Dear All,
Where do we find the archives of kernelnewbies of yesteryears ?
Currently, I find only Dec 2010 and Jan 2011.
The archives I refered is
http://lists.kernelnewbies.org/pipermail/kernelnewbies/
Thanks,
Prabhu
___
Better archive is here with thread index and date index.
http://www.spinics.net/lists/newbies/
Anuz: I feel it is good to add this list in the guidelines page.
Regards,
Prabhu
On Thu, Jan 6, 2011 at 5:26 AM, John Mahoney jmaho...@waav.com wrote:
On Wed, Jan 5, 2011 at 6:46 PM,
If you are working on a desktop machine, then the following idea works.
Usually, the VGA compatible controller memory will be mapped to the physical
address space which can be viewed with the help of lspci -vv command. Then
open the device file /dev/mem and mmap with the offset equal to the
By experiment, we can know that all the fields of struct file are copied to
the child.
Here is what it happens.
When fork() is executed,
* A new array of struct file is created for the child.
* All the entries of the fd array of the parent is copied into the new array
of the child.
* Now both the
Dear All,
Can you please let me know the way to find out whether the cache
has been disabled or not on my embedded board.
Regards,
Prabhu
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Apr 2011 2:25:10 pm Prabhu nath wrote:
I understand about Linear virtual address and Physical address. How is
the
logical address generated ? Can you please explain.
Thanks,
Prabhu
On Wed, Apr 20, 2011 at 9:33 PM, mindentropy mindentr...@gmail.com
wrote:
On Wednesday 20 Apr 2011 4
Dear All / Spiro,
I tried setting up KGDB on my machine but somehow I am not finding
my luck for past few months.
Sprio. in his earlier mail had said about his success of setting up
KGDB, Can you please share your notes of how to set up KGDB. If possibe
please share the screen
Can you please help me in doing single stepping, from here.
Thanks,
Prabhu
On Thu, May 12, 2011 at 6:16 AM, Prabhu nath gprabhun...@gmail.com wrote:
Dear All / Spiro,
I tried setting up KGDB on my machine but somehow I am not
finding my luck for past few months.
Sprio
Enabling CONFIG_DEBUG_RODATA also didn't work.
-Prabhu
On Thu, May 19, 2011 at 6:45 AM, Dongdong Deng libfet...@gmail.com wrote:
On Wed, May 18, 2011 at 7:23 PM, Prabhu nath gprabhun...@gmail.com
wrote:
Dear All,
There is a problem with the KGDB at the very first break point
, May 20, 2011 at 12:23 PM, Prabhu nath gprabhun...@gmail.com
wrote:
Enabling CONFIG_DEBUG_RODATA also didn't work.
I am sorry, the CONFIG_DEBUG_RODATA should be disabled...
Could you try to pass full parameters to kgdboc module?
kgdboc=ttyS0,115200 kgdbwait
Dongdong
-Prabhu
Dear All,
Disabling O2 and Os on Kernel building, I am getting the
following error. Can you please help me in debugging this.
Saw some info on the net, but could not resolve it.
ERROR: intel_gmbus_is_forced_bit [drivers/gpu/drm/i915/i915.ko] undefined!
ERROR: __udivdi3
Please see inline.
On Mon, Jun 27, 2011 at 2:42 PM, piyush moghe pmker...@gmail.com wrote:
I have very basic some question's related to HighMem Memory Mapping:
1) Why can't we directly map memory in highmemory?
This question is incorrect ? Typically on a intel architecture, the
I have one question in this context. Should we disable optimization when
building the kernel when we wish to enable kgdb or should we leave it
intact.
Thanks,
Prabhunath
On Fri, Jun 24, 2011 at 5:28 PM, Shaji Yusuf shajiyu...@yahoo.com wrote:
Sprio, thanks for the reply!
I root caused the
On Mon, Jun 27, 2011 at 3:58 PM, Paraneetharan Chandrasekaran
paraneethar...@gmail.com wrote:
On 27 June 2011 14:58, Prabhu nath gprabhun...@gmail.com wrote:
Please see inline.
On Mon, Jun 27, 2011 at 2:42 PM, piyush moghe pmker...@gmail.com wrote:
I have very basic some question's
Hi Mulyadi/Spiro,
Can you please help me in partially enabling/disabling
optimizations, because I was consistently hitting at the below problem when
building the kernel after disabling the optimization
ERROR: intel_gmbus_is_forced_bit [drivers/gpu/drm/i915/i915.ko] undefined!
