Here's the basic problem: The kernel is currently designed for
single-threaded operation plus interrupt handling. A piece of code
in the kernel can temporarily disable certain interrupts with the
spl*() codes to cover situations where a race on some system resource
might
On Sunday, 27 June 1999 at 9:33:09 +0200, [EMAIL PROTECTED] wrote:
Another datapoint ot consider, it seems that Linux (at least the derivative
version maintained by Alan Cox -- the other one :) ) has now grown an LVM
system (probably à la HP or AIX). That's what I've been told yesterday
Improving the Unix Kernels' API
A Kernel Discussion with Hacker Robert Ehrlich
Summary: after a discussion with R.E., I submit a suggestion about improving
the API of free Unices with useful features such as open(path,O_NULL);
Dear Free *n*x Kernel Hackers,
I've been
Greg Lehey wrote:
I've come to understanding that lack of documentation is probably one of
the factors that keep the system healthy, because it keeps the unskilled
people away. I don't know whether it's true but I read in books that
reading code is one of the methods to learn
On Sun, 27 Jun 1999, Alexander Viro wrote:
On Sun, 27 Jun 1999, Doug Rabson wrote:
This looks viable as long as you don't use small integers to represent
FL_UFS etc. Having a single header defining constants for all filesystems
Erm... sizeof(int)==4. I doubt that you will
(clri didn't work?)
Never heard about clri (was under Linux).
May not have existed, then, which *would* explain it. :-)
Another problem was the ability to change the mount status of a
partition from read-write to read-only or to unmounted,
See NetBSD (and presumably other BSD) "mount -o
On Sun, 27 Jun 1999, der Mouse wrote:
(clri didn't work?)
Never heard about clri (was under Linux).
May not have existed, then, which *would* explain it. :-)
# debugfs -w /dev/sda1
debugfs: clri file
debugfs: close
It exists, all right ;-) Even documented - man 8 debugfs and there
Alexander Viro wrote:
asbestos underware[1]
BTW, how does NetBSD deal with HFS cough forks?
/asbestos underware
easy, it doesn't :-) we don't currently have HFS support, mainly b/c the
only freeware implementations of it (that i'm aware of) are GPL'd, and no
one has been able to devote
On 25-Jun-99 Aaron Smith wrote:
On Fri, 25 Jun 1999 10:14:48 +0200, Sheldon Hearn writes:
I think I prefer the suggestion I saw from someone else, which would
allow
ftp stream tcp nowait/10/10/wrap root ...
This can be done in such a way as to be backward compatible. Looks like
On 25-Jun-99 Drew Eckhardt wrote:
In article [EMAIL PROTECTED] you write:
Here's one possibility, it adds a a wrap/nowrap field that goes beside the
wait/nowait field, so you would have:
ftp stream tcp nowait wrap root /usr/libexec/ftpd ftpd
-l
Breaking backwards
On Fri, 25 Jun 1999, David Malone wrote:
Some people think that doing the hosts.allow lookup is too expensive
for some services but not others. (It requires opening /etc/hosts.allow,
reading it in line by line and possibly doing DNS lookups).
I would hope that anyone concerned about speed
unsubscribe freebsd-hackers
end
-Original Message-
From: Thomas David Rivers [mailto:[EMAIL PROTECTED]]
Sent: Sunday, June 27, 1999 7:09 PM
To: [EMAIL PROTECTED]
Subject: setiathome crashes 3.2?
I seem to recall seeing this someone (this may not be the
right list.)
But -
Umm- I've been running it for weeks on 3.2 with no problem.
On Sun, 27 Jun 1999, Thomas David Rivers wrote:
I seem to recall seeing this someone (this may not be the
right list.)
But - I downloaded the 3.2 Seti@home and starting running it
on a left-over 75mhz laptop I have.
