On 03:20 Sat 29 Mar , Robert P. J. Day wrote:
following up on a short article i just read, where is /dev/kmem
these days? was it actually deleted? back in 2005, jon corbet was
certainly hinting at this:
http://lwn.net/Articles/147901/
and i don't see it today on my system, and
On 12:37 Sat 29 Mar , cadetg marco wrote:
Hi KernelNewbies!
Why are shared libraries hold multiple times in memory even if two
processes uses the same libraries?
Are they?
I've made a little test with
firefox and epiphany both are using the same SO --
Srinivas S wrote:
Hi,
A newbie question:
I see that mm_struct has a field start_stack but not end_stack. I
guess that end_stack is located at some constant address for every
process. Is this correct? If so where is this address?
SP (stack pointer) reg always points to the end so there is no
On Fri, Mar 28, 2008 at 10:32 AM, ravikumar
[EMAIL PROTECTED] wrote:
Hi all,
As for every program there will be start function( ie main).
What is the starting function for kerenl process , ie similarly main().
Hi,
I guess it is start_kernel(), this is where the initial kernel command
On Sun, 30 Mar 2008, Erik Mouw wrote:
On Sat, Mar 29, 2008 at 04:03:18AM -0400, Robert P. J. Day wrote:
is there somewhere an actual quantification (is that a word?) to
the benefits of likely() and unlikely() in the kernel code? i've
always been curious about what difference those
True. but I think before start_kernel what comes into picture lies in head.S.
Of course it is arch specific.
Thus the actual start up code is in head.S -
for i386 it is arch/i386/kernel/head.S
for ARM it is arch/arm/kernel/head.S
AFAIK from there onwards control jumps to start_kernel () in
On Thu, Mar 27, 2008 at 10:14:23PM +0800, Peter Teoh wrote:
This is interesting - contrary to what we usually talked about -
UserModeLinux - this is the opposite:
URL: http://web.yl.is.s.u-tokyo.ac.jp/~tosh/kml/
It's a great way to be sure a single error in your userland program
will indeed
http://www.linuxinsight.com/the-little-book-of-semaphores-2nd-edition.html
--
Regards,
Peter Teoh
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Is there any guidelines on when and where can we insert printk() to do
debugging?
From definition of printk() it calls vprintk():
kernel/printk.c:
asmlinkage int vprintk(const char *fmt, va_list args)
{
static int log_level_unknown = 1;
static char printk_buf[1024];
On Sun, Mar 30, 2008 at 5:55 PM, Wu Yu [EMAIL PROTECTED] wrote:
Hi all,
AFAIK, for IA-32 arch, two-level paging is sufficient. But the
positions of PUD and PMD
are kept.
In the book Understanding the Linux Kernel, 3rd, it said that
kernel set the number of
the entries of PUD and
You must also check out the different between kernel address space,
and process address space.
And this:
http://linux-mm.org/LinuxMMDocumentation
Last, personally, I find this posting
http://lkml.org/lkml/2007/10/10/95 (i386 memory init cleanup) very
useful for understanding the codes, as the
Thanks Rik,
On Mon, Mar 31, 2008 at 12:16 AM, Rik van Riel [EMAIL PROTECTED] wrote:
On Sun, 30 Mar 2008 23:24:50 +0800
Peter Teoh [EMAIL PROTECTED] wrote:
Is there any guidelines on when and where can we insert printk() to do
debugging?
You can use it pretty much anywhere.
Ahso
On Mon, Mar 31, 2008 at 12:53 AM, Peter Teoh [EMAIL PROTECTED] wrote:
if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
return 0;
Sorry, forgotten to explain the above - which is extracted from
lock_acquire() - showing that irq must be disabled before it comes
here - right?
--
On 3/30/08, Robert P. J. Day [EMAIL PROTECTED] wrote:
On Sun, 30 Mar 2008, Erik Mouw wrote:
On Sat, Mar 29, 2008 at 04:03:18AM -0400, Robert P. J. Day wrote:
is there somewhere an actual quantification (is that a word?) to
the benefits of likely() and unlikely() in the kernel code?
Mulyadi Santosa wrote:
Hi
On Fri, Mar 28, 2008 at 12:02 PM, ravikumar
[EMAIL PROTECTED] wrote:
Hi all,
As for every program there will be start function( ie main).
What is the starting function for kerenl process , ie similarly main().
other than start_kernel() ... you should be
Hi
On Sun, Mar 30, 2008 at 9:22 PM, Robert P. J. Day [EMAIL PROTECTED] wrote:
i'm sure there's a simple answer to this, but what's the value in
calling mod_timer() to reset a timer to expire at the current value of
jiffies?
$ grep -rw mod_timer.*jiffies) *
Hi..
On Mon, Mar 31, 2008 at 8:42 AM, Peter Teoh [EMAIL PROTECTED] wrote:
The is patch is to enable blktrace debugging in the kernel:
http://lkml.org/lkml/2006/8/1/405
Can anyone provide any guidelines or references on how to use this
feature from userspace? Any tools written to TEST
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