esources to an input data stream
requires either resources capable of the largest data stream leaving
some idle most of the time or pushing back on the input stream
potentially causing an indefinite processing delay.
hth
Geoff Steckel
pliance which did complex resource
allocation while forwarding packets. It wasn't simple.
geoff steckel
On 12/23/24 11:20 AM, Gábor LENCSE wrote:
Under Linux, one can use the isolcpus kernel command line
parameter to exclude certain cores from the scheduler.
I use the DPDK rte_eal_remote_launch() function to start a thread on
an isolated CPU core.
Is there anything similar under OpenBSD?
Is th
al.
Code sprawl conceals many problems.
Old paraphrase: "Show me your code and I know nothing
Show me your data structures and I know exactly what you can do"
Knuth? Wirth? I forget.
good luck,
geoff steckel
On 10/25/24 13:35, Anon Loli wrote:
[snip]
The more SLOC you have, the bigger chance is that there is evil hidden
somewhere.
All you need sometimes is 1 sneaky line amongst thousands, and sometimes even
millions SLOC.
Anecdotally autos have over 10,000,000 lines of code.
Do you ride in one? Sub
en if you put a filter in they could access each other using a VPN.
geoff steckel
use.
Closing 6 windows cleared the problem.
If you can get top running in a terminal window the memory display
near the top of the screen shows RAM and swap usage.
geoff steckel
27;s not too hard to cause the situation.
Softdep could fill RAM with dirty inodes pretty easily.
geoff steckel
On 9/2/24 16:21, Chris Ross wrote:
I’m trying to move from a static IPv6 network to a dynamic allocation from an
ISP. The hard part is that some of my hosts have secondary addresses for
specific services to use. I need to find a way to listen to router adverts
but then manually add an alias wit
On 8/8/24 02:39, Eric Furman wrote:
On Wed, Aug 7, 2024, at 8:44 PM, Justin Yates Fletcher wrote:
On Wed, 2024-08-07 at 01:50 +0200, David Uhden Collado wrote:
Now I understand the rationale. It might be beneficial for the
installer
to offer multiple templates when selecting the automatic pa
sfer faster than sd2.
Is it likely that the kernel services interrupts, etc. in drive # order?
(Reading the Source doesn't give an obvious answer.
There are interactions with scheduling)
thanks
Geoff Steckel
have multi-terabyte filesystems holding music, video, or images which
only change once a month or less.
Those are marked read-only in /etc/fstab.
I mount -u -o rw when needed, then mount -u -o ro when I am done.
This does not work for /usr, /var, /home etc.
Geoff Steckel
a program to use the data.
Geoff Steckel
On 6/25/24 09:07, Kirill A. Korinsky wrote:
On Tue, 25 Jun 2024 04:05:45 +0100,
"B. Atticus Grobe" wrote:
A word of warning: even multiple overwrites are not guaranteed to erase any kind
of flash-based storage. This applies even to some spinning rust now that have
intermediate flash storage cac
ry call which
returns something useful like a serial number, manufacturer, etcThat
script would only have to be run once a session. hth Geoff Steckel
On 5/31/24 15:46, Harald Arnesen wrote:
MIZSEI Zoltán [31/05/2024 20.15]:
Interestingly BeOS and Haiku lets you to mount an audio cd, it
generates a vfs from the toc and shows the tracks as wav or flac
(fixme), it does an automatic conversion behind the courtains if you
copy a file from an au
On 2023-11-24, Crystal Kolipe wrote:
At the end of last year, I did a comprehensive write-up about using blu-ray
recordable on OpenBSD, and as part of that I checked around 100 BD-R discs
that had been written about 10 years previously and verified as good at the
time. Ten years laster, I found
On 11/26/23 08:52, Stuart Henderson wrote:
Anyone know whether USB BD-R drives are likely to work on OpenBSD?
I've used several. XD08UMB-S works for reading - haven't tried writing yet.
Earlier ones worked for reading and writing
On 11/22/23 20:31, j...@bitminer.ca wrote
For long-term storage, you have other risks to manage, not the
simple technical risk of "will my portable-USB disk be readable in
2038?".
