Eric S. Raymond wrote:
More generally, arguments of the form Non-mainline custom hack X
could invalidate constraint Y, therefore we can't have Y in the
rulebase are dangerous -- I suspect you could reduce your set of
constraints to nil very quickly that way, and thus badly screw over
the 99%
Eric S. Raymond wrote:
Tom Rini [EMAIL PROTECTED]:
Only sort-of. There are some cases where you can get away with that.
Probably. eg If you ask for PARPORT, on x86 that means yes to PARPORT_PC,
always (right?)
Yes. So the right answer there isn't to use a derivation but to say:
Alan Cox [EMAIL PROTECTED]:
There are also a lot of config options that are implied by your setup in
an embedded enviromment but which you dont actually want because you didnt
wire them
Well, then, you don't specify the guard capability! If your MV147 isn't
wired for serial, then leave
Jamie Lokier [EMAIL PROTECTED]:
Which is unfortunately wrong if you want the parport subsystem on x86
but won't be using the parport_pc driver with it. I.e. you'll be using
some other driver which isn't part of the kernel tree. Perhaps a
modified version of parport_pc, perhaps something
David Weinehall [EMAIL PROTECTED]:
require X86 and PARPORT implies PARPORT_PC
unless X86==n suppress PARPORT_PC
which forces PARPORT_PC==y and makes the question invisible on X86
machines, but leaves the question visible on all others.
Yes, but there are quite a lot of people who
[EMAIL PROTECTED] (Horst von Brand) wrote on 07.05.01 in
[EMAIL PROTECTED]:
David S. Miller [EMAIL PROTECTED] said:
Jonathan Morton writes:
-page_count(page) == (1 + !!page-buffers));
Two inversions in a row?
It is the most straightforward way to make
Folks,
ECN is about to become a Proposed Standard RFC. Thanks to
efforts from the Linux community, a few issues were discovered
in the course of deploying the code. Special kudos go to Alexey
Kuznetsov and David Miller.
I wont go into details of the issues other than to say some
midlle-box
David Brownell writes:
Pete's patch to pci_pool_free() is fine with me, and I'd be glad
to see that bit of pci interface cleaned up. Any changes needed
other than the pci.txt doc update?
Ummm... What Alan's saying is:
1) Whatever driver is trying to shut down from IRQ context
is
* Change kdb invocation key from ^A to ^X^X^X within 3 seconds. ^A is
used by emacs, bash, minicom etc.
Why not Alt-SysRq-D (like Debug) or so?
* Command history. Handle up/down/left/right/delete keys. Each
kdba_io routine is responsible for recognising the arch specific
keys,
Alan Cox writes:
And just how is he going to test it ? Considering he was just
asking if the concept was reasonable I think you are a little out
of order
I can't test every platform when I have to make such changes.
But it always serves to show the port maintainer what the
change was.
On Tue, 8 May 2001, David S. Miller wrote:
That's pretty arrogant that cut and pasting a few lines into some
architecture specific files and reporting the updated patch is too
much to ask.
I'm sorry if you find me arrogant -- that certainly was not my intent. I
did look at the files and
This was the big argument I was running into from sites, well it
isn't standard yet, when it is we'll do something about it. The
larger sites like to avoid updates until absolutely necessary.
Good grief - nothing like planning ahead ... and these large-site
administrators actually accept
On Tue, 8 May 2001, jamal wrote:
Any one wishing to volunteer, please still send your emails in --
we should be ready in a few days from now,
I guess i should have mentioned the IESG is sitting in to approve ECN
as proposed standard in about a week or so.
cheers,
jamal
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On Mon, May 07, 2001 at 09:56:18PM -0400, Eric S. Raymond wrote:
Tom Rini [EMAIL PROTECTED]:
Only sort-of. There are some cases where you can get away with
that. Probably. eg If you ask for PARPORT, on x86 that means yes
to PARPORT_PC, always (right?)
Yes. So the right answer there
jamal writes:
Help is needed to contact these site owners and politely using a standard
email ask them that their site was non-conformant.
