Re: [9fans] Welcome Plan 9 community

[Alexandru Gheorghe <alghe.global@gmail.com>]

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On 03/04/2014 12:19 AM, Alexandru Gheorghe wrote:
> On 03/03/2014 10:53 PM, Lyndon Nerenberg wrote:
>>
>> On Mar 3, 2014, at 12:52, Alexandru Gheorghe <alghe.global@gmail.com> wrote:
>>
>>> should we gather some configuration steps/examples for known stable
>>> builds of vbox and post them in a wiki somewhere(?)
>>
>> Yes!  That's what the wiki is for.
>>
> 
> sure, I agree. I am only enquiring so as to brainstorm if we should
> actually (and be better of) providing a sort of how-to in debugging
> network setup on plan9 (besides what is already on the net).
> 
> i.e., even if somebody runs into trouble (ultimately), it is better off
> posting his output of:
> 
> cat /net/ndb
> 
> ls /net | grep ether (optional)
> ls /net/ether*
> 
> ip/ipconfig -DGP
> 
> 
> in case he/she is running in recv timeout for 15 secs; shortcut:
> 
> ppid=`{ps | grep ipconfig | awk '{print $2}'}
> echo kill > /proc/$ppid/note
> 
> sorry for the `   as I am writing from GNU/Linux
> 
> 
> this may not fully represent what is needed, but this is what I could
> gather in few minutes of man pages and some trial and error, after only
> 30 minutes of Plan9 experience. so I am sure far more experienced users
> from the mailinglist can contribute to the article
> 
> I will try to tackle it this weekend from this approach/point of view,
> maybe I can come up with something rather useful, if not, at least
> networking setup for the build I use of vbox/os/v

ersion etc.
> 

Hmm, actually related to this, I encounter dhcprecv read timed out.
I searched and seems there are some interrupt related "issues", this
happens with VirtualBox (4.1.18_Debian r78361) for me, not on bare
metal. NIC is in NAT, tried with a second NIC in bridged; definitely not
the NIC as the below code also points out in  !0  and  !1

dhcp.c:
-------
void
dhcprecv(void)
{
[...]
        uchar buf[8000], vopts[256], taddr[IPaddrlen];
[...]
        memset(buf, 0, sizeof buf);
        alarm(1000);
!0      n = read(conf.fd, buf, sizeof buf);
        alarm(0);

        if(n < 0){
                rerrstr(err, sizeof err);
        !1      if(strstr(err, "interrupt") == nil)
                        warning("dhcprecv: bad read: %s", err);
                else
                        DEBUG("dhcprecv: read timed out");
                return;


n <- ipconfig.h:
----------------
typedef struct Conf Conf;
[...]
struct Conf
{
[...]
	/* dhcp specific */
	int	fd;


Any ideas? I don't seem to find plan9.ini to try the fix Akshat Kumar
pointed out in [1]; all the other answers from erik and ron are bare
metal hardware related (like the original post). How to deal with this
in VirtualBox?

Chipset is PIIX3 [2]


References:
[1]
https://groups.google.com/forum/?_escaped_fragment_=topic/comp.os.plan9/9nlmIoY4-C8#!topic/comp.os.plan9/9nlmIoY4-C8

[2] https://www.virtualbox.org/manual/ch03.html#settings-motherboard
(under Chipset section) -- there is another option "ICH9" and the MSI
seems a plus; not sure how this will interact with Plan9 but I'll give
it a go
-- 
; Alexandru Gheorghe
; alghe.global {at} gmail {dot} com
; OpenPGP key ID 0xCAF985D2


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