On Tue, 09 Sep 2014 17:46:33 +0530, Sudip Mukherjee said:
No new udev rule is needed.
If you truly understood the point of task 5, this is all the clue you need
to fix it. And that's all the hint I'm giving on this one. :)
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On Tue, 09 Sep 2014 07:58:49 -, Rajat Jain said:
Can someone tell me if the i386 one is to be used when we want to build for a
32bit machine and the x86_64 is to be used for 64 bit machine?
I wouldn't run either one on an actual machine. Defconfigs are *example*
configs, only useful as a
On Tue, 09 Sep 2014 08:22:59 -0400, nick said:
This patch is wrong, checkpatch errors. I am attaching another fixed version.
*yawn* You still didn't even fix the typos in comments.
Not Worth The Effort To Review.
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On Tue, 09 Sep 2014 16:19:54 +0200, Paul Bolle said:
(I remember seeing tutorials that show you how to generate a .config
from scratch. I wonder whether anyone actually does that.
Distros did that originally. Now they just keep delta'ing their
known-working config. The pain involved was part
On Tue, 09 Sep 2014 16:06:07 +0200, Matthias Brugger said:
Can someone tell me if the i386 one is to be used when we want to build for
a 32bit machine and the x86_64 is to be used for 64 bit machine?
You can build the kernel with any architecture for any architecture.
This is called
On Tue, 09 Sep 2014 20:14:48 +0530, Jeshwanth Kumar N K said:
If you have any doubt please ask little only, he will reply for sure.
Better not to ask questions in public mailing list.
Which is why I gave a cryptic answer that's totally correct, and yet
makes no sense unless you already
On Tue, 09 Sep 2014 18:53:55 +0530, Manavendra Nath Manav said:
Why is it so? Why can't kernel mode code handle the page fault and reload
the page from swap? Also, can page fault occur when kernel is executing in
process context and/or interrupt context?
There's no inherent chiseled-in-stone
On Tue, 09 Sep 2014 11:52:20 -0400, Nick Krause said:
I understand that , sorry Guys. I am going to fix this later including
my spell checks.
Don't bother.
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On Tue, 09 Sep 2014 17:16:19 -0400, nick said:
I am sending this in again fixed and working.
Typos are still there, and zero explanation of how you verified
fixed and working, which given your track record of failing to
even compile test your code is a *big* show-stopper.
If you don't care
On Tue, 09 Sep 2014 21:21:18 -0400, nick said:
Not going to execute, I wasn't sure if that statement needs to be executed.
skb = dev_alloc_skb(frag_length + 4);
+ if (skb == NULL) {
+ skb_queue_purge(priv-rtllib-skbwaitQ[TXCMD_QUEUE];
+
On Tue, 09 Sep 2014 22:56:10 -0400, nick said:
OK. It's official. I see *zero* possibility that you'll ever manage to
write an acceptable patch. This is *still* wrong.
Care to explain.
No. Please go figure it out for yourself.
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On Tue, 09 Sep 2014 23:53:50 -0400, nick said:
Build Error. Fixed it. I need to really check my patches first :(.
How many times have you done that now?
In addition, I want you to forget about and not reply to any patches
you known I haven't build tested.
No, it doesn't work like that. Each
On Wed, 10 Sep 2014 14:45:23 +0530, Manavendra Nath Manav said:
But if the total RAM is limited (less than 896MB LOWMEM), for example as in
embedded devices how the kernel code be kept in RAM all the time. Am I
correct to assume that the kernel pre-fetches all pages when entering
kernel mode
On Wed, 10 Sep 2014 20:26:48 +0300, Ran Shalit said:
What is usually the criterion for PM (power management) suspending
that application shall use ? Is it according to minimum threshold for
cpu load (as indication for no process) ?
That will be highly application dependent. Something that
On Wed, 10 Sep 2014 21:23:28 +0300, Ran Shalit said:
As far as I understand, suspend/respond PM is not per device, but for
all system,
and wakeup source will resume again the whole system.
I think you mean runtime suspend/resume in the answer.