It
On Sun, 27 Jun 1999 22:26:34 EDT, John Baldwin writes:
Let's say I have two services, foo and bar, with food and bard. I want to
wrap food, but *NOT* bard and they are both in /etc/inetd.conf. How do
you propose to solve this with the internal wrapping (which is a good
idea, IMO as it
On Sun, Jun 27, 1999 at 09:33:45AM +0930, Greg Lehey wrote:
On Sunday, 27 June 1999 at 0:35:54 +0200, Ollivier Robert wrote:
I think one of the difficulty of growing a FS is that you have to
choose whether you need the FS to be contiguous or not. The latter
case makes it much more
Another datapoint ot consider, it seems that Linux (at least the derivative
version maintained by Alan Cox -- the other one :) ) has now grown an LVM
system (probably à la HP or AIX). That's what I've been told yesterday
during
a small conference about Linux and free software in France
Here's the basic problem: The kernel is currently designed for
single-threaded operation plus interrupt handling. A piece of code
in the kernel can temporarily disable certain interrupts with the
spl*() codes to cover situations where a race on some system resource
might
In message 199906270733.aaa10...@apollo.backplane.com Matthew Dillon writes:
: Here's the basic problem: The kernel is currently designed for
: single-threaded operation plus interrupt handling. A piece of code
: in the kernel can temporarily disable certain interrupts with the
:
On Sunday, 27 June 1999 at 9:33:09 +0200, sth...@nethelp.no wrote:
Another datapoint ot consider, it seems that Linux (at least the derivative
version maintained by Alan Cox -- the other one :) ) has now grown an LVM
system (probably à la HP or AIX). That's what I've been told yesterday
Improving the Unix Kernels' API
A Kernel Discussion with Hacker Robert Ehrlich
Summary: after a discussion with R.E., I submit a suggestion about improving
the API of free Unices with useful features such as open(path,O_NULL);
Dear Free *n*x Kernel Hackers,
I've been
.. but there remained one that garbled meta-data had made into a
non-existing block device, that would resist rm -f. He realized
that the device had an immutable attribute. However, the problem is
that to change the attribute, you have to open the file before you
can ioctl() on it;
BSD4.4
Francois-Rene Rideau wrote:
Robert told me that in some Unix flavors of old,
it was possible to open a file by path with a null access mode (O_NULL ?)
E.g. Linux. Very undocumented, but has been around for ages ('92 or
such). The main purpose is to keep the floppy drive from spinning up
to
Greg Lehey wrote:
I've come to understanding that lack of documentation is probably one of
the factors that keep the system healthy, because it keeps the unskilled
people away. I don't know whether it's true but I read in books that
reading code is one of the methods to learn programming.
On Sun, 27 Jun 1999, Bill Sommerfeld wrote:
.. but there remained one that garbled meta-data had made into a
non-existing block device, that would resist rm -f. He realized
that the device had an immutable attribute. However, the problem is
that to change the attribute, you have to
Usage of ioctl() on Linux was a bad idea and it's going to be fixed. More
or less in the same direction, not exactly the same - 4.4 chflags() works
fine for UFS and leaves other filesystems to map what they can into the
UFS set.
Which is bogus - immutable is not a UFS attribute, it's VFS
He realized that the device had an immutable attribute.
He tried to change the attribute with open() and ioctl()
As I think someone already mentioned, BSD has chflags(), which takes a
pathname.
Robert had to hand-remove the immutable flag
(I guess, by accessing the relevant block directly).
On Sun, 27 Jun 1999, Bill Sommerfeld wrote:
Usage of ioctl() on Linux was a bad idea and it's going to be fixed. More
or less in the same direction, not exactly the same - 4.4 chflags() works
fine for UFS and leaves other filesystems to map what they can into the
UFS set.
Which is
On Sun, 27 Jun 1999, Alexander Viro wrote:
On Sun, 27 Jun 1999, Bill Sommerfeld wrote:
Usage of ioctl() on Linux was a bad idea and it's going to be fixed. More
or less in the same direction, not exactly the same - 4.4 chflags() works
fine for UFS and leaves other filesystems to
Right. Except that UFS has not only generic attibutes. For example,
you have UF_NODUMP and SF_ARCHIVED. The *only* place in the /sys you
mention the former is sys/stat.h
Well, right, because backup/restore aren't part of the kernel...
(BTW, you don't even map it on EXT2_NODUMP_FL).
On Sun, 27 Jun 1999, Doug Rabson wrote:
This looks viable as long as you don't use small integers to represent
FL_UFS etc. Having a single header defining constants for all filesystems
Erm... sizeof(int)==4. I doubt that you will need more.
just doesn't scale at all.
Sure.