Point them to Sally's draft and the fact that ECN is becoming standard
in the next week or so. Also to Jeff's ECN-under-Linux Unofficial
Vendor
Keith,
I have worked on the making md/mm take the width option using BYTESPERWORD.
I will be happy to work on this.
Regards.. Vamsi.
Vamsi Krishna S.
Linux Technology Center,
IBM Software Lab, Bangalore.
Ph: +91 80 5262355 Extn: 3959
Internet: [EMAIL PROTECTED]
Keith Owens [EMAIL PROTECTED]
My point is that its _ok_ for us to check if the page is a dead swap cache
page _without_ the lock since writepage() will recheck again with the page
_locked_. Quoting you two messages back:
But it is important to re-calculate the deadness after getting the lock.
Before, it
On Tue, 8 May 2001, Marcelo Tosatti wrote:
There are two issues which I missed yesterday: we have to get a reference
on the page, mark it clean, drop the locks and then call writepage(). If
the writepage() fails, we'll have to set_page_dirty(page).
We can move the mark it clean into
On Tue, 8 May 2001, David S. Miller wrote:
I believe it would only be prudent to actually send out these messages
starting at the moment ECN is officially standard.
This was the big argument I was running into from sites, well it
isn't standard yet, when it is we'll do something about
Keith,
What would be really great is to add the following item to your wishlist:
* make it possible (it is trivial but a pain to have to do it manually
every time I upgrade to your latest version!) for those extra modules to
be statically linked in. So that one doesn't have to keep these lines
On Tue, 8 May 2001, David S. Miller wrote:
There are several get_unmapped_area() implementations besides the
standard one (search for HAVE_ARCH_UNMAPPED_AREA). Please fix
them up too.
Yep, I know (ia64 and sparc*). But being lazy enough (and being short on
time) I won't do it until I know
Hi ,
I am getting the following log in my kernel trace .
kmem_grow : Called nonatomically from int - size 32
What is the cause for this .??
Looking forward to your reply . As i am not in the mailist list kindly mark
a copy to me when you respond .
Warm Regards
bala
COOL...
We can take a look and see.
On Mon, 7 May 2001, Wilfried Weissmann wrote:
Hi!
I just put my highpoint-tech raid hack on a website:
http://www.rug-rats.org/~wilfried/
So if you want to play around with it you can download it from there +
get a mininum of
On Mon, 7 May 2001, Lorenzo Marcantonio wrote:
On Mon, 7 May 2001, Rob Turk wrote:
Have you ruled out hardware failures? There's been a few isolated reports
That tape drive (Sony SDT-9000, less than 2 years of service) works
perfectly on Windows NT (were it was before) and even on Linux
Richard B. Johnson wrote:
However, PCI to memory copying runs at about 300 megabytes per
second on modern PCs and memory to memory copying runs at over 1,000
megabytes per second. In the future, these speeds will increase.
That would be big expensive modern PCs then. Our clusters of 700MHz
James Bourne wrote:
From the procps man page:
Albert Cahalan [EMAIL PROTECTED] rewrote ps for full
Unix98 and BSD support, along with some ugly hacks for
obsolete and foreign syntax.
Michael K. Johnson [EMAIL PROTECTED] is the current
In article [EMAIL PROTECTED] you wrote:
This is only with kernel 2.4.4; 2.4.2, 2.4.3 and NetBSD boxes are not
affected. It is independent of platform; I've reproduced it at will on a
lowly p75, an athlon, a p3-800 and on a powerbook/PPC.
I have just reproduced that on 2.4.5pre-1. It was only
Hi,
Until three or four weeks ago, I have been running kernel 2.4.2 with no
problems. However, my hard disk now seems to be playing up. In my system log, I
get the following messages.
May 3 08:13:14 kinslayer kernel: hda: dma_intr: error=0x40 {
UncorrectableError }, LBAsect=3790389,
J . A . Magallon wrote:
On 05.07 Helge Hafting wrote:
!0 is 1. !(anything else) is 0. It is zero and one, not
zero and non-zero. So a !! construction gives zero if you have
zero, and one if you had anything else. There's no doubt about it.