The original question didn't specify. You said
On Wed, 10 Sep 2014 21:58:48 +0300, Ran Shalit said:
1. How can I make a process to notice this inactivity ? Do you think
it can be implemented by some periodic process who check if there is
activity ? It returns to the original question I raised, that I will
use some periodic process who
On Thu, 11 Sep 2014 16:13:58 +0200, testlaster said:
The first line didn't work because I seem to not have a build directory
there.
Hopefully, that /usr/src/linux-headers directory is an exact match for
the kernel you're planning to use the module in.
make[2]: *** No rule to make target
On Mon, 15 Sep 2014 10:38:58 -0400, Nick Krause said:
After issues with the community I am wondering how to improve my rep
and help out more.
Quite frankly, I'd suggest going and spending a year or two helping
another open source project.
I will start out with check patch but if there is
On Mon, 15 Sep 2014 11:22:52 -0400, Nick Krause said:
I am sure I can help. Seems I need to be more careful with my patches.
It also seems you are *unable* to be more careful with your patches, because
you've been told to do so on multiple occasions by multiple people.
Nick - face it. You've
On Mon, 15 Sep 2014 15:13:42 -0600, Jake Campbell said:
Is there any other challenges out there similar to Eudyptula that Nick
could follow instead since he was kicked out?
The vast majority of such things have a must be able to follow the
rules and guidelines requirement, so I fear Nick may
On Tue, 16 Sep 2014 08:44:27 -0400, nick said:
I am attaching two check patch patches I wrote in the last few days as I am
unable to get a reply
from the maintainers. Would someone please send them off for me.
I am attaching. Fail 3 words in.
That's why you aren't getting a reply from the
On Tue, 16 Sep 2014 11:57:35 -0400, Lidza Louina said:
Use this guide: http://kernelnewbies.org/OPWfirstpatch
It's a tutorial that shows you how to setup and send patches.
Don't bother.
He's been pointed at that at least once a week for the past two months,
and everybody from me to Greg KH
On Tue, 16 Sep 2014 13:12:32 -0400, Nick Krause said:
I am going to resend my patch and see if it's good
Why bother? We already *know* it won't be.
You could amaze and astound us all by seeing if it's good *before* you hit send.
But I'm not holding my breath.
and if not I am going to leave
On Tue, 16 Sep 2014 13:28:06 -0400, Rik van Riel said:
-BEGIN PGP SIGNED MESSAGE-
On 09/16/2014 01:12 PM, Nick Krause wrote:
I am going to resend my patch and see if it's good and if not I am
going to leave for a while.
You may want to consider fixing them, by applying the advice
On Tue, 16 Sep 2014 17:23:05 -0400, nick said:
I checked this patch and there seems to be issues that any of you have stated
before after not applying or grammar e.t.c.
If there seem to be issues, why did you bother posting it?
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In general, stand-alone patches to fix checkpatch whining are a Bad Idea(TM).
Here's why...
First off, the type of programmer who is tempted to do checkpatch cleanup
as My First Kernel Patch are, by and large, novices.
The code in the kernel falls into one of several states of use and
On Tue, 16 Sep 2014 20:35:35 -0500, Greg Donald said:
fs/* currently contains 96,375 errors and 22,555 warnings.
[/usr/src/linux-next] find fs -type f -name '*.[ch]' | xargs cat | wc -l
1138557
96K errors seemed to be a tad high. So.. doublechecking..
[/usr/src/linux-next] for i in `find
On Wed, 17 Sep 2014 08:09:36 -0400, nick said:
On 14-09-17 08:05 AM, Greg Freemyer wrote:
I don't know that chunk of code, but error messages that go to the kernel
log exist for a specific reason. Taking them out requires a specific
reason.
Ie. This would make a good commit message
On Wed, 17 Sep 2014 08:02:01 -0400, nick said:
it off , if not I would like to known exactly where I am wrong so I can learn.
Somebody wake me up when he actually *means* that.
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On Thu, 18 Sep 2014 06:39:01 -0400, nick said:
I am trying to run xfs tests on a partion at /dev/sdc1 but the scripts state
that the drive is not at $TEST_DIR and if '
it's on that directory they abort after fsck. Does anybody known how to fix
this please.
