definitely not OOT.my comment:
when a task is going to 100% CPU utilizationperhaps u can do a
"echo t > /proc/sysrq-trigger", which immediately can show the CURRENT
stack trace of all task in dmesg (truncated, so look into
/var/log/messages for full dump). "CURRENT" is important, as it i
How about this:
use "top" to confirm which process is the one causing the 100% CPU
utilization? Then enter "echo t > /proc/sysrq-trigger" to generate a
stack trace dump of all the kernel threads. It should overflow your
dmesg buffer, so look into /var/log/messages for the complete trace.
And i
ED,
Can you just tell how to use this script for searching efficiently. I tried
like :
script.sh task_struct.
Anything more if you want to add in this.
Krishna
On Wed, Sep 9, 2009 at 7:51 PM, Ed Cashin wrote:
> Deven writes:
>
> > Hi,
> >
> > On Tue, 2009-09-08 at 19:01 +0530, Chandraka
thanks again. ;-)
On Wednesday 09 September 2009 18:15:11 you wrote:
> Hi Mosta...
>
> On Wed, Sep 9, 2009 at 10:51 PM, mosta wrote:
> > hey everyone,
> >
> > is there a difference between kmalloc(size, GFP_KERNEL | GFP_DMA) and
> > bigphysarea_alloc (size). I god a driver that use the bigphysarea
On Wed, 9 Sep 2009, Mulyadi Santosa wrote:
> On Wed, Sep 9, 2009 at 11:04 PM, Robert P. J. Day
> wrote:
> >
> > for various reasons, i skipped a week, but i like to think this
> > week's column -- part 3 of 3 of sequence files -- makes up for it.
> > it hurt to write. make sure you ask question
On Wed, Sep 9, 2009 at 11:04 PM, Robert P. J. Day wrote:
>
> for various reasons, i skipped a week, but i like to think this
> week's column -- part 3 of 3 of sequence files -- makes up for it.
> it hurt to write. make sure you ask questions in the comments
> section.
>
> http://cli.gs/ShyJXz
>
for various reasons, i skipped a week, but i like to think this
week's column -- part 3 of 3 of sequence files -- makes up for it.
it hurt to write. make sure you ask questions in the comments
section.
http://cli.gs/ShyJXz
rday
--
===
Hi Mosta...
On Wed, Sep 9, 2009 at 10:51 PM, mosta wrote:
> hey everyone,
>
> is there a difference between kmalloc(size, GFP_KERNEL | GFP_DMA) and
> bigphysarea_alloc (size). I god a driver that use the bigphysarea patch and I
> changed it to use kmalloc (because for my kernel version there is no
hey everyone,
is there a difference between kmalloc(size, GFP_KERNEL | GFP_DMA) and
bigphysarea_alloc (size). I god a driver that use the bigphysarea patch and I
changed it to use kmalloc (because for my kernel version there is no patch)
and it worked. So my question is, is the bigphysarea patc
Chandrakant Kumar wrote:
> Hello
>
> I'm a computer science student . I am studying operating systems in the
> current semester , so i got a chance to study about linux. I want to
> learn kernel programming. may you people please tell me what materials
> and books i should go through. please provid
Deven writes:
> Hi,
>
> On Tue, 2009-09-08 at 19:01 +0530, Chandrakant Kumar wrote:
>> Hello
>>
>> I'm a computer science student . I am studying operating systems in the
>> current semester , so i got a chance to study about linux. I want to
>> learn kernel programming. may you people please te
On 09 Sep 2009, at 3:47 PM, Mulyadi Santosa wrote:
Hi Jason...
On Wed, Sep 9, 2009 at 3:39 PM, Jason Nymble
wrote:
Hi,
Background: We use a custom kernel driver module for our PCIe
device which
processes bulk data between the host and the card. The card issues
MSI
interrupts at up to 2
Hi Jason...
On Wed, Sep 9, 2009 at 3:39 PM, Jason Nymble wrote:
> Hi,
>
> Background: We use a custom kernel driver module for our PCIe device which
> processes bulk data between the host and the card. The card issues MSI
> interrupts at up to 20kHz to the host, and the driver interrupt routine
>
On Wed, Sep 9, 2009 at 5:13 PM, Leonidas . wrote:
> Why there is no realloc in kernel?
> Any specific reason?
>
> Regards,
> Sandeep.
>
May be because it is not guaranteed that you will be able to allocate
more than a page of kernel memory contiguously, you may need to be
explicitly aware of the li
Why there is no realloc in kernel?
Any specific reason?
Regards,
Sandeep.
Hi,
Background: We use a custom kernel driver module for our PCIe device
which processes bulk data between the host and the card. The card
issues MSI interrupts at up to 20kHz to the host, and the driver
interrupt routine essentially just calls tasklet_schedule() and
returns IRQ_HANDLED,
Hi ,
I have an use-case where i need to reserve high volume memory
buffer - (Video buffer) and it has to be shared between user-space and
kernel space. Please help me how to we achieve this using "/dev/pmem" device
?
When registering platform device - PMEM device, we are supplying base
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