Hi David,
9 jul 2008 kl. 15.05 skrev David Woodhouse:
It is in fact identical. Disassembly with the tools found on
sourceforge
was fun, since they have endianness bugs, don't recognise the 'JMP'
which was the first instruction, and need each 3-byte instruction in
the
binary to be prefixed
From previous posting, Mulyadi mentioned that page mapping in
ZONE_NORMAL being the default mapping. So my questions are these:
If default mapping (via cr3/pgd mechanism) is ZONE_NORMAL, then how do
we allocate memory in the ZONE_HIGHMEM region? (ie, does
__get_free_pages() or alloc_pages()
Hi...
On Thu, Jul 10, 2008 at 3:02 PM, Peter Teoh [EMAIL PROTECTED] wrote:
From previous posting, Mulyadi mentioned that page mapping in
ZONE_NORMAL being the default mapping.
I think better wording is: pages are taken from ZONE_NORMAL, if no
flags like GFP_HIGHMEM isn't mentioned.
So my
On Thu, 2008-07-10 at 09:38 +0200, Fredrik Noring wrote:
Hi David,
9 jul 2008 kl. 15.05 skrev David Woodhouse:
It is in fact identical. Disassembly with the tools found on
sourceforge
was fun, since they have endianness bugs, don't recognise the 'JMP'
which was the first instruction,
I have tried with GFP_HIGHUSER and I am able to allocate 1M buffers of 24
bytes.
But, it is not solving my purpose as it is coming from high memory and I
need to map it from ZONE_HIGHMEM to ZONE_NORMAL before using.
I want to know why this panic is coming if I am giving GFP_KERNEL ?
1) May be
Hi ,
I am Vikram. Am a newbie to kernel stuff. I learn a lot about kernel
development and stuff but don't really know the working design of kernel. I
would like to reverse engineer the kernel source code and teach myself the
memory diagrams and kernel development. Could somebody please help me
On Thursday 10 July 2008 14:44:13 Vikram_Upparpalli wrote:
Hi ,
I am Vikram. Am a newbie to kernel stuff. I learn a lot about kernel
development and stuff but don't really know the working design of kernel. I
would like to reverse engineer the kernel source code and teach myself the
memory
Just a suggestion:
I believe I'm in the same boat as yourself - trying to learn about the
Linux Kernel.
I've been perusing the source code as well, but what I realized I was
lacking was an understanding of Operating Systems in general.
So another option to consider - it's certainly helping me -
Thank you Mulyadi,
On 7/10/08, Mulyadi Santosa [EMAIL PROTECTED] wrote:
If default mapping (via cr3/pgd mechanism) is ZONE_NORMAL, then how do
we allocate memory in the ZONE_HIGHMEM region? (ie, does
__get_free_pages() or alloc_pages() return us anything in those
region?)
Hi Kyle;
On Thu, 2008-07-10 at 11:10 -0400, Kyle Spaans wrote:
Just a suggestion:
I believe I'm in the same boat as yourself - trying to learn about the
Linux Kernel.
I've been perusing the source code as well, but what I realized I was
lacking was an understanding of Operating Systems in
On Thu, 2008-07-10 at 11:59 -0400, William Case wrote:
Hi Kyle;
On Thu, 2008-07-10 at 11:10 -0400, Kyle Spaans wrote:
Just a suggestion:
I believe I'm in the same boat as yourself - trying to learn about the
Linux Kernel.
I've been perusing the source code as well, but what I
On Thursday 10 July 2008 17:37:19 you wrote:
Have you downloaded the kernelsource? and, why would you want to
reverse-engineer it? You have the source.. :-)
I am looking for the memory layouts... and figure out the operation based
on the memory diagrams... :) donno the exact word.
On Thu, Jul 10, 2008 at 9:29 PM, William Case [EMAIL PROTECTED] wrote:
Hi Kyle;
On Thu, 2008-07-10 at 11:10 -0400, Kyle Spaans wrote:
Just a suggestion:
I believe I'm in the same boat as yourself - trying to learn about the
Linux Kernel.
I've been perusing the source code as well,
Hi Wolfram;
On Thu, 2008-07-10 at 18:52 +0200, Wolfram Sang wrote:
Hi William,
On Thu, Jul 10, 2008 at 10:49:23AM -0400, William Case wrote:
The tables often have pointers to each other in order to build
up a full process. Some of the most important tables are; the
Hi, (already posted this on KVM devel list)
I'd like to know what happens when the KVM guest kernel or process in the
guest tries to get timing information. For example if a userspace
process in the guest calls nanotime(), getnanotime() or gettimeofday()
functions, then where is the time info
Sorry Pranav; I cited the wrong book;
On Thu, 2008-07-10 at 13:32 -0400, William Case wrote:
Hi Pranav;
On Thu, 2008-07-10 at 22:22 +0530, Pranav Peshwe wrote:
On Thu, Jul 10, 2008 at 9:29 PM, William Case [EMAIL PROTECTED]
wrote:
[snip]
The book that gave me the most assistance, was
On Thu, Jul 10, 2008 at 06:14:13PM +0530, Vikram_Upparpalli wrote:
Please send me a suitable document
http://lwn.net/Kernel/LDD3/
Also, books like Linux Kernel Development by Robert Love should be
able to give you general ideas how things work. They may be not 100% up
to date, but still good to
On Thu, Jul 10, 2008 at 01:18:38PM -0400, William Case wrote:
No, I am not ignoring the importance of code. But, it seems to me, if a
programmer has the right table in mind, he can get to it and follow the
requisites of the hardware and the code from there. Put another way,
tables seem to
Hi William,
On Thu, Jul 10, 2008 at 10:49:23AM -0400, William Case wrote:
The tables often have pointers to each other in order to build
up a full process. Some of the most important tables are; the
inode, the file descriptor, the socket, the process, the
On Thu, 10 Jul 2008 10:49:23 -0400
William Case [EMAIL PROTECTED] wrote:
The kernel is basically a set of tables (C struct) that are used
to transform human type info into machine usable data.
No.
The kernel is basically a shared library with special privileges,
meaning it
Hi all,
In message queue implementation, where exactly the messages are stored.
Process A stores data in MQ-1, and Process B retrieves messages from
MQ-1.
Is message queue is implemented as shared memory or with any other
technique.
If any one let know the URL where the internals
Hi Vikram,
Thanks for the reply. Just wanted to know, when the message is queued,
where exactly it is located?..
Is it in the kernel stack of a process, or in shared memory ?... Not
sure exactly where it is stored?
yes, Kernel Gurus can help us to get more clarity. ;).
Regards,
-Jelari-
Hi!
On Thu, Jul 10, 2008 at 10:51 PM, Peter Teoh [EMAIL PROTECTED] wrote:
Ok, to summarize:
1. __get_free_pages(GFP_HIGHMEM, order)--- it will be from ZONE_HIGHMEM
2. Or alloc_pages(GFP_HIGHMEM, order).
3. After these just kmap() them to get the virtual address, right?
Yeah...so
Hi...
On Fri, Jul 11, 2008 at 12:55 AM, Arn [EMAIL PROTECTED] wrote:
Hi, (already posted this on KVM devel list)
I'd like to know what happens when the KVM guest kernel or process in the
guest tries to get timing information. For example if a userspace
process in the guest calls nanotime(),
is there any API exists to check if the message is arrived in the
message queue, rather than
retrieving the message?.. Checking the existence of the message should
not remove the message
from message queue. !
-Jelari-
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