It can probably be fixed by
On Thu, 18 Sep 2014 22:19:40 +0800, Kinka Huang said:
In file included from drivers/gpu/drm/nouveau/core/core/client.c:29:0:
drivers/gpu/drm/nouveau/core/include/nvif/unpack.h:1:1: error: expected
identifier or ( before . token
../../../nvif/unpack.h
Your tree is somehow corrupted.
On Fri, 19 Sep 2014 09:28:03 +0800, Kinka Huang said:
@valdis, I am doing that on a laptop. I try to get back the file by
deleting unpack.h and checkout, but the same content remains. And `git
That's weird indeed.
status` or `git log` doesn't show any changes of file unpack.h . One
On Wed, 24 Sep 2014 21:03:01 +0900, ì í said:
And you should be careful about obtained IP address, because it is made by
IP spoofing attack or some sort of IP camo technique.
He's looking at the IP address of the interface, not the source IP
address of the packet.
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On Wed, 24 Sep 2014 10:26:13 +0200, Ivan Grimaldi said:
I have a custom board based on Freescale i.MX6DL, and at start time i
received a JFFS2 deadlock.
My kernel version is v3.14.19
Looks like this one has been around for a while - it was
reported against 3.10 and 3.0.18:
On Wed, 24 Sep 2014 10:19:34 +0530, Maninder Singh said:
Hi,
Each time a packet arrives at a router in a subnet during transit, I
need to determine the IP address of the incoming interface of the
router for that packet.
What problem are you trying to solve using the IP address of the
On Wed, 24 Sep 2014 11:12:55 -0400, El Mouatez Billah Karbab said:
I am student in Concordia university Montreal, and I have a course about
network security. The professor of this course wants us to do a project in
both the field of security research with some practical application, and I
On Wed, 24 Sep 2014 10:08:29 -0400, John de la Garza said:
why not look at the destination ip of the ip header?
It's possible to receive a packet on the wrong interface.
For instance, we have a software package installed here that
insists on talking on one IP address, so we end up with this
On Thu, 25 Sep 2014 10:49:33 +0530, Arjun Pandey said:
Step 1 goes through fine. The module gets compiled fine.
However now when i try to compile the kernel i get linker error of
undefined reference to the function exported from the kernel module.
I can't find any documentation on this
On Fri, 26 Sep 2014 10:35:57 -0700, Anand Moon said:
One more question, if the change belong to single file
and we are fixing multiple issue we need to different commit
for each changes. And then club them into patch series.
Each patch should do exactly one thing. So if you find 3 different
On Sun, 28 Sep 2014 16:27:06 +0530, me storage said:
I am new to Linux Kernel Programming .I want to develop usb drivers so i
read LDD3 Chapter 14. i didn't find /sbin/hotplug in Ubuntu 12.04.And my
LDD3 is about a 2.6.10 kernel. Ubuntu 12.04 shipped a 3.2.14 kernel.
% git diff --shortstat
On Tue, 30 Sep 2014 02:53:05 +0530, Ssagarr Patil said:
Is there any benchmarking tool to test read/write speed on Linux and which
works on ARM ?
This is always a hairy problem. Do you care about the memory speed of the
DIMM, or the actual *effective* memory speed? They can be very
On Wed, 01 Oct 2014 01:32:19 +0530, Ssagarr Patil said:
May be a tool is needed at uboot level to test the speeds.
What will that actually *tell* you though? Or more to the point,
what *actionable* information will that give you? The cache speeds
and memory speeds are something you're stuck
On Thu, 09 Oct 2014 21:28:23 +0300, Ran Shalit said:
Does anybody know what is the minimum expected time for sleep period
with the cpuidle ?
Both processor dependent and sleep level dependent. There's a certain
amount of latency induced by the hardware waking up.
Look at
On Sat, 11 Oct 2014 14:52:40 +0100, Hugo Mills said:
On Sat, Oct 11, 2014 at 09:44:05AM -0400, nick wrote:
Thank you for your help, I'll study the code and see what I can do
about it. Do you have any suggestions of how to fix this checkpatch
warning?