Interfaces die - IDE interface cards? Even if you have one the ISA bus
might not be available. Parallel SCSI, para
ob on the same machine without softdep
ran slowly and with lots of moderate disk rattle but it
completed normally.
My guess is that softdep ran out of buffers and purged
every one of them. All at once.
Never enabled softdep after that.
Geoff Steckel
On 9/5/23 15:41, Rudolf Leitgeb wrote:
On Tue, 2023-09-05 at 14:16 -0400, John Holland wrote:
So this gave me the list of the files with what they seem to be in
groups. I think a lot of them are browser cache, jpegs, pngsI
looked
at some of the gzipped ones and they were web pages and css fi
- users to accept
whatever signal processing the system applies that
processing should follow good practice as well.
Other OSes allow unprivileged users to access raw audio devices
and bypass any system processing.
Users should be given that option.
Geoff Steckel
On 1/10/23 03:11, Jan Stary wrote:
I
The math goes back to Shannon and sampling theory:
Any time you remove significant digits you remove information.
One interpretation is that you introduce noise.
Period. The math says so.
The math says what the resulting power is.
You have the option to determine where the noise goes.
If you do
l the documentation
and the program itself.
Now I'll shut up.
Geoff Steckel
like that is implied by using DHCP.
Are other routes changed or deleted?
Exactly what does the updated resolv.conf contain?
DHCP can configure other services. Does dhcpleased do any of that?
thanks
Geoff Steckel
sidered as files not
options
What do you think about it ?
In 1974, one said
cp ./-hello foo\*hello
Though using '*' in a filename was considered impolite.
Students often tried to hide files from machine operators so
there were often strange filenames including, for instance,
backspaces.
Geoff Steckel
27;s a off-by-4 in RAD display in tcpdump. Will post that later.
I added the extra detail in that as well - will post if anyone things
it's useful.
geoff steckel
On 10/14/22 05:21, Alexandre Ratchov wrote:
On Thu, Oct 13, 2022 at 05:20:49PM -0400, Geoff Steckel wrote:
If those don't work it's a (fixable) bug/not-yet-implemented.
I've tried those settings with ambiguous results but not failure.
My usb dacs don't have visible indic
resampling quality in any particular implementation
is not guaranteed and can introduce significant artifacts.
Declaring a particular implementation "good enough" without
knowing more seems premature.
geoff steckel
being very, very selective, I'd add
to your list:
the output of pkg_info
/usr/local, /var/mail
potentially /usr/src, /var/www, /var/unbound, /var/nsd
any directories I added or I'm not sure about
any system directories where I've modified files
Any volumes not part of the base system have their own dump schedule.
hth
Geoff Steckel
B video.
Keystroke/mouseclick to audio start/stop is always well under 100ms,
probably 30 ms or less
Getting that to work probably requires significant
twisty kernel & program optimization.
Geoff Steckel
On 10/20/2015 10:19 PM, Chris Cappuccio wrote:
Geoff Steckel [g...@oat.com] wrote:
I'm using sixxx.net as an IPv6 tunnel gateway.
They gave me 2001:::0111::0002 as my tunnel endpoint and
2001:::0111::1 as their end and router address.
They gave me 2001:::8111::/64 f
.
Is there a simpler method?
The far end of the tunnel to sixxx has no hardware
address, so I haven't figured out how to do obscene
things to use that as a gateway address.
Suggestions, upgrade to 5.8 or current or RTFM appreciated.
Geoff Steckel
dparanoia as the best cd-audio reading
program I've found. There may be ones (as above) which reach down
yet another level. I've found that using a good drive (good
manufacture and not used to death) only 1 out of 750 of
my random collection of discs can't be read successfully.
Geoff Steckel
lk
processing I need.
I hope this helps.