Alexander Viro wrote:
Proposed API on the Linux side being
int chflags(name, level, oldp, newp); where level is FL_VFS for generic
attirbutes (fs may map them on its own set) and FL_{UFS,EXT2,...} for raw
flags - corresponding filesystem is free to interpret the thing as it
likes and
To Unsubscribe: send mail to majord...@freebsd.org
with unsubscribe freebsd-hackers in the body of the message
On Sun, 27 Jun 1999, der Mouse wrote:
Another problem was the ability to change the mount status of a partition
from read-write to read-only or to unmounted,
See NetBSD (and presumably other BSD) mount -o update,rdonly and/or
umount -f. (Last I tried, the latter didn't work as it
On Sun, 27 Jun 1999, Jan-Simon Pendry wrote:
Alexander Viro wrote:
Proposed API on the Linux side being
int chflags(name, level, oldp, newp); where level is FL_VFS for generic
attirbutes (fs may map them on its own set) and FL_{UFS,EXT2,...} for raw
flags - corresponding
I'd like to volunteer to maintain ipfilter. I already told several people
at the usenix conference, but as I have seen others taking interest as
well, it seems right to at least spread it more publicly.
I am still waiting for a machine I won at the conference to start on it
though so it might
* Francis Jordan (fran...@netscape.net) [990626 06:03]:
xc/include/Xos_r.h
which contains definitions of same (basically, pwd.h wrappers) for various
platforms, but not FreeBSD (I guess at the time FreeBSD didn't have threads).
Unfortunately, the wrappers for other platforms are no
On Sun, 27 Jun 1999, der Mouse wrote:
# Robert had to hand-remove the immutable flag
# (I guess, by accessing the relevant block directly).
#
# (clri didn't work?)
Obviously the guy thinks along the lines that you need a file descriptor
to do things to files. That, or he didn't want to do an
Hi,
I set about to reconfigure my kernel and everything works great
except for sio2. My COM3 port is unusual, it has the port address 0x3e8
with an IRQ of 10 so I commented out the relevant sio2 line in my
configuration file and replaced it with this:
device sio2at isa? port 0x3e8
Hi,
I'm ready to import apmd into freefall CVS repository.
Now manpage (first version) and patch for CURRENT kernel were prepared :)
Please review them before my commit. Any comments, suggestions,
corrections are very appreciated.
The latest (and final?) version of apmd package is available
Nick Hibma hi...@skylink.it wrote:
Programmers need documentation too.
And they are going to scream like mad if there isn't any. But in the end
they start reading the code anyway, even if there is docu, because they
don't trust anything but their own eyes and brain.
It's all documented in C
On Sun, Jun 27, 1999 at 12:58:05PM -0400, der Mouse wrote:
As I think someone already mentioned, BSD has chflags(), [...]
Yup.
Robert had to hand-remove the immutable flag
(I guess, by accessing the relevant block directly).
(clri didn't work?)
Never heard about clri (was under Linux). And I
On Sun, 27 Jun 1999, Alexander Viro wrote:
On Sun, 27 Jun 1999, Doug Rabson wrote:
This looks viable as long as you don't use small integers to represent
FL_UFS etc. Having a single header defining constants for all filesystems
Erm... sizeof(int)==4. I doubt that you will need
(clri didn't work?)
Never heard about clri (was under Linux).
May not have existed, then, which *would* explain it. :-)
Another problem was the ability to change the mount status of a
partition from read-write to read-only or to unmounted,
See NetBSD (and presumably other BSD) mount -o
Is there any support or plans for support of kernel dma,
sort of like the aio stuff, however you just give the kernel
two file descriptors and perhaps some parameters (such as
seeking to a specific point on either or both files and
amount of data to be sent) and
the kernel will then do all the
On Sun, Jun 27, 1999 at 07:33:32PM -0400, der Mouse wrote:
If you re-read the original message, the problem is what to do about
processes with open file descriptors on the partition [...]
Yes, that's the most difficult part. [...] NetBSD manpage:
-f The filesystem is forcibly
On Sun, 27 Jun 1999, der Mouse wrote:
(clri didn't work?)
Never heard about clri (was under Linux).
May not have existed, then, which *would* explain it. :-)
# debugfs -w /dev/sda1
debugfs: clri file
debugfs: close
It exists, all right ;-) Even documented - man 8 debugfs and there
On Sun, 27 Jun 1999 20:43:28 -0400 (EDT)
Alexander Viro v...@math.psu.edu wrote:
Forced revoke()? But then there is mmap() and IIRC revoke() on *BSD
doesn't unmap the stuff. Oh, shit, there is such thing as pending
unlink... Does vgone() force it?