Ignore it. The checker has clearly
On Sun, 12 Oct 2014 22:31:12 -0400, nick said:
Valdis,
I do understand your concern with me finding one of the few false positives,
due to my issues already with the community. I am trying my best now to
improve
and work toward good,solid work that is of actual use to the community and
On Mon, 13 Oct 2014 13:04:08 +0800, sizel said:
I remove the audit and selinux from kernel and start the new kernel in
Centos, but i can't bring up the network device, Why?
This would be a lot easier to answer if you gave us some actual details:
1) Why did you think audit and selinux were the
On Tue, 14 Oct 2014 04:12:47 +0200, Grzegorz Dwornicki said:
Is there a good documentation on how messages are taking the tour from User
calling read/write on socket fd, to kernel handling the actual
send/receive functions? I wish to write code to capture the messages (no
netfilter - I wish
On Thu, 16 Oct 2014 14:09:05 +0200, Nev Ikte said:
I've tried to reproduce it with a single client
and basically, if ep_poll() is able to find an event or the timeout is 0,
the latency is down to 5usec, otherwise if it enters the waitqueue
the latency goes up to 10-25usec, which impact the
On Thu, 23 Oct 2014 00:26:32 +0900, J.Hwan Kim said:
Hi, everyone
In my system, NMI intrrupt counter is increased continuously,
which I found in /proc/interrupts.
How can I find the reasons of NMI interrupts?
How fast are they increasing? A few an hour? A few a minute?
50 or 60 a second?
On Thu, 23 Oct 2014 10:47:57 +0900, J.Hwan Kim said:
How fast are they increasing? A few an hour? A few a minute?
once per second...
I bet 'cat /proc/sys/kernel/nmi_watchdog' returns '1'.
See Documentation/lockup-watchdogs.txt
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On Thu, 23 Oct 2014 19:43:07 -0700, Hei Chan said:
Then, I found that recvmmsg() doesn't return all the packets that queued in 1
single call.
You want to receive *all* of them? Call recv() with a *buf and a len
big enough to get a *lot* of msgs, and pass MSG_ALL in the flags.
Why were you
On Fri, 24 Oct 2014 15:09:45 +0200, Peter Senna Tschudin said:
This was edited in 2010, but the original is more than 9 years old,
and still there are some drivers using virt_to_bus() and
bus_to_virt().
-- // --
All drivers should be using these interfaces with no exceptions. It
is planned
On Thu, 23 Oct 2014 23:41:41 -0400, valdis.kletni...@vt.edu said:
Why were you expecting recvmsg() to return more than one message?
Bah. Ignore that. you said recvmmsg() with *two* m's.
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On Sun, 26 Oct 2014 12:01:05 -0400, John de la Garza said:
On Sun, Oct 26, 2014 at 09:25:01AM +0100, Peter Senna Tschudin wrote:
Sorry for the noise.
$ make allyesconfig drivers/staging/rtl8723au/
does the trick.
that seems like overkill, why not just enable the
On Mon, 27 Oct 2014 18:15:15 +0530, Er Krishna said:
1. In case of Paging and discontiguous memory allocation for a particular
process, is it possible that all the segments say DS, SS, CS, Heap and all
can be in different page frames. I am asking this for a particular segment
(I know all the
On Tue, 28 Oct 2014 12:39:17 -0500, Greg Donald said:
The WARNING line over 80 characters currently accounts for 216K of
the total violations. IMHO checkpatch should just stop complaining
about the 80 char limit since that's the main offender causing new
On the other hand, there's very good
On Wed, 29 Oct 2014 12:16:57 -0500, Jaime Arrocha said:
Lastly, what about this other book?
The Design of the UNIX Operating System by Maurice Bach
That book is about the SYSV kernel. However, both it, and McKusic's
book on the BSD kernel, are good because they demonstrate different
On Mon, 20 Oct 2014 09:17:50 -, el_es said:
Maybe better to introduce a standard clear marker that
able people just respond with, to alikes of nick:
REJECTED-by: Name address@email.server
We already do something like this.
