ter interrupts
enabled again, i.e. all interrupt except one are missed by core,
Thanks,
Chetan Nanda
>
> specially when the irq
> affinity has been set to the same core on which the
> above mentioned code (disabling / enabling the irq's)
> runs?
> How the linux deals with this ki
On 15-Mar-2016 7:19 pm, "Cihangir Akturk" <cakt...@gmail.com> wrote:
>
> On Thu, Mar 10, 2016 at 02:59:31PM +0530, Chetan Nanda wrote:
> > Hi,
> >
> > As per book (Linux kernel development)
> >
> > "Whoever locked a mutex must unlo
ss context and
unlocking from separate context (work context) and it is allowed
without any error from kernel.
Is it the mutex user responsibility to keep track of it? Ideally
mutex_unlock should check if owner is same as current?
Thanks,
Ch
d idea.
Thanks,
Chetan Nanda
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On Tue, Aug 18, 2015 at 3:16 PM, amit mehta gmate.a...@gmail.com wrote:
Hello All,
This query is not about Linux kernel, but is rather generic query on
development framework with git. Since, Linux Kernel project is
significantly large, with astonishing number of people involved and
large
in 'Documentation/filesystems/nfs/nfsroot.txt'
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~Chetan Nanda
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~ Chetan Nanda
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issues like
- In buffers allocations, is the buffer used for to-device DMA is
physically contiguous?
- Caching issue, buffer should be un-cacheable.
- Any other programming error.
- Chetan Nanda
Regards,
Ayan Kumar Halder
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On Fri, Aug 15, 2014 at 4:19 PM, Paul Bolle pebo...@tiscali.nl wrote:
On Thu, 2014-08-14 at 09:38 -0400, Valdis Kletnieks wrote:
On Thu, 14 Aug 2014 16:46:22 +0530, Chetan Nanda said:
I am trying to enable 'CONFIG_DEBUG_SET_MODULE_RONX' config option on
3.10 kernel (for ARM arch) via writing
On Mon, Jul 21, 2014 at 9:52 AM, Greg KH g...@kroah.com wrote:
On Mon, Jul 21, 2014 at 09:09:02AM +0530, Chetan Nanda wrote:
I try to debug the hang when unloading of driver. I am using kernel v3.10
and it hangs in 'wait_for_zero_refcount'.
I checked that this function has been removed
On Fri, Jul 18, 2014 at 9:47 AM, Greg KH g...@kroah.com wrote:
On Fri, Jul 18, 2014 at 09:43:48AM +0530, Chetan Nanda wrote:
On Wed, Jul 16, 2014 at 9:51 PM, Greg KH g...@kroah.com wrote:
On Wed, Jul 16, 2014 at 08:57:38PM +0530, Chetan Nanda wrote
On Wed, Jul 16, 2014 at 9:51 PM, Greg KH g...@kroah.com wrote:
On Wed, Jul 16, 2014 at 08:57:38PM +0530, Chetan Nanda wrote:
On Wed, Jul 16, 2014 at 8:49 PM, Chetan Nanda chetanna...@gmail.com
wrote:
On Wed, Jul 16, 2014 at 6:39 PM, John de la Garza j...@jjdev.com
wrote
,
Chetan Nanda
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On Wed, Jul 16, 2014 at 8:49 PM, Chetan Nanda chetanna...@gmail.com wrote:
On Wed, Jul 16, 2014 at 6:39 PM, John de la Garza j...@jjdev.com wrote:
On Wed, Jul 16, 2014 at 04:00:18PM +0530, Chetan Nanda wrote:
A depends on B, so B is automatically loaded when A is loaded.
B module is also
On Mar 11, 2014 7:57 AM, Matt Davis mattdav...@gmail.com wrote:
I have a kernel module that communicates to a PCI device via DMA. The
module allocates the shared memory using dma_alloc_coherent(). When
the module is unloaded, a call to dma_free_coherent() is executed.
My question is, since
Hi,
Is there a way to load and unload a module from another module?
I know 'request_module' can be used to load but what is the API for
unloading a module.
Thanks for your help.
Thanks,
Chetan Nanda
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On Tue, Jan 14, 2014 at 12:38 PM, Le Tan tamlokv...@gmail.com wrote:
Thanks very much! I will try that later. What you mentioned is another
amazing sight. But I am confused that why it can't work if I export a
function from my module and call it in the kvm? Do I have to modify the
makefile of
,
Chetan Nanda
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$?') printed?
echo $? show 1 (EPERM? most probably, operation not permitted for common
module).
BTW, why are you using the '-v' option when invoking modprobe
programatically?
yes, -v option can be removed (behaviour is same even after removing -v
option)
-mandeep
Thanks,
Chetan Nanda
Yes, current-mm points to user space context for the current process.
Now for a kernel threads there is no user space context and for them
current-mm would be NULL.