Isn't this asking for trouble with
This one has puzzled me for more than a year. Occasionally a machine
(This time a Compaq EPa PIII 665MHz running 2.4.0, inside XFree86 4.0.3
i810E) almost freezes for no appearent reason. Symptom: when hitting the
caps lock or num lock key the LED on the keyboard responds only after
a substancial
Hi,
I've read recently about union-mount but couldn't find how to do that.
Puropose: bootfloppy is romfs, additiomnanal tmpfs should allow to add
e.g. files to /etc (or modify), link/symlink entries to /bin /(from /mount/bin
for example) etc.
TIA
-mirabilos
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After a clean compile the module ide-mod.o seems to be missing a symbol,
this problem didn't exist in 2.4.4
root@spike:~# depmod -ae 2.4.5-pre1
depmod: *** Unresolved symbols in
/lib/modules/2.4.5-pre1/kernel/drivers/ide/ide-mod.o
depmod: invalidate_device_R25a4b0b2
Complete config is
so there's still single copy for write() of a mmap()ed page?
An mmap page will go direct to disk. But mmap() isnt a good model for
streaming I/O.
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More majordomo info at
If anybody has such a beast, please try this kernel patch _and_ running
the F0 0F bug-producing program (search for it on the 'net - it must be
One apparent problem with this implementation
+ *
+ * This verifies that the fault happens in kernel space
+ * (error_code 4) ==
On Mon, May 07, 2001 at 05:01:03PM -0500, Sean Jones wrote:
In compiling 2.4.4-ac5 for my SPARCStation 20, I had an error in the
compile resulting from the inability to find a hw_irq.h in the
include/asm directory. Do you know where I may be able to find such a
file?
You don't. I discussed
On Tue, 8 May 2001 11:07:38 +0200,
Ben Castricum [EMAIL PROTECTED] wrote:
root@spike:~# depmod -ae 2.4.5-pre1
depmod: *** Unresolved symbols in
/lib/modules/2.4.5-pre1/kernel/drivers/ide/ide-mod.o
depmod: invalidate_device_R25a4b0b2
Try http://www.tux.org/lkml/#s8-8
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On Mon, 7 May 2001, David S. Miller wrote:
My patch is crap and can cause corruptions, there is not argument
about it now :-)
is it the only bug in the swap handling?
or why is this bug triggered so heavily if the swap is on a filesystem?
I had oopses when I used a swapfile on a partition, but
On Mon, 7 May 2001, Brian Gerst wrote:
Keep in mind that regs-eflags could be from user space, and could have
some undesirable flags set. That's why I did a test/sti instead of
reloading eflags. Plus my patch leaves interrupts disabled for the
minimum time possible.
The plain popf
struct ifreq has a member called ifr_data. It is a pointer. You can
put a pointer to any of your data, including the most complex structure
you might envision, in that area. This allows you to pass anything
to and from your module. This pointer can be properly dereferenced
in kernel space
OK, second attempt, I got no replies the first time...
Hi.
I patched 2.4.3 to 2.4.4 with the following commands:
cd /usr/src
cp -r linux-2.4.3 linux-2.4.4
ln -s linux-2.4.4 linux
cd linux
mv ../patch-2.4.4 .
patch -p1 patch-2.4.4
When I compiled bzImage (using .config from
On Tue, 8 May 2001, Hen, Shmulik wrote:
struct ifreq has a member called ifr_data. It is a pointer. You can
put a pointer to any of your data, including the most complex structure
you might envision, in that area. This allows you to pass anything
to and from your module. This pointer can
Grover, Andrew [EMAIL PROTECTED] writes:
[...]
- It's probably easier to put the event file in proc, instead of
dev. This is what the acpi interface does, and eliminates the mknod
step.
Is this kernel policy? I mean, you could apply the same argument to
all device nodes ;-)
- perhaps
On Mon, 7 May 2001, Richard B. Johnson wrote:
Basically, no copy is an academic exercise. It makes the first
packet get sent more quickly, after which everything slows to
the natural bandwidth of the system.
If you used a server for multicast-only. In other words, you
just spewed out
What arch are you compiling for? i386?