Geoff Steckel
On 07/30/2015 11:14 AM, Seth wrote:
On Thu, 30 Jul 2015 08:09:38 -0700, Seth wrote:
Sorry, forgot the link to greyscanner post
[3] http://www.mail-archive.com/misc@openbsd.org/msg116961.html
DNSBL is very powerful:
post:gwes:4612$ grep -c listed /var/log/maillog
501
post:gwes:grep -c -n sen
Some sound cards have two volume controls: one is for the specific
source and the other is for the whole card. Both must be at 100%
for maximum output.
On 07/23/2015 06:55 AM, ropers wrote:
I'm talking out my arse here, but:
To me, your submission vaguely reminds me of the CD Loudness War <
http
ot so far as to make
the conceptual bases incompatible.
Linux went its own way from the beginning and it isn't close to BSD.
Geoff Steckel
put information gathering code.
I suspect some sort of mismatch in the state matching code but
that's because I can't think of anywhere else.
If anyone has a little time to suggest places to look I'd appreciate it.
If sending to tech@ be helpful I'll do that.
thanks
Geoff Steckel
On 01/03/2015 08:42 AM, Reyk Floeter wrote:
On Thu, Jan 01, 2015 at 11:54:46PM -0500, Geoff Steckel wrote:
Is there any way todo the equivalent of:
server "an.example.com"
listen on 192.168.2.99
listen on 2001.fefe.1.1::99
??
It appears that the code in parse.y explicit
t to maintain.
Is someone planning to work in this area soon?
thanks
Geoff Steckel
UC 00 - 4 gif0
If this is not the intended behavior, I can dig into
the code - this would be in the ip6 route add code?
If it should be sent there I'll copy this to tech@
thanks
Geoff Steckel
, a consumer drive could work very well.
I had several very premature drive failures using consumer
drives in a consumer multi-bay case. Since then I've always
mounted drives with considerable space between them and
have had no failures. YMMV
Geoff Steckel
On 08/29/2014 04:04 PM, Evan Root wrote:
> It seems that after reading the backblaze and google papers about drive
> reliability that there is no statistically obvious difference. It's too
> close to call. Both papers end with hedges and further questions. Even if
> enterprise drives are more reli
On 08/27/2014 01:03 PM, Christian Weisgerber wrote:
> Paul de Weerd:
>
>> | Here's a bold suggestion: Don't buy consumer drives.
>>
>> The guys that buy LOTS disagree.
>> https://www.backblaze.com/blog/what-hard-drive-should-i-buy/
> Oh, I know. That's a different operations model, though. When y
able radeondrm
> *nnn radeondrm disabled
> ukc> quit
> [happy (hopefully) boot]
>
> IF you have another monitor of any kind of any attachment, I'd like to
> verify your problem persists with it or goes away (without the UKC hack,
> of course)
>
> Nick.
This is a common problem, even with DVI. If the monitor and
video card/driver/whatever disagree about when the blanking
intervals start or end, stuff will be chopped off one side
or top/bottom of the display.
Usually, with 24x80 text, only one character is chopped off
the left side. If the characters are smaller, one can lose
so many that the console is useless.
Using something other than 24x80 as the default before the
system setup is complete is a harmful regression.
Geoff Steckel
s.
This scenario shows a danger of silently passing corrupt packets.
It would be good if when data protected by a checksum is modified,
the current checksum is validated and some appropriate? action is done
(drop? produce invalid new checksum?) when proceeding.
Geoff Steckel
;>
>> So to verify I tried a plain copy command between two internal hardisks.
>> After the first 7G transfer had decreased to under 200K per sec. My home PC
>> has 8G of RAM.
>>
>> Regards
>> Maurice
Last time I tried to read an ext3 (with journal disabled) IIRC it would
mount but no other operation worked. That was 5.2 or so. FS was written
by Linux 3.2.
In return, of course, that Linux wouldn't mount an OpenBSD FFS.
Geoff Steckel
.
If your network has any sort of dynamic routing (for instance, multiple
outgoing interfaces with failover) that's easy to misconfigure.
Geoff Steckel
assle. Once the
> setting is flashed to the card, it works nicely.
>
> With MPT2, there is no "lsiutil" and the "sas2ircu" program
> doesn't give you any of the flexibility of lsiutil.