You'll on occasion see 'Nacked-By: ...' go by when a kernel
On Sun, 02 Nov 2014 19:57:44 +0530, mind entropy said:
In the copy_from_user when the user passes the virtual address is
the address mapped in the kernel page tables?
Actually, a large part of the reason for copy_from_user()'s existence is
to deal with the possibility that the page is *not*
On Mon, 03 Nov 2014 21:00:13 +0200, Kevin Wilson said:
The strong server, on which I intend to build, has about 4 time more
CPU power than the NFS server.
Actually, CPU doesn't matter as much as I/O capability. You don't believe
me, try building a kernel with a cache-cold source tree, and
On Tue, 04 Nov 2014 13:07:47 +0530, Chanchal Paul said:
I am fairly new to kernel compilation and installation process, still i
managed to learn from Kernelnewbies and RT-wiki and managed to patch
3.12.14 vanilla kernel with rt patch 3.14.12.
You *really* want to get the correct patch on the
On Fri, 07 Nov 2014 23:49:35 +0800, Dave Tian said:
Latest kernel provides a TCP SYN Cookie feature to defense from SYN flooding.
If by latest you mean since Andi Kleen submitted a patch for 2.1.44,
back in July 1997
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On Fri, 07 Nov 2014 23:11:26 +0530, Puneet Agarwal said:
I use linux kernel 2.6. I have enabled SYN cookies already. But that does not
seem to solve the problem. Overall request latency is very high with these
many
half open connections.
So, out of curiosity, where are all these half open
On Mon, 10 Nov 2014 19:24:59 +0530, mohanty bhagaban said:
How to get access to mainn kenel code repository through git as I need to
add some patches for reviews.Where can i get the bramch to submit my code
for review.
git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
On Wed, 12 Nov 2014 18:39:08 +0530, lokesh kumar said:
Hi,
Sorry i forgot to change subject line :(
Note that for people that use mail software that supports threading, even
changing the subject line may not be sufficient - there's another E_mail
header. For this note, it says:
References:
On Thu, 13 Nov 2014 10:02:42 -0500, Nick Krause said:
I am willing to start out completely fresh and willing to learn how to
do this correctly now and hopefully improve my rep ... slowly.
This is not another email for me trying to state again I am willing
to change,
That's odd, that's what
On Tue, 18 Nov 2014 20:54:05 +0530, somebody said:
- I could go with a virtual machine on one of my main machines â But I'm
not
quite sure whether the hardware-abstraction will give me troubles when
hacking on hardware drivers (which I want to start with)
If you're hacking at hardware
On Wed, 19 Nov 2014 09:43:54 +0530, Varun Sharma said:
1. At time of skb allocation sk-sk_prot-max_header value is 272 .
If we add tcp header+ip header+mac header outcome will always less
than 272 .Then why allocate more ? Is it for future case ?
Did you remember to do the calculation for
On Wed, 19 Nov 2014 18:43:26 -0800, Greg KH said:
I think you are doing something wrong, unless you are changing a
configuration option, version of gcc, or are changing a .h file that all
files include.
Actually, that reminds me of a patch I probably need to polish up and
make git bisect a
On Sun, 23 Nov 2014 16:25:11 +0800, åå»ºå¸ said:
I found there's many files with same name in kernel.
e.g:
include/asm/linkage.h
arch/x86/include/asm/linkage.h
I know when compile for x86, kbuild will use x86 linkage.h.
The secret is in the -I include directives - it will search for
On Mon, 24 Nov 2014 22:58:08 +0530, Anshuman Aggarwal said:
prevents it from directly recognized by file system code . I was
wondering if Split RAID block devices can be made to be unaware to the
RAID scheme on top and be fully mountable and usable without the raid
drivers (of course
On Fri, 05 Dec 2014 17:50:40 +0800, åå»ºå¸ said:
I am confused by `leal -__PAGE_OFFSET(%ecx),%esp`.
`pa(stack_start)` have convert `stack_start` to physicall address.
why we need `-__PAGE_OFFSET(%ecx)` instead of `%ecx`?
From the commit message:
This retains start_stack as a virtual
On Sun, 07 Dec 2014 22:15:13 -0500, nick said:
Greetings Fellow Developers,
I have finally learned my lesson as you can tell from my newest patches being
accepted or considered in good form.