When I compiled bzImage (using .config from 2.2.3) I got the following
errors:
Did you run one of the make config commands before building the kernel? You
may need to do this to flush the changes from arch/*/config.in into .config.
David
-
To
Greetings,
While running a ktrace enabled kernel (IKD), I noticed many useless
context switches. The problem is that we continually pester kswapd/
kflushd at times when they can't do anything other than go back to
sleep. As you'll see below, we do this quite a bit under heavy load.
Before:
Correcting the obvious error
#include linux/toshiba.h
still leaves:
toshiba.c:93: parse error before string constant
toshiba.c:93: warning: type defaults to `int' in declaration of `MODULE_PARM'
toshiba.c:93: warning: function declaration isn't a prototype
toshiba.c:93: warning: data
Alan Cox wrote:
But Alan's point is a good one. There are _lots_ of cases you can't get away
with things like this, unless you get very fine grained. In fact, it would
be much eaiser to do this seperately from the kernel. Ie another,
There are also a lot of config options that are
In 2.4.3pre6, code in page_alloc.c:__alloc_pages(), changed from;
try_to_free_pages(gfp_mask);
wakeup_bdflush();
if (!order)
goto try_again;
to
try_to_free_pages(gfp_mask);
wakeup_bdflush();
goto try_again;
This introduced
Hi! ... In a Linux Kernel ...
What can I do to test the FD limit? ... Because, the FD limit is set in
/proc/sys/fs/file-max, sample:
echo 2048 /proc/sys/fs/file-max
ulimit -n 8192
In this case ... the FD limit = 8192 :( ... when the limit should be
2048?
I wrote a perl script for the test
Joel Beach [EMAIL PROTECTED]:
Hi,
Until three or four weeks ago, I have been running kernel 2.4.2 with no
problems. However, my hard disk now seems to be playing up. In my system log, I
get the following messages.
May 3 08:13:14 kinslayer kernel: hda: dma_intr: error=0x40 {
A couple of concerns I have:
* How to pin or pagelock the application buffer without
making a kernel transition.
You need to pin them in advance. And pinning pages is _expensive_ so you dont
want to keep pinning/unpinning pages
* Assuming the memory can be locked down, how can a list
of
Hi,
Sorry for breaking the thread, but I only read l-k through www archives,
so...
This problem is fixed in CVS. Apply:
http://vger.samba.org/cgi-bin/cvsweb/linux/net/ipv6/ndisc.c.diff?r1=1.49r2=1.50cvsroot=vger
And you'll be fine.
Please Cc: if follow-ups.
--8--
In article [EMAIL
One addtional wish list entry:
'ss' and especially 'ssb' could print the new value of the overwritten
register/memory address in each line, perhaps both the old and new
value.
--
Manfred
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On Tue, 8 May 2001 15:32:47 +0200,
Manfred Spraul [EMAIL PROTECTED] wrote:
One addtional wish list entry:
'ss' and especially 'ssb' could print the new value of the overwritten
register/memory address in each line, perhaps both the old and new
value.
I don't need new wishlist entries, I need
I have tried this approach too a couple of years ago. I came to the idea
that I want some kind of event reporting mechanism to know when
application faults and when other events (like I/O) occurs. Booting is
just the tip of the iceberg. MOST big apps are seeking on startup because
a) their
This fixes corruption with MAP_SHARED on top of nfs filesystem in 2.4:
--- 2.4.5pre1aa2/fs/nfs/write.c.~1~ Tue May 1 19:35:29 2001
+++ 2.4.5pre1aa2/fs/nfs/write.c Tue May 8 02:04:15 2001
@@ -1533,6 +1533,7 @@
if (!inode file)
inode = file-f_dentry-d_inode;
+
lsof will tell you what files are open and what applications are using
them.
joelja
On Tue, 8 May 2001, Dennis Bjorklund wrote:
Is there a way in linux to montior file writes?
I have something that is writing to the disk every 5:th second (approx.)
And I don't know what it is.. In windows
Federico Edelman Anaya ([EMAIL PROTECTED]) wrote:
What can I do to test the FD limit? ... Because, the FD limit is set in
/proc/sys/fs/file-max, sample:
echo 2048 /proc/sys/fs/file-max
That sets the systemwide limit to 2048.
ulimit -n 8192
That sets the per-process limit (for
Dan:
Hi ...