ERROR:
Thanks for your reply. Plz see inline
On Tue, Jul 10, 2012 at 11:17 AM, Philipp Ittershagen
p.ittersha...@googlemail.com wrote:
Hi Prabhu,
On Tue, Jul 10, 2012 at 6:56 AM, Prabhu nath gprabhun...@gmail.com
wrote:
For E.g. I have a device whose physical address range is 0x80008000
Thanks for your reply. Plz see inline
On Tue, Jul 10, 2012 at 11:50 AM, Dave Hylands dhyla...@gmail.com wrote:
Hi Prabhu,
On Mon, Jul 9, 2012 at 9:56 PM, Prabhu nath gprabhun...@gmail.com wrote:
Dear All,
Is it possible to map a physical address of a device
Wonderful. I liked it. Please see inline
On Tue, Jul 10, 2012 at 7:37 PM, 弋天 卜 bu...@live.cn wrote:
在 2012-7-10，12:58，Prabhu nath gprabhun...@gmail.com
gprabhun...@gmail.com 写道：
Dear All,
Is it possible to map a physical address of a device to
a known Kernel virtual
On Tue, Jul 10, 2012 at 10:03 PM, 弋天 卜 bu...@live.cn wrote:
在 2012-7-10，17:16，Prabhu nath gprabhun...@gmail.com
gprabhun...@gmail.com 写道：
Thanks for your reply. Plz see inline
On Tue, Jul 10, 2012 at 11:17 AM, Philipp Ittershagen
p.ittersha...@googlemail.comp.ittersha...@googlemail.com
Dear All,
I just want to dirty my hands on the display driver. I am just
looking out for the programmer's manual for the Intel 82865GV graphics
controller. I got one but it is of little help.
Request to send me one complete programmer's manual.
Thanks,
Prabhu
Yes, ioremap() maps the given physical address to contiguous Kernel virtual
address above high_memory and returns the first address of the mapped
kernel virtual address.
Regards,
Prabhu
On Thu, Feb 28, 2013 at 4:06 PM, sandeep kumar coolsandyfor...@gmail.comwrote:
Hi All
Please find a
++)
src = readl(tcpm_base+i);
printk(%d\n,src);
printk(Jiffies %x %ld\n\n\n\n, jiffies, jiffies);
}
else
printk(unable to map \n);
Regards,
Prabhu
On Thu, Feb 28, 2013 at 4:41 PM, Prabhu nath gprabhun...@gmail.com wrote:
Yes
Yep.
On Thu, Feb 28, 2013 at 5:10 PM, Yann Droneaud ydrone...@opteya.com wrote:
Le jeudi 28 février 2013 à 16:25 +0530, sandeep kumar a écrit :
Sorry, Neglect the question.
i am using a readl() which reads 4 bytes at a time. In the last
iteration, it is trying to read next 4 unmapped
In the context of tasklets, A tasklet list is headed by tasklet_vec and
tasklet_hi_vec. This is defined per-CPU. U can see this at
http://lxr.linux.no/#linux+v3.8.1/kernel/softirq.c#L400
Regards,
Prabhu
On Sun, Feb 24, 2013 at 2:07 PM, Shraddha Kamat sh200...@gmail.com wrote:
I was reading
In principle, the linker will associate the kernel code/data to the Kernel
virtual address space i.e. between 0xC000_ to 0x_ and
the same linker will associate the Application's code/data to the user
virtual address space i.e. between 0x_ to 0xBFFF_.
Linker itself cannot
On Fri, Mar 1, 2013 at 4:48 PM, sandeep kumar coolsandyfor...@gmail.comwrote:
Hi All
I am using ARM based board.
In mine,
i did the following...
void __iomem *tcpm_base = ioremap_nocache(0x03B0, 10*SZ_3MB);
Actually i didnt reserve the 30MB memory @ 0x3B0. But still the call
is
intentionally gave some physical address which is part of system
memory.
My problem infact is, it is not screwing up. It is allowing me to do that.
Its not 'panic'ing
On Fri, Mar 1, 2013 at 4:58 PM, Prabhu nath gprabhun...@gmail.com wrote:
On Fri, Mar 1, 2013 at 4:48 PM, sandeep kumar
Looks like they have added a new section GNU_RELRO in the later versions.
The one you are referring is read-only section. It would be nice if you
share the section header table.