Right now,all I'm seeing in linux-next from you is 2 patches that
remove FIXME comments. Given your
On Mon, 08 Dec 2014 14:05:45 -0700, Dean Michael Ancajas said:
Hi,
I have submitted single line patches. I was wondering what is the
policy on the # of changes per patch? For instance the code below:
if (Index) {
data = ft1000_read_reg(dev, FT1000_REG_MAG_DPDATAL);
On Tue, 09 Dec 2014 06:33:07 -0500, nick said:
I understand that now after reading your message.
Sorry Nick. You might believe that, but nobody else does at this point. We've
heard that over and over for the last six months, and then you follow up with
behavior that indisputably proves that you
On Tue, 09 Dec 2014 22:18:48 -0200, Lucas Tanure said:
This command:
$ lsmod | grep -Eo '^[^ ]+' | sed 1d | xargs modinfo | grep filename
Note that only finds stuff that's been built with CONFIG_FOOMOD=m, Modules
that were built into the kernel with =y won't show on an lsmod. On my laptop
On Thu, 11 Dec 2014 09:37:26 -0500, nick said:
I send Dave, what I feel is the bad commit for the current lockups found in
kernel 3.18 r4. The bad commit I believe is
4995ab9cf512e9a6cc07dfd6b1d4e2fc48ce7fef
as it does touch the TLB code in the function that is most likely causing
issues.
On Thu, 11 Dec 2014 20:48:38 +0530, p.rameshb...@globaledgesoft.com said:
How can I change the kernel version from 3.12 to 3.5.0.45-generic?
First, figure out *why* you need to do that. There's probably a better
solution.
Whether I need to download the source code for 3.5.0.45-generic and I
On Thu, 11 Dec 2014 15:33:40 -0500, Andrej Manduch said:
It looks like `lspci -k` is what you want.
Which only works for PCI cards, not for USB, I2C, SPI, or other bus
devices that you may have...
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On Mon, 15 Dec 2014 10:01:54 -0800, Greg KH said:
On Mon, Dec 15, 2014 at 11:59:27AM -0600, Chris wrote:
That's what I thought Greg but wanted to make sure. AFAIK I'm not having
any hardware related issues but I would like to know what the 'Hangcheck
timer' is. Possibly you can enlighten
On Mon, 15 Dec 2014 14:19:32 -0600, Chris said:
On Mon, 2014-12-15 at 13:43 -0500, valdis.kletni...@vt.edu wrote:
I'm pretty sure that's a timer for the i915 driver that detects if the
GPU has gone into an infinite loop due to (usually) buggy programming from
the operating system
On Mon, 15 Dec 2014 15:17:32 -0600, Chris said:
I believe I understand Valdis, what kind of actions would need to be
taken to track this down, if it's possible, or to simply fix the problem
once and for all?
The assumption is this problem is only one problem. At last count, there's
been like
On Wed, 17 Dec 2014 00:39:40 +0330, Ali Aminian said:
I am wondering how should i install proprietary drivers on mainline
kernel. I have NVIDIA Corporation G98M [GeForce 9300M GS] graphic
chipset and Broadcom Corporation BCM4312 network adapter. in Broadcom
case the driver source is available
On Thu, 18 Dec 2014 00:04:48 +0530, karthik nayak said:
//.* {fprintf(yyout, /*%s*/, yytext + 2);}
This fails to fix block comments:
// this is line one
// this is line two
// this is line three
to
/*
* THis is line one
* This is line two
* this is line three
*/
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On Wed, 17 Dec 2014 19:10:24 +, karthik nayak said:
The only reason I didn't do that is cause the file is too large to
manually have a look at, even the diff tends to be very huge.
[/usr/src/linux-next] grep '//' drivers/staging/rtl8192u/r8192U_dm.c | wc -l
373
And why use lex when sed is
On Sat, 20 Dec 2014 20:57:40 +0100, Paul Bolle said:
On Sat, 2014-12-20 at 20:47 +0330, Ali Aminian wrote:
it worked.
Good.