Dan Kegel wrote:
Federico Edelman Anaya ([EMAIL PROTECTED]) wrote:
What can I do to test the FD limit? ... Because, the FD limit is set in
/proc/sys/fs/file-max, sample:
echo 2048 /proc/sys/fs/file-max
That sets the systemwide limit to 2048.
Ok ...
ulimit -n
Hi folks!
(I have looked up in the archive the linux-kernel threads for kwds
DMA, contiguous, address before writing this mail, and read the
corresponding threads.)
I am trying to port some driver to Linux2.4/i386. I have just read
the Linux device drivers book by A.Rubini, and this is what
On Tue, May 08, 2001 at 10:03:23AM +, Federico Edelman Anaya wrote:
What can I do to test the FD limit? ... Because, the FD limit is set in
/proc/sys/fs/file-max, sample:
echo 2048 /proc/sys/fs/file-max
ulimit -n 8192
In this case ... the FD limit = 8192 :( ... when the limit should
Hi,
we run a nfs server utilizing 2.2.19 + ReiserFS version 3.5.32 on a
P 3 550 machine. Disk subsystem is a GDT7518RN using 4 UW disks as raid 5
device. After upgrading from 2.2.17 + reiserfs to 2.2.19 we experience
many (very much more than with 2.2.17) problems with our nfs clients
about 12
The real fix is to measure fragmentation and the progress of kswapd, but
that is too drastic for 2.4.x.
I suspect the real fix might, in general, be
a) to reduce use of kmalloc() etc. which gives
physically contiguous memory, where virtually
contiguous memory will do (and is,
Many thanks Jim. Now at least I have a way.
But I caution others that Linux modifies the UDF filesystem somehow, so that Winders
can no longer understand it. I nearly lost all my music photo archives to this.
And attempts to rm or mv on a DVDRAM with UDF cause it to segfault jam up.
On Tue, May 08, 2001 at 12:48:25PM +1000, Peter Waltenberg wrote:
We have a RAID 5 system thats had 2 of 6 disks in the RAID go into thermal
shutdown. (Air-con failure).
The disks are functional, but the RAID won't restart because the superblock
timestamps on those two disks are now out of
== Andrea Arcangeli [EMAIL PROTECTED] writes:
This fixes corruption with MAP_SHARED on top of nfs filesystem
in 2.4:
--- 2.4.5pre1aa2/fs/nfs/write.c.~1~ Tue May 1 19:35:29 2001
+++ 2.4.5pre1aa2/fs/nfs/write.c Tue May 8 02:04:15 2001
@@ -1533,6 +1533,7 @@
To make sure this gets enough publicity and eyes on it..
-
The Linux Standard Base is in the final stages of the LSB written
specification for Linux. The workgroup has published the LSB v0.9 written
specification, and is undergoing a thirty day Request For Comments from
the
On Tue, May 08, 2001 at 05:21:02PM +0200, Trond Myklebust wrote:
Could you instead detail exactly which corruption problem you are
trying to fix?
int fd = open (name, O_RDWR);
char* adr = (char*) mmap (0, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
/* write to *adr through *(ard+len-1) */
On 4 May 2001, Eric W. Biederman wrote:
The example that sticks out in my head is we rely on the MP table to
tell us if the local apic is in pic_mode or in virtual wire mode.
When all we really have to do is ask it.
You can't. IMCR is write-only and may involve chipset-specific
Alan Cox wrote:
so there's still single copy for write() of a mmap()ed page?
An mmap page will go direct to disk.
Looking at the 2.4.4 code, mmap() of file followed by write() to socket
will copy the data once.
I could be mistaken (only glanced at the code quickly) but I base that
on the
On Mon, 7 May 2001 21:47:33 -0400 (EDT), Adam [EMAIL PROTECTED] wrote:
So I'm wondering, is there a way, kind of like relink system call which
coule take existing file descriptor (they are still so the fd is there,
just unlinked) and link it back to file name?