A project I was working on did. I still have the cards.
Geoff Steckel
t metric change capabilities
be accessible? Could a boot-time or config option work?
I'd be very glad to test and help debug anything in this area.
thanks
Geoff Steckel
a
read and written for patterns.
Almost anything with microcodeor firmware can be subverted with
very few traces. That means network interfaces, CPUs, disk controllers,
USB interfaces, .
Oh yes - cars & trucks.
Geoff Steckel
ks (at least, high performance
for the time). All of the above were real problems I encountered.
Geoff Steckel
ards' firmware would serve a better place for backdoor -
> they interfere with network and do some cryptography the OS relies upon.
>
Don't forget disk drives. Hmmm, I've been reset, and we'rereading block
1. Let's give
him hidden block 1.With a little tinkering,multiarchitecture takeovers.
Geoff Steckel
complished,
though NFS is a bad example.
Synchronizing the mess is, in the general case, impossible.
Basically, SSI is one of those traps (like threads, again) that
might appeal to the naive but dies horribly once one really
looks at the idea.
Geoff Steckel
k 0
or anything in the first (say) 1000 blocks.
If you get errors from attempting to read blocks far away from 0, it's
likely that the disk is now a paperweight or a source of two powerful
magnets.
Geoff Steckel
er and CPU speeds 10X higher changing the limit might
be considered.
The above is from observing various OSes externals and internals.
The kernel group obviously know far more about how the limits are chosen.
Geoff Steckel
On 08/06/2012 10:42 PM, Nick Holland wrote:
> On 08/06/12 17:22, Geoff Steckel wrote:
>> Does anyone know what the current state of softraid 5 is?
>> The man page says rebuild and scrub are not supported.
>> The last checkin was about 6 months ago.
> sounds like your quest
.
One place I worked put 4 drives in a case with
fans for 1. RAID go bye-bye.
Geoff Steckel
t of the way, ensure low interrupt latency by
eliminating all kernel spins or indefinitely long loops with interrupts
blocked, etc.
Geoff Steckel
ly question: in order to achieve the throughput described,
is the application in a hard loop monitoring the ring status? If so, the
statistic is of limited applicability.
Geoff Steckel
On 06/28/2012 01:50 PM, Joe S wrote:
I'm looking to build a new mini-itx firewall based on OpenBSD and
would like to get some advice on CPU selection. I've seen multiple
statements on this list that indicate CPU cache and CPU speed are the
most important factors. Sorry if this is a silly question
On 06/21/2012 06:03 PM, Kenneth R Westerback wrote:
On Fri, Jun 22, 2012 at 12:26:23AM +1000, Jonathan Gray wrote:
On Thu, Jun 21, 2012 at 11:54:55PM +1000, Jonathan Gray wrote:
It seems the lba48 capacity values being pulled out aren't sane
for whatever reason.
Can you try switch the controll
for systems hosting multiple
OSes. That's all I meant. Sorry that it wasn't clear.
Geoff Steckel
alware during boot. That's enough
to make me shudder. Obviously, opportunities abound for that code
to prevent "unauthorized" O/Ses from running or subvert them once
running.
Are there other and larger issues?
On the other hand, GPT by itself appears useful. Does it also
contain boobytraps?
Thanks!
Geoff Steckel
On 05/22/2012 08:50 AM, Stuart Henderson wrote:
On 2012-05-21, Geoff Steckel wrote:
On 05/20/2012 10:49 PM, Nick Holland wrote:
On 05/20/12 17:49, David Diggles wrote:
Ok, I am interested in opinions on why one should migrate from BIND to unbound?
1) It is unlikely there will be any more
special cases for passwd, etc, but those are hard-coded.
If there is any consensus that this would be useful to anyone else,
I would be glad to contribute to any project of this sort if one exists,
either to test or to work on any part of it.
Geoff Steckel
3) internal nameserver for domains in (1) with additional records
4) internal nameserver for internal domains
If there is a discussion of this in an archive some place I'll look for it.
