Hi hackers,
I have got an HP DL 385 dual opteron system,
with 2 on-board broadcom network cards.
If I use more NICs, I have to have ACPI turned on.
But if the ACPI is turned on, kernel does not boot,
this is an error message:
panic: npx: can't get ports
Does anybody knows a solution for that ?
Hi there,
Recently I tried to make a transparent web proxy on a machine
that run in bridging mode. At last, I decided to make a patch.
Here it is for those who want to do the same.
One interface should be given an IP address so squid may do
a requests. Squid listens on 127.0.0.1:8080.
I am using
Hi John,
thanks for commiting my previous boot2.c patch.
I would appreciate any hint about the following problem.
I am using 5.3, sources from 1 Dec 2004.
The environment I am using is this: ATA disk has one partition
with one file, /kernel. /kernel has MFS root filesystem.
there is no
How would one know the actual boot device
after kernel successfully booted ?
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, 2004 at 11:15:16AM -0500, Dan Nelson wrote:
In the last episode (Aug 17), Sergey Lyubka said:
How would one know the actual boot device after kernel successfully
booted ?
The kern.bootfile sysctl points to the kernel file that was loaded,
according to the loader. If you booted off
You don't say which version you are running, but in 5.x booting without
the loader is not supported in any way shape or form.
-- Brooks
Well I am booting 5.2 -current, yes, without the loader.
The image is here:
http://oasis.uptsoft.com/~devnull/floppy.img
MFS root is embedded into a
The best you can do is search your mountpoints and see whether any of
them has a /kernel file. The bootblock (and loader) uses the BIOS to
read the kernel file, so it's possible that the device may not even be
accessible from the running system. If, for example, you booted off a
floppy but
Discussion on -current, read vs mmap, explained this.
If userland process does pre-fault allocated memory, ng_mmq
appears to be considerably faster than pcap:
# ./benchmark rl0 /dev/mmq15 2
desc rcvd droppedseen totlen ppstime (sec)
mmq 76865 0
Does the ng_hub cause the packet to be copied? If so you've
still got the same number of copies as vanilla BPF.
ng_hub does copy a packets. But, this does not explain the test results.
the benchmark works like this:
1. connect ng_mmq node to ng_hub
2. run benchmark for mmq
3. open pcap
. is it OK to have no mutexes for ringbuffer operations ?
The ng_mmq code, as well as the benchmark code, are at
http://oasis.uptsoft.com/~devnull/ng_mmq/
Setup instructions are at
http://oasis.uptsoft.com/~devnull/ng_mmq/README
--
Sergey Lyubka, Network Security Consultant
NetFort Technologies Ltd
Hi Ed,
I did my benchmark by increasing the packet rate until I found
the point at which packets started to be dropped.
A bit offtopic - what traffic generator you use ?
In my testing I found the call to microtime() to be quite
expensive. (It will vary depending on which timecounter is
hackers,
I am running snort on 5.2.1-RELEASE, and I am getting high
dropped packets rate. traffic is quiet, about 1kpps, the box runs on xeon
processor, intel gigabit NICs (em driver), system load is low:
CPU states: 1.9% user, 5.1% nice, 1.6% system, 4.7% interrupt, 86.8% idle
Mem: 121M
not sure is it the correct list to ask,
but let give it a try.
I was using etherboot to boot the diskless station.
The kernel copied over the network find, but then I
saw no kernel messages on the console.
I put some debug messages into etherboot code, confirmed that
kernel was actually called.
Below is a little snipper that tries to dlopen(argv[1]).
It works fine until it is compiled with profiling support, -pg flag.
Compiled with -pg, dlopen() reports Service unavailable.
How to fix that ?
-sergey
#include dlfcn.h
#include stdlib.h
#include stdio.h
int main(int argc, char
Absolutely.
thanks, that helps!
On Wed, Dec 03, 2003 at 02:23:18AM -0800, Lev Walkin wrote:
-pg on your system implies static linking. dlopen() is not available in
statically linked binaries on FreeBSD and many other systems.
Consider building your binary dynamic by making sure there is a
this out about itself);
2) Have a thread wait for a specified amount of computer time (not
actual time so nanosleep won't work).
I looked at the man pages, but all I could find was runtime which seems
only to be accessible from the kernel.
--
Sergey Lyubka
Asita Technologies Int, Galway
.
--
Sergey Lyubka
Asita Technologies Int, Galway, Ireland
:wq
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Lions wrote a book far long ago, and it is still worth reading.
Why?
Because he didn't just show the code, he showed the concepts.
Describing, say, how to call malloc() is a stupid thing. This can
be outdated tomorrow.
But describing the concept, how kernel malloc interface has being
developed
the developers' handbook online, specifically so
things can be updated quickly. And it's difficult to get more text
for that; the people who can write that text are busy writing code.
--
Sergey Lyubka
Asita Technologies Int, Galway, Ireland
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On Thu, Jun 27, 2002 at 11:04:29AM -0700, Julian Elischer wrote:
try
call boot 0
sometimes you need to do it more than once (?)
On Thu, 27 Jun 2002, Danny Braniss wrote:
Aha.
Thanks for all.
May be this should be mentioned in ddb manpage ?
--
Sergey Lyubka
Asita Technologies Int
lack of knowing
which exact version provide this feature), you can just type reset at
the ddb prompt and have it reboot. Otherwise, you'll probably just have
to: call cpu_reset
BTW, if the page fault in kernel mode occurs.
is it any way to sync discs before reset ?
--
Sergey Lyubka
Asita
no need to jump.
Thanks,
-sergey
--
Sergey Lyubka
Asita Technologies Int, Galway, Ireland
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From my own notes:
The address of the begin symbol is pushed onto the stack,
and the btext() function returns ...not to its
Oh, got it.
That's because of paging is set up.
Thanks Tony !
-sergey
p.s. btw, btext executes in protected mode, not in real.
since the link is up now, you can refer to the article ,
that is described well there.
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