Re: [uml-user] virtual networking ok/ now kernel panic

[Roland v. H. <rh...@xe...>]

Hi Jeff,

this post was very useful, networking is fine now, but i've problem with
the kernel now:

what i did: i ran bonnie++ (http://www.coker.com.au/bonnie++/) to get some
knowledge about the performance. i've forgotten to add -s switch to limit
disk usage to 100M, the disk was full, the kernel paniced.
Question Nr. 1: is this ok ? (i'm sorry i have no kernel trace of this
and i can't reproduce it...)

afterwards i checked / (ext2), everything worked fine, but now i'm not
able to run tcpdump any longer (before it worked fine):

------------------------- gdb output -------------------------
Breakpoint 1, panic (
    fmt=0xa014c980 "No physical or IO memory region for address 0x%x\n")
    at panic.c:52
52      panic.c: No such file or directory.
(gdb) where
#0  panic (fmt=0xa014c980 "No physical or IO memory region for address
0x%x\n")
    at panic.c:52
#1  0xa00e1484 in map (virt=1075105792, p=0x162c000, len=4096, r=16, w=0,
x=16)
    at mem_user.c:213
#2  0xa00e4b29 in fix_range (mm=0xa09f8940, start_addr=1075105792,
    end_addr=1075109888, force=0) at tlb.c:65
#3  0xa00e4dca in flush_tlb_range (mm=0xa09f8940, start=1075105792,
    end=1075109888) at tlb.c:169
#4  0xa0021ff9 in remap_page_range (from=1077936128, phys_addr=3243110400,
    size=4096, prot={pgprot = 89}) at memory.c:868
#5  0xa00dd967 in packet_mmap (file=0xa08c45a0, sock=0xa22a8380,
    vma=0xa2002740) at af_packet.c:1766
#6  0xa009ca6a in sock_mmap (file=0xa08c45a0, vma=0xa2002740) at
socket.c:708
#7  0xa00231a4 in do_mmap_pgoff (file=0xa08c45a0, addr=1075105792,
len=131072,
    prot=7, flags=1, pgoff=0) at mmap.c:537
#8  0xa00e2594 in sys_mmap2 (addr=0, len=131072, prot=7, flags=1, fd=3,
    pgoff=0) at syscall_kern.c:78
#9  0xa00e3e2c in execute_syscall (regs={regs = {0, 131072, 7, 1, 3, 0,
        4294967258, 43, 43, 0, 0, 192, 1074793027, 35, 582, 2684352748, 43}})
    at syscall_kern.c:410
#10 0xa00e3f36 in syscall_handler (unused=0x0) at syscall_user.c:70
------------------------------------------------------------

i've tested the tcpdump binary on another (real) host, it works fine...
this panic happens each time i run tcpdump, i found no other binary which
has the same effect now...

Any thoughts ?

Greetings,

Roland


On Wed, 30 Jan 2002, Jeff Dike wrote:

> rh...@xe... said:
> > If we use routing, we have to change at least the config of router
> > which serves the hosts network.
>
> OK, read the following by Andy Kwong, which was posted back in August, and
> which I have so far failed to htmlize and put on the site:
>
> http://www.geocrawler.com/archives/3/597/2001/8/50/6441084/
>