I didn't see much useful searching for split horizon and unbound.
thanks!
Geoff Steckel
[lots of text snipped]
I was looking at laptops recently. I took 2 linux CDs, an OpenBSD
install CD,
and a USB stick with OpenBSD on it.
I got a lot more useful information about hardware compatibility from
the OpenBSDs than the Linux CDs because OpenBSD didn't try to bring up
anything graphica
nfigured
I have an HP Pavilion-1 4010dm-US with that chip in it. Even the Penguin
doesn't have a working driver. The only thing I was able to make work on
it was the Broadcom binary blob. Your plan for another interface sounds
wise.
Geoff Steckel
ou will see anything useful. Use a2ps
(for example - there are other programs which do the same) to format
plain text into postscript.
Geoff Steckel
On 02/10/2012 05:04 AM, Jan Stary wrote:
On Feb 09 18:30:01, Geoff Steckel wrote:
Has 'sox' been mentioned in this context? For many simple filters,
source->sox->aucat works well for me. Command line only.
Yes, I'd very much like to stay on the command line for this.
Wou
On 02/09/2012 06:05 PM, Alexandre H wrote:
You'll face other problems preventing you from doing everything with
aucat. First, there's no reverb, which is necessary to create the
spacial feel, volume changes are too abrupt (cause small clicks) and
not real-time.
Implementing pan, effects and smoo
python 3 was moved to "lang/python" from lang/python3 in ports.
That probably is a good idea.
Unfortunately, and to my *great* inconvenience, lang/python3 was
removed from ports and packages before 5.1 will be released.
I had begun developing an application using python3 and had
to reinstall. It
would rule this out.
Again, if this has been covered, just ignore me.
Geoff Steckel
pyout() shouldn't happen.
I'm trying to run multiple 140MB/sec drives simultaneously and
the copyout() is a killer - it's eating more of the
system memory and CPU bandwidth than I'd like.
thanks
Geoff Steckel
Responding to myself - on further examination, if the system has
only 2G,
I haven't looked for years, but in the dim dark past many NIC drivers
made non-optimal hardware accesses which slowed them down quite a bit.
Profiling helped find some of them. Exactly how many cycles of stall
happen during a bus (PCI, PCIe, ISA, VME) reference depends on the CPU,
but a wild gu
usage so check with all of them running hard.
Memory chips also use more power when cycled, but if the CPU is stalled
waiting for memory it may use less power, so the interaction is not a
priori well defined.
Geoff Steckel
On 08/08/2010 03:28 PM, Henning Brauer wrote:
* Geoff Steckel [2010-08-08 20:29]:
Your pf.conf should only hold state on one side. Multiple conflicting
state table entries for the same connection ensure flaky failures.
that is wrong in so many ways.
first, "should only hold state o
-state label int-in
This should show where things go.
Geoff Steckel
curmudgeon for hire
My system:
$ dmesg
OpenBSD 4.7 (GENERIC) #558: Wed Mar 17 20:46:15 MDT 2010
dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: VIA Esther processor 1500MHz ("CentaurHauls" 68
it won't work worth used tissue paper.
geoff steckel
>I knew it was a matter of time before the "vlan insecurity" bullshit hit
>the fan. RTFA. Who says anything about "blindly trusting" switches?
>If you can't correctly configure VLANs on your switches, and filter on
>vlan(4) interfaces in PF, you shouldn't be administering production
>networks. T
e driver (with the latest fixes) catches
it.
The 4-dc card is better but harder to find.
Is there a requirement for low power or small form factor?
geoff steckel
Markus wrote:
On Wed, 18 15:13 , Geoff Steckel wrote:
Markus wrote:
Good evening,
I'm setting off for writing prototype code for an imaging
application. For this reason, I'm in need of an extremely fast way to
transport large amounts of UDP data to a userland application
spot(s) in the kernel? It would be very instructive.
thanks
geoff steckel
>The people reading the faq are not the people who need custom kernels.