I just insmod modules you listed and it worked.
It's odd that modprobe failed here.
Not really.
Most likely cause - failure to run depmod after putting new
On Tue, 23 Dec 2014 16:59:05 +0800, lx said:
I think we should delete the NIC from the poll list by:
list_del(napi-poll_list);
Why?
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On Mon, 29 Dec 2014 11:32:22 +0200, Kevin Wilson said:
The module_init() method has one call to pr_info(Hello world!\n).
However, when I run insmod helloWorld.ko I get TWO messages in the
kernel log and not one, as I expected:
..
Dec 29 11:24:40 kv kernel: [67479.245642] Hello world!
Dec
On Fri, 02 Jan 2015 07:50:55 +0530, me storage said:
Can any one please tell me difference between kernal space user space in
code perspective
Two biggies:
1) Kernel space pages are usually nailed down and not paging in and out,
this is *not* true for userspace pages (so special tap-dancing
On Mon, 02 Feb 2015 15:24:37 -0600, riya khanna said:
Hi,
I'm writing a device driver to to provide a wrapper device around a
real device. Is it acceptable to do the following:
wrapper_dev_open(flags) {
// do additional bookkeeping
real_dev_filp = filp_open(real_device_node_path,
On Mon, 02 Feb 2015 17:50:43 -0600, riya khanna said:
The purpose of multiplexing is to either block undesired
events/operations on devices (e.g. input, graphics) or respond to the
applications based on the in-memory state of device instances.
Those who don't remember the history of filtering
On Sat, 07 Feb 2015 01:57:44 +0530, noyb noybee said:
I need the path lookup data as I need to specifically block inode
loopkups originating from a certain path
Then just make sure the inodes you don't want accessed aren't in the
namespace.
Hint: from a certain path is almost guaranteed to be
On Sat, 07 Feb 2015 07:27:13 +0530, noyb noybee said:
I am trying to enhance the security features of the chroot jail(I
know it wasn't built for the purpose). I am trying to prevent access
to files outside the jail unless they specify a specific
The right thing to do is design the jail so it
On Tue, 03 Feb 2015 09:34:31 -0600, riya khanna said:
(e.g. evdev) and mediate accesses in user space through ioctl. For
example, if a container is in the background (i.e. user not
interacting with it), then all inputs should be blocked to it, but if
it becomes active again inputs must be
On Wed, 04 Feb 2015 16:23:26 +0900, manty kuma said:
I would like to know the mount target for a given directory. In kernel, is
there an API to get the information?
Explain what problem you're trying to solve. Your example:
/system/bin is a directory its mount partition is /system.
isn't very
On Thu, 15 Jan 2015 18:57:20 +0300, Meyer Lansky said:
if (hardirq_count())
               per_cpu(cpu_hardirq_time, cpu) +Þlta;
else if (in_serving_softirq() !(curr-flags PF_KSOFTIRQD))
               per_cpu(cpu_softirq_time, cpu) +Þlta;
question: tell me
On Sun, 18 Jan 2015 23:49:31 +, Thomas F. J.-M. Pasquier said:
I am trying to build a skeleton LSM module, but I am not having much luck
so far. The problem seems to be that the LSM init function is never called.
What does 'modprobe' report? Anything in dmesg?
pgpnfYCRtihDf.pgp
On Sun, 18 Jan 2015 15:03:55 +0530, Siddhartha De said:
Let's say you need to call an ioctl from a shell script ( I know its a
very rare use case but please bear with me ... :) )
There's a *reason* it's very rare...
So the current way of doing it is probably to write a C program which
On Sat, 17 Jan 2015 23:28:18 -0500, nick said:
Greetings Kernel Developers,
After pulling the latest kernel commits for Linusâs tree, I am
getting a build failure with make cscope. Below is the error
messages.
find: unknown predicate `--cc'
I am unsure of why I am getting this and if this
On Thu, 12 Feb 2015 00:31:45 +0530, noyb noybee said:
I was planning that the calling process would call the new system call
which would return a pseudo-random key that is used as the
pass-phrase.
So what prevents malicious code from doing a fork and then calling the
new syscall to get its
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