POSIX' fattach(int fd, const char
On Tue, 8 May 2001, Alan Cox wrote:
I dont see where the alternative patch ensures the user didnt flip the
direction flag for one
Yeah.
We might as well just make it eflags IF, none of the other flags
should matter (or we explicitly want them cleared).
Linus
-
To
The log is:
Apr 15 20:58:27 hydra kernel: UDF-fs INFO UDF 0.9.1 (2000/02/29) Mounting
volume 'UDF Volume', timestamp 2001/03/02 11:55 (1e98)
At the very least, run 0.9.3 from sourceforce (or the cvs version) and
see if it works any better.
Ben
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To unsubscribe from this list: send the line
At first, thanks for the (unexpected large) discussion and hints!
Second: sorry for the multimedia-centric viewpoint, but i think
it's an important task for future operating systems development
(or better: for a real world OS like linux) to have sophisticated
support for a _large diversity_ in
Hi!
My ide flash card used to work in 2.4.0, but does not work in
2.4.4. Everything compiled in (no modules)
May 8 13:43:44 bug cardmgr[58]: initializing socket 0
May 8 13:43:44 bug cardmgr[58]: socket 0: ATA/IDE Fixed Disk
May 8 13:43:44 bug cardmgr[58]: module //pcmcia/ide_cs.o not
Hi!
2.4.[123] changed name of ide-cs module, which means your pcmcia setup
breaks... This is how to undo the damage. Works for me, do *not* apply
into anything official.
Pavel
--- clean/drivers/ide/ide-cs.c Sun Apr 1 00:23:29
On Tue, May 08 2001, Ben Fennema wrote:
The log is:
Apr 15 20:58:27 hydra kernel: UDF-fs INFO UDF 0.9.1 (2000/02/29) Mounting
volume 'UDF Volume', timestamp 2001/03/02 11:55 (1e98)
At the very least, run 0.9.3 from sourceforce (or the cvs version) and
see if it works any better.
I was
Why did not you take care of the request_region() call and just disabled it?
The ports will be considered free by the system, and another device might
grab them later on!
Vassilii
-Original Message-
From: Pavel Machek [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 08, 2001 8:14 AM
To:
Thanks, I'll try it. Didn't get the prior response.
--
C.
The best way out is always through.
- Robert Frost A Servant to Servants, 1914
Jens Axboe wrote:
On Tue, May 08 2001, Ben Fennema wrote:
The log is:
Apr 15 20:58:27 hydra kernel: UDF-fs INFO UDF 0.9.1 (2000/02/29)
Why did not you take care of the request_region() call and just disabled it?
The ports will be considered free by the system, and another device might
grab them later on!
Because it was one of changes between 2.4.0 and 2.4.4. Ignore that.
Hi,
I'm using kernel 2.4.4 cvs from SGI, with xfs. I'm getting this Oops:
kernel: Unable to handle kernel NULL pointer dereference at virtual address 0010
kernel: printing eip:
kernel: c017bfd8
kernel: *pde =
kernel: Oops:
kernel: CPU:0
kernel: EIP:
I have been encountering the following problem for quite a while now
(in 2.4 pre kernels, and 2.4.x final kernels), and from what I have
been able to determine, it has affected people since 2.3.4x or so,
and is also affecting 2.2.17 and above.
The problem is that once in a while (which varies
On Tue, May 08, 2001 at 04:29:37PM +0100, Alan Cox wrote:
To make sure this gets enough publicity and eyes on it..
http://www.linuxbase.org/spec/lsbreview.html
Yes. Lots of tiny inaccuracies. And no email address.
(But a form with the mysterious button Change.)
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Hi!
Can this new UDF driver do cd-rewriting ?
Em Ter 08 Mai 2001 14:50, Jens Axboe escreveu:
On Tue, May 08 2001, Ben Fennema wrote:
The log is:
Apr 15 20:58:27 hydra kernel: UDF-fs INFO UDF 0.9.1 (2000/02/29)
Mounting volume 'UDF Volume', timestamp 2001/03/02 11:55 (1e98)
At
On Tue, 8 May 2001, Mark Hemment wrote:
In 2.4.3pre6, code in page_alloc.c:__alloc_pages(), changed from;
try_to_free_pages(gfp_mask);
wakeup_bdflush();
if (!order)
goto try_again;
to
try_to_free_pages(gfp_mask);
wakeup_bdflush();
On Tue, May 08 2001, Thiago Vinhas de Moraes wrote:
Hi!