>Those people *know* what they need and are not deterred. But as
>always, when we try to help the userbase by offering the advice they
>need, someone needs to chime in and muddy the waters. So now some dude
>is going to
On Fri, 6 Jun 2008 10:14:55 -0400
"Ted Unangst" <[EMAIL PROTECTED]> wrote
On 6/6/08, Geoff Steckel <[EMAIL PROTECTED]> wrote:
>> For systems which must boot very quickly, removing unused drivers
>> whose probe routines cause significant timeouts can ma
doing to
initialize itself. It does many thousands of disk accesses for no
visible benefit and takes a very long time to do them.
curmudgeonly
geoff steckel
s any interest. Otherwise it'll wait until
the indefinite future.
geoff steckel
the problem.
Thanks very much.
geoff steckel
diff -Pupr /deep/4.3/src/sbin/fsck_ffs/Makefile fsck_ffs/Makefile
--- /deep/4.3/src/sbin/fsck_ffs/MakefileSun Sep 21 07:36:37 1997
+++ fsck_ffs/Makefile Mon May 19 15:08:41 2008
@@ -3,7 +3,7 @@
PROG= fsck_ffs
MAN= fsck_ffs.8
SRCS= di
ng, 'find first', and 'find next' code in the same routine
is in my very rigid and uncompromising mind a fatal design error of
the genus "conflation of similar but incompatible goals".
geoff steckel
Omnivore Technology
Are there any people using OpenBSD on MVME68K platforms?
I just was tinkering with the parallel port on a MVME167
and got it working. If there's any interest, I'll think
about constructing something - no guarantees how soon.
geoff steckel
Theo de Raadt wrote:
You really should show a dmesg of your machine.
sure:
Jan 10 21:54:31 lib /bsd: OpenBSD 4.2-current (fins) #11: Thu Jan 10
21:29:15 EST 2008
Jan 10 21:54:31 lib /bsd:
[EMAIL PROTECTED]:/doot/4.2snap/src/sys/arch/i386/compile/fins
Jan 10 21:54:31 lib /bsd: cpu0: VIA Esthe
bofh wrote:
On Wed, Mar 12, 2008 at 8:45 PM, Geoff Steckel <[EMAIL PROTECTED]> wrote:
Mr. Bihlmaier mentioned that there is no support for the sensors
on the Jetway J7F2 boards. I have written a driver for the Fintek
F71805F found on some of those boards. It is a modification of th
Mr. Bihlmaier mentioned that there is no support for the sensors
on the Jetway J7F2 boards. I have written a driver for the Fintek
F71805F found on some of those boards. It is a modification of the
LM78 driver (lm78.c) http://www.oat.com/fintek";>here.
Several people have used it in 4.2. Since lm7
Artur Grabowski wrote:
Geoff Steckel <[EMAIL PROTECTED]> writes:
Any argument to experience must be from similar actual implementations
using "threads" and another model, such as multiple processes with
interprocess communications.
Sure. I'll pick up the challenge.
At
Gregg Reynolds wrote:
On 2/18/08, Geoff Steckel <[EMAIL PROTECTED]> wrote:
This is my last posting on this, take heart.
Please enlighten me if there are any -other-
http://acmqueue.com/modules.php?name=Content&pa=list_pages_issues&issue_id=26
See especially "Software
of CPUs
where otherwise a prohibitive amount of IPC would be necessary)
and a low cost as a result of the symmetry of the problem could
make it a good solution, if and only if the other parts of the
program were suitably decomposed.
Thank you for bringing up this very specific point.
geoff steckel
e people paying for and using
the programs. I count faster development as an
advantage, increased maintenance (bugs) as a
disadvantage. The second strongly outweighs the
first.
geoff steckel
David Higgs wrote:
On Feb 17, 2008 8:01 PM, Geoff Steckel <[EMAIL PROTECTED]> wrote:
Gregg Reynolds wrote:
On 2/17/08, Marc Balmer <[EMAIL PROTECTED]> wrote:
Geoff Steckel wrote:
Threads or any other form of uncontrolled resource sharing
are very bad ideas.
that might be tr
1 - 100 of 124 matches
Mail list logo
