[email protected]> wrote:
>
> Hi
>
> We run a smallish(18 pc) cluster for AI smulations. At least we are
> trying to.
>
> The processes migrate properly but openmosixtest packages and almost all
> of our simulations crash after only a few seconds with a kernel oops.
> Below is the oops.
>
> We are running openmosix 2.4.30 and openmosix-user 0.3.6-r3 from the
> gentoo portage.
>
> Any ideas anyone?
>
> The openmosixtests freeze the machine within 5-10 seconds.
>
> Oops from our program:
> <1>Unable to handle kernel NULL pointer dereference at virtual address
> 0000004c
> c0172b9d
> *pde = 00000000
> Oops: 0002
> CPU:    0
> EIP:    0010:[<c0172b9d>]    Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010286
> eax: 00000000   ebx: ce7c4720   ecx: 0805672c   edx: 00000000
> esi: 08057000   edi: 08057000   ebp: 00000000   esp: cdfe1b2c
> ds: 0018   es: 0018   ss: 0018
> Process ls (pid: 1659, stackpage=cdfe1000)
> Stack: cdfe1b30 ce7c4660 ce7c4720 00000000 00000009 c017510d 08056380
> 0805672c
> 00000380 00000003 00001812 0000000e c041f8f0 fffffffb 00000000 00000246
> c041f8f0 00000246 00000002 000038c0 cf3651bc cf3650e0 000053aa 00000380
> Call Trace:    [<c017510d>] [<c033336a>] [<c01748c0>] [<c0158624>]
> [<c015881f>]
> [<c0105da2>] [<c0109f3b>] [<c01f1aa7>] [<c0105d60>] [<c01f0613>]
> [<c01f6f5d>]
> [<c0109e16>]
> Code: 89 78 4c 89 78 48 8b 5c 24 08 31 c0 8b 74 24 0c 8b 7c 24 10
>
>
> >>EIP; c0172b9d <set_brk+3d/c0>   <=====
>
> Trace; c017510d <load_elf_binary+84d/10b0>
> Trace; c033336a <inet_recvmsg+4a/60>
> Trace; c01748c0 <load_elf_binary+0/10b0>
> Trace; c0158624 <search_binary_handler+154/200>
> Trace; c015881f <do_execve+14f/330>
> Trace; c0105da2 <sys_execve+42/80>
> Trace; c0109f3b <call_with_regs+4b/94>
> Trace; c01f1aa7 <deputy_syscall+a7/2b0>
> Trace; c0105d60 <sys_execve+0/80>
> Trace; c01f0613 <deputy_main_loop+433/590>
> Trace; c01f6f5d <mosix_pre_usermode_actions+6d/c0>
> Trace; c0109e16 <straight_to_mosix+5/d>
>
> Code;  c0172b9d <set_brk+3d/c0>
> 00000000 <_EIP>:
> Code;  c0172b9d <set_brk+3d/c0>   <=====
>    0:   89 78 4c                  mov    %edi,0x4c(%eax)   <=====
> Code;  c0172ba0 <set_brk+40/c0>
>    3:   89 78 48                  mov    %edi,0x48(%eax)
> Code;  c0172ba3 <set_brk+43/c0>
>    6:   8b 5c 24 08               mov    0x8(%esp),%ebx
> Code;  c0172ba7 <set_brk+47/c0>
>    a:   31 c0                     xor    %eax,%eax
> Code;  c0172ba9 <set_brk+49/c0>
>    c:   8b 74 24 0c               mov    0xc(%esp),%esi
> Code;  c0172bad <set_brk+4d/c0>
>   10:   8b 7c 24 10               mov    0x10(%esp),%edi
>
>
>
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