It doesn't unmap the region, but it
On Mon, 28 Jun 1999, Doug Rabson wrote:
I'm talking about the concept of a header file containing something like:
#define FL_VFS 0
#define FL_FOOFS1
#define FD_BARFS2
...
not being scalable.
Do you have a complete list of filesystem
On Sun, 27 Jun 1999, Jason Thorpe wrote:
Regarding unlink()... those aren't operations on vnodes. Those are
operations on the filesystem namespace, and are thus (correctly)
unaffected.
Eh, wait. Those are operations on namespace, but at some moment you need
to clean the bit in inode
Alexander Viro wrote:
asbestos underware[1]
BTW, how does NetBSD deal with HFS cough forks?
/asbestos underware
easy, it doesn't :-) we don't currently have HFS support, mainly b/c the
only freeware implementations of it (that i'm aware of) are GPL'd, and no
one has been able to devote enough
On 27 Jun, Jason Thorpe wrote:
+-
| Alexander Viro v...@math.psu.edu wrote:
|doesn't unmap the stuff. Oh, shit, there is such thing as pending
|unlink... Does vgone() force it?
|
| Regarding unlink()... those aren't operations on vnodes. Those are
| operations on the filesystem
On Sun, 27 Jun 1999, Alexander Viro wrote:
As for the opening with no permissions - well, it would make *big* sense
if we could narrow down the API and move chown(), chmod(), etc. into libc
leaving f-variants in the kernel. Binary compatibility... Extreme variant
might include
On 27 Jun, To: thor...@nas.nasa.gov wrote:
+-
| (To which my own answer would be: deallocated on close as usual, no
| reason to treat this case specially that I know of.)
+---8
Strike that, I was on the wrong page. (Crossed threads re: general
revoke() on Linux)
--
brandon s. allbery
On Sun, 27 Jun 1999 allb...@ece.cmu.edu wrote:
On 27 Jun, Jason Thorpe wrote:
+-
| Alexander Viro v...@math.psu.edu wrote:
|doesn't unmap the stuff. Oh, shit, there is such thing as pending
|unlink... Does vgone() force it?
|
| Regarding unlink()... those aren't
I seem to recall seeing this someone (this may not be the
right list.)
But - I downloaded the 3.2 s...@home and starting running it
on a left-over 75mhz laptop I have.
It seems to crash the laptop (silently lock it up, actually)
fairly quickly.
Did I recall someone else mentioning that?
-f The filesystem is forcibly unmounted. Active special devices
continue to work, but all other files return errors if further
accesses are attempted.
I think that returning errors is WRONG, unless [...]
It means that you can't fix the problem with the
On 25-Jun-99 Aaron Smith wrote:
On Fri, 25 Jun 1999 10:14:48 +0200, Sheldon Hearn writes:
I think I prefer the suggestion I saw from someone else, which would
allow
ftp stream tcp nowait/10/10/wrap root ...
This can be done in such a way as to be backward compatible. Looks like
On 25-Jun-99 Drew Eckhardt wrote:
In article 199906242353.taa06...@smtp4.erols.com you write:
Here's one possibility, it adds a a wrap/nowrap field that goes beside the
wait/nowait field, so you would have:
ftp stream tcp nowait wrap root /usr/libexec/ftpd ftpd
-l
On Fri, 25 Jun 1999, David Malone wrote:
Some people think that doing the hosts.allow lookup is too expensive
for some services but not others. (It requires opening /etc/hosts.allow,
reading it in line by line and possibly doing DNS lookups).
I would hope that anyone concerned about speed
unsubscribe freebsd-hackers
end
-Original Message-
From: Thomas David Rivers [mailto:riv...@dignus.com]
Sent: Sunday, June 27, 1999 7:09 PM
To: freebsd-hackers@FreeBSD.ORG
Subject: setiathome crashes 3.2?
I seem to recall seeing this someone (this may not be the
right list.)
Umm- I've been running it for weeks on 3.2 with no problem.
On Sun, 27 Jun 1999, Thomas David Rivers wrote:
I seem to recall seeing this someone (this may not be the
right list.)
But - I downloaded the 3.2 s...@home and starting running it
on a left-over 75mhz laptop I have.
It
On Sun, 27 Jun 1999 22:26:34 EDT, John Baldwin writes:
Let's say I have two services, foo and bar, with food and bard. I want to
wrap food, but *NOT* bard and they are both in /etc/inetd.conf. How do
you propose to solve this with the internal wrapping (which is a good
idea, IMO as it eliminates
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