On Wed, Oct 17, 2012 at 2:04 PM, Chetan Nanda wrote:
>
>
> On Tue, Oct 16, 2012 at 5:47 PM, Kshemendra KP
> wrote:
>
>>
>>On x86 kernel is normally split into 3GB (user) : 1 GB (Kernel)
>> spaces. Kernel can only directly
>>manipulate 1
On x86 kernel is normally split into 3GB (user) : 1 GB (Kernel) spaces.
Kernel can only directly
manipulate 1 GB (around 889 MB) from the PAGE_OFFSET (0xC000). The
user space
memofy below PAGE_OFFSET kernel can't directly access, it considers this
memory as
high memory. Kernel needs
Hi,
When I was looking into consume_skb() routine (net/core/skbuff.c),
there is smp_rmb() read barrier is present.
It is not clear why this is needed here. Basically this routine frees
sk_buff if only one user reference is theere
void consume_skb(struct sk_buff * skb)
{
, Kshemendra KP wrote:
>
> softirqs and tasklets run in interrupt context and must not sleep.
> One cannot use copy_from_user() and copy_to_user() in both of them.
>
>
> Regards
>
> Kshemendra
>
>
>
> On Fri, Oct 5, 2012 at 10:24 AM, devendra.aaru wrote:
>
>
softirqs and tasklets run in interrupt context and must not sleep.
One cannot use copy_from_user() and copy_to_user() in both of them.
Regards
Kshemendra
On Fri, Oct 5, 2012 at 10:24 AM, devendra.aaru wrote:
> On Thu, Oct 4, 2012 at 1:50 PM, Mulyadi Santosa
> wrote:
> > Hi...
> >
> > On Thu
On Thu, Sep 20, 2012 at 10:45 AM, Kshemendra KP wrote:
>
> Hi Amit,
>
>An executin task can be is interrupted by interrupts Timer
> interrupt updates
> all the time related things in the sytem. One of the path where scheduler
> is invoked
> is Timer Softirq. Sc
Hi Amit,
An executin task can be is interrupted by interrupts Timer
interrupt updates
all the time related things in the sytem. One of the path where scheduler
is invoked
is Timer Softirq. Scheduler verifies whether the current executing tasks
time slice
is over, or any other task that has
On Tue, Sep 18, 2012 at 9:32 AM, Amit Gupta wrote:
> Hi All,
>
> I had a question about manipulating process state information in the
> kernel and am curious about the right way to go about it.
> (I'm just messing around with some stuff to try and understand the kernel
> better). I had 2 question
Hi,
Does multi core CPU act like SMP system.
Regards
Kshemendra
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, shubham sharma wrote:
> Hi,
>
> On Thu, Sep 13, 2012 at 12:29 PM, Kshemendra KP
> wrote:
> >
> > In user space when you write beyond your address space (if your write
> > crosses
> > the page boundary alloacted to you), then process is terminated. In the
> >
In user space when you write beyond your address space (if your write
crosses
the page boundary alloacted to you), then process is terminated. In the
kernel
you are still writinng inside the kernel address space. Your write is not
beyond
kernel address space.
Secondly you are corrupting some other
Hi
As the kernel source not available for running kernel code of an
Andodiod tablet,
I could not able to match module_layout address of my loadable module with
the
android tablet running kernel even the kernel versions are same.
Is there a way to generate build environment in such a sit
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