Thanks,
Chetan Nanda
On Fri, Nov 15, 2013 at 9:54 PM, Paul Davies C pauldavi...@gmail.comwrote:
Hi,
I happen to find
You may attach debugger (like Lauterbach) and use its data breakpoint
functionality.
Thanks,
Chetan Nanda
On Fri, Nov 8, 2013 at 6:16 AM, Rajat Jain rajatj...@juniper.net wrote:
Hi folks,
I have a memory location (One of the fields in a kernel data structure)
and I want to track down
.
Thanks,
Chetan Nanda
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controller. And I2C core is
containing some common code (routines) being used by both I2C client (I2C
devices) driver and I2C adapter (controller) driver.
Thanks,
Chetan Nanda
Thanks
--
Regards
Jeshwanth Kumar N K
Bangalore, India
On Mon, Feb 11, 2013 at 5:25 PM, anish singh anish198519851...@gmail.comwrote:
On Mon, Feb 11, 2013 at 4:51 PM, पारस bepa...@gmail.com wrote:
Hi All,
To read/write data to user-space from kernel-space we use
copy_from_user()
and copy_to_user() functions.
What is the use of these
/kernelnewbies
Chetan Nanda
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On Oct 17, 2012 2:22 PM, Kshemendra KP kshemen...@suphalaam.com wrote:
On Wed, Oct 17, 2012 at 2:04 PM, Chetan Nanda chetanna...@gmail.com
wrote:
On Tue, Oct 16, 2012 at 5:47 PM, Kshemendra KP kshemen...@suphalaam.com
wrote:
On x86 kernel is normally split into 3GB (user) : 1 GB
On May 31, 2012 9:37 PM, Abu Rasheda rcpilot2...@gmail.com wrote:
On Wed, May 30, 2012 at 10:35 PM, Mulyadi Santosa
mulyadi.sant...@gmail.com wrote:
Hi...
On Thu, May 31, 2012 at 4:44 AM, Abu Rasheda rcpilot2...@gmail.com
wrote:
as I increase size of buffer, insns per cycle keep
On Wed, May 9, 2012 at 5:40 AM, Fredrick fjohn...@zoho.com wrote:
Hi,
I need to convert a user virtual address to its
corresponding physical address.
I know that if the virtual address is from kernel,
we could use virt_to_phys.
Is there a similar helper function
to convert user virtual
.
Strangely wringing a single log message in the kernel ring-buffer cost
around 6-8ms.
Please help to confirm this, or we are doing something wrong.
Thanks,
Chetan Nanda
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On May 3, 2012 8:37 PM, 夏业添 summer...@gmail.com wrote:
Hi,
I want to use workqueue in my irq handler. Some materials say that I can
use
INIT_WORK( work, function, data );
to initialize work, whose type is struct work_struct, and data is
something should be passed to function.
however,
On Mar 9, 2012 11:57 PM, Mulyadi Santosa mulyadi.sant...@gmail.com
wrote:
Hi :)
On Fri, Mar 9, 2012 at 18:39, Daniel Hilst danielhi...@gmail.com wrote:
The processes that appear in top with brackets are the kernel threads?
Yup :)
If so, this threads spend all its time on system mode,
Hi,
AFAIK imx036 is a raw bayer camera, and would be outputting data on mipi
data line.
So one needs a dedicated hardware such as mipi rx and then Isp etc.. And i
dont think drivers for these would be available in linux. I might be wrong
...
On Mar 5, 2012 2:18 PM, Prabhakar Lad prab
Mayank,
for sharing.
Autif
Hi Autif,
Please go through the link:
http://lwn.net/Articles/119652/
Problem with my dummy driver was that i am using unlocked_ioctl, but
defined the ioctl function with wrong syntax (i.e. with syntax of normal
ioctl function.)
Thanks,
Chetan Nanda
On Tue, Dec 27, 2011
On 12/27/11, Alexandru Juncu alex.ju...@rosedu.org wrote:
On Tue, Dec 27, 2011 at 1:57 PM, Chetan Nanda chetanna...@gmail.com wrote:
On Tue, Dec 27, 2011 at 5:23 PM, Alexandru Juncu alex.ju...@rosedu.org
wrote:
On Tue, Dec 27, 2011 at 1:39 PM, Chetan Nanda chetanna...@gmail.com
wrote:
Hi
);
..
In kernel space
int readHwReg_ioctl(struct inode *node, struct file *filp, unsigned int
cmd, unsigned long arg)
{
...
printk(\n%d %s cmd = %x\n,__LINE__,__FUNCTION__,cmd); --- cmd =
bee6a9d4
...
}
I am not able to figure out the root cause,
Please help to check...
Thanks,
Chetan Nanda
On 7 Oct 2011 16:58, Parmenides mobile.parmeni...@gmail.com wrote:
Hi,
Preemption has two cases: user preemption and kernel preemption. I
have tow questions about them.
1. According to Love, If the kernel is returning to user-space, it
knows it is in a safe quiescent state. In other
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