Re: [uml-user] Receive segv when creating unix domain socket on hostfs mounted directory

[richard -r. w. <ric...@gm...>]

Hi!

On Tue, Aug 21, 2012 at 5:15 PM, 张东亚 <for...@gm...> wrote:
> Hi,
>   I am running linux 3.4 uml,it works quite well, however recently I
> want to running openvswitch on the uml instance,I will got an segv
> fault.

What segfaulted? The UML kernel or some user space application?

>   I set a breadpoint in the kernel for unix_bind and found the
> following error, /usr/work/umser is the host directory which I mounted
> as uml /usr.
>   Because I am not quite familiar with kernel code, hope that someone
> can give me a hint how to fix this, thanks a lot.
>

What exactly is the problem?

>
> Breakpoint 2, do_mknod (
>     file=0x17d9d000
> "//usr/work/umusr/local/var/run/openvswitch/ovsdb-server.858.ctl",
> mode=49600,
>     major=0, minor=0) at fs/hostfs/hostfs_user.c:323
>
> int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor)
> {
>         int err;
>
>         err = mknod(file, mode, os_makedev(major, minor));
>         if (err)
>                 return -errno;   // return -12???

-12 is ENOMEM.
Looks like your machine runs out of memory...

-- 
Thanks,
//richard