Plz see inline
Regards,
Prabhunath G
Linux Trainer
Bangalore
On Thu, Mar 7, 2013 at 3:31 PM, Jacky
and not allow the program to write into
READONLY area.
Regards,
Prabhunath G
Linux Trainer
Bangalore
At 2013-03-07 18:53:46,Prabhu nath gprabhun...@gmail.com wrote:
Looks like they have added a new section GNU_RELRO in the later versions.
The one you are referring is read-only section. It would
I guess we should not mix mutex and condition variable. Both have their own
respective semantics.
*mutex* is used to serialize access to a shared resource among competing
threads.
*condition variable* is used to notify a* state change* of a resource to
the interested thread.
In case of condition
On Sun, Mar 10, 2013 at 11:30 PM, Christoph Seitz c.se...@tu-bs.de wrote:
Hi all,
I have some problems allocation Memory the right way and use it in my
kernel module.
I use a char device for reading and writing from/to a pcie dma card.
Especially the read function makes me some headache.
kmem_cache_alloc() is used to allocate a memory object from a respective
cache.
Can you elaborate on what is ur objective or can you get us how you have
invoked this function.
To my understanding kmem_cache_alloc() will just return a linear virtual
address (void *) of a memory object.
It would
On Tue, Mar 12, 2013 at 7:59 PM, valdis.kletni...@vt.edu wrote:
On Tue, 12 Mar 2013 18:38:05 +0530, Prabhu nath said:
On Sun, Mar 10, 2013 at 11:30 PM, Christoph Seitz c.se...@tu-bs.de
wrote:
I use a char device for reading and writing from/to a pcie dma card.
Especially the read
On Wed, Mar 13, 2013 at 9:40 AM, ishare june.tune@gmail.com wrote:
On Tue, Mar 12, 2013 at 06:18:02PM +0530, Prabhu nath wrote:
I guess we should not mix mutex and condition variable. Both have their
own
respective semantics.
*mutex* is used to serialize access to a shared resource
kmem_cache_init() will create generalized caches from where kmalloc() will
allocate memory.
vfs_caches_init() will create specialized caches related to VFS, like,
dentry, inode_cache, mnt_cache
Regards,
Prabhunath G
Linux Trainer
Bangalore
On Fri, Mar 15, 2013 at 10:08 AM, ishare
On Fri, Mar 15, 2013 at 6:08 PM, ishare june.tune@gmail.com wrote:
On Fri, Mar 15, 2013 at 11:39:07AM +0530, Prabhu nath wrote:
kmem_cache_init() will create generalized caches from where kmalloc()
will
allocate memory.
vfs_caches_init() will create specialized caches related to VFS
On Fri, Mar 29, 2013 at 12:45 PM, Jacky jackycli...@163.com wrote:
Hi All,
When mmaping elf image into memory, why offset vma need to subtract
eppnt-p_vaddr as the following code ?
static unsigned long elf_map()
{
...
unsigned long off = eppnt-p_offset -
ELF_PAGEOFFSET(eppnt-p_vaddr) from variable
eppnt-p_offset makes vma map the page-aligned file contents
在 2013-03-29 16:56:29，Prabhu nath gprabhun...@gmail.com 写道：
On Fri, Mar 29, 2013 at 12:45 PM, Jacky jackycli...@163.com wrote:
Hi All,
When mmaping elf image into memory, why offset vma
Is this address (0xB202E7000) a memory address or device address ?. R you
working as privileged user or a normal user. ?
On Fri, Apr 19, 2013 at 11:50 AM, er krishna erkris...@gmail.com wrote:
Hi All,
I am trying to do mmap from user space program to fetch physical memory
base address
Is this is a question that popped up to your mind arbitrarily or do you
have a specific system at hand which triggered you to ponder over the
design of the kernel ? I felt the answer to this question is not straight
forward but is multi faceted and to be discussed in a specific context.
On Sat,
One that I know is through proc interface where the interrupt info is
lodged in a file in /proc and the user code keeps polling on this file.
Exact use of this is to be looked for.
On Tue, May 14, 2013 at 3:24 PM, Gergely Buday gbu...@gmail.com wrote:
Prabhu nath wrote:
But if the device
I think the webpage itself will talk what are the drivers that are
preferred in the user space.
In principle, following are the broad constituents of any device driver.
1. code operating on device registers / device memory / device FIFO
(through device registers)
2. code operating on some data in
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