Can this new UDF driver do cd-rewriting ?
No not in itself, but you can give the pktcdvd module a shot. It can do
rw CD-RW mount so far, at least.
*.kernel.org/pub/linux/kernel/people/axboe/packet/
There's a packet-writing mailing
On Tue, May 08 2001, Marcelo Tosatti wrote:
The attached patch (against 2.4.5-pre1) fixes the looping symptom, by
adding a counter and looping only twice for non-zero order allocations.
Looks good. (actually Rik had a patch similar to this which fixed a real
case with cdda2wav just like
To driver wizards:
I have a driver which needs to wait for some hardware.
Basically, it needs to have some code added to the run-queue
so it can get some CPU time even though it's not being called.
It needs to get some CPU time which can be turned on or
turned off as a result of an interrupt
[EMAIL PROTECTED] said:
A couple of concerns I have:
* How to pin or pagelock the application buffer without
making a kernel transition.
You need to pin them in advance. And pinning pages is _expensive_ so you dont
want to keep pinning/unpinning pages
I can't convince myself why this
Hi,
I was just wondering how bad the current way of writing out dirty pages is
wrt multiple page_launder() users.
We don't remove a dirty page from the inactive dirty list when writing it
out (as opposed to direct page-buffers ll_rw_block() IO).
When we have multiple users inside
I've been seeing these for a while now (2.4.4 - =2.4.2) also coincidental
with a change to XFree86 X 4.0.3 from MetroX in the time frame. Am not sure
exactly when they started but was wondering if they were significant. It
seems some app is trying to delete or modify something. On console and
On Tue, May 08 2001, Richard B. Johnson wrote:
To driver wizards:
I have a driver which needs to wait for some hardware.
Basically, it needs to have some code added to the run-queue
so it can get some CPU time even though it's not being called.
It needs to get some CPU time which can
On Tue, May 08 2001, Richard B. Johnson wrote:
Use a kernel thread? If you don't need to access user space, context
switches are very cheap.
So, what am I supposed to do to add a piece of driver code to the
run queue so it gets scheduled occasionally?
Several, grep for
But in the case of an application which fits in main memory, and
has been running for a while (so all pages are present and
dirty), all you'd really have to do is verify the page tables are
in the proper state and skip the TLB flush, right?
We really
On Tue, 8 May 2001, Jens Axboe wrote:
On Tue, May 08 2001, Richard B. Johnson wrote:
To driver wizards:
I have a driver which needs to wait for some hardware.
Basically, it needs to have some code added to the run-queue
so it can get some CPU time even though it's not being
Hi,
The mmap() call fails when addr is specified, MAP_FIXED is cleared in
flags and no address space can be allocated either at addr or above it.
This is a legal request and it should not fail as long as there is space
available below addr. Following is a patch that fixes the problem.
This
I have a driver which needs to wait for some hardware.
Basically, it needs to have some code added to the run-queue
so it can get some CPU time even though it's not being called.
Wht does it have to wait ? Why cant it just poll and come back next time ?
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a. when a user app wants to receive some data, it allocates
memory(using malloc) and waits for the hw to do zero-copy read. The kernel
does not allocate physical page frames for the entire memory region
allocated. We need to lock the memory (and locking is expensive due to
Ronald Bultje wrote:
On 2001.05.08 01:04:57 +0200 Jesper Juhl wrote:
static inline int sock_rcvlowat(struct sock *sk, int waitall, int len)
{
int r = len;
if (!waitall)
r = min(sk-rcvlowat, len);
return max(1,r);
}
return max(1,
On 7 May 2001, Linus Torvalds wrote:
It has code to do that in smb_revalidate_inode(), but it may be that
something else refreshes the inode size _without_ doing the proper
invalidation checks. Or maybe Urban broke that logic by mistake while
fixing the other one ;)
No, I broke it when
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