Hi,
I have a kernel module (kernel 2.6) where I have
opened multiple tcp connections. when there is no
data
i want my process to sleep. For that i have added
the
following code.
/* Initialise the wait q head */
init_waitqueue_head(&VNICClientWQHead);
init_waitqueue_entry(&(currentMap->waitQ), current);
add_wait_queue(currentMap->sock->sk->sk_sleep,
&(currentMap->waitQ));
/* here currentMap is a structure containing tcp
conenction info for my module. There is a currentMap
for each tcp connection */
wait_event_interruptible_timeout(VNICClientWQHead,
0, HZ * 100000);
I am not sure about the condition argument, 0.
It is not working. How the condition is to be set
here
so that whenever data is available on any socket
(tcp
connection) the sleeping process gets waken up?
Could anyone please give some light on this?
Regards,
Mano
>
>
>
>
> --- Gaurav Dhiman <[email protected]> wrote:
>
> > On 9/13/05, manomugdha biswas
> > <[email protected]> wrote:
> > > Hi,
> > > I am using the this function in the following
> way:
> >
> > you are using it wrong way ....
> >
> > >
> > > wait_queue_head_t VNICClientWQHead;
> > >
> > > /* Initialise the wait q head */
> > > init_waitqueue_head(&VNICClientWQHead);
> > >
> > > init_waitqueue_entry(&waitQ, current);
> > > add_wait_queue(sock->sk->sk_sleep, waitQ));
> >
> > need not to do this at all, as all this is done by
> > wait_event_interruptible_timepout() function. Just
> > here you initialize
> > the head of the list.
> >
> > >
> > > /*
> > > my code, it reads data from socket
> > > */
> > >
> > >
> wait_event_interruptible_timeout(VNICClientWQHead,
> > 0,
> > > HZ * 100000);
> > >
> > > if no activity is to be done then this process
> > sleeps.
> > > When some data comes in socket i.e socket
> becomes
> > > readable this process should wake up. In kernel
> > 2.4 it
> > > was working fine using
> > interruptible_sleep_on_time().
> > > But it is not working in kernel 2.6 even if data
> > > arrives in socket! The sleeping process never
> wake
> > up.
> > > Could you please tell me what is the problem?
> > >
> > > Regards,
> > > Mano
> > >
> > >
> > > --- Gaurav Dhiman <[email protected]> wrote:
> > >
> > > > On 9/13/05, manomugdha biswas
> > > > <[email protected]> wrote:
> > > > > Hi,
> > > > > I was using interruptible_sleep_on_timeout()
> > in
> > > > kernel
> > > > > 2.4. In kernel 2.6 I have use
> > > > > wait_event_interruptible_timeout. But it is
> > now
> > > > > working!!. interruptible_sleep_on_timeout()
> > was
> > > > > working fine. Could anyone please help me in
> > this
> > > > > regard.
> > > >
> > > > What problem are you facing with
> > > > wait_event_interruptible_timeout() in 2.6
> > > > Elaborate more on it.
> > > >
> > > > -Gaurav
> > > >
> > > > > Regards,
> > > > > Mano
> > > > >
> > > > > Manomugdha Biswas
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
__________________________________________________________
> > > > > Yahoo! India Matrimony: Find your partner
> now.
> > Go
> > > > to http://yahoo.shaadi.com
> > > > > -
> > > > > To unsubscribe from this list: send the line
> > > > "unsubscribe linux-kernel" in
> > > > > the body of a message to
> > [email protected]
> > > > > More majordomo info at
> > > > http://vger.kernel.org/majordomo-info.html
> > > > > Please read the FAQ at
> > http://www.tux.org/lkml/
> > > > >
> > > >
> > > >
> > > > --
> > > > - Gaurav
> > > > my blog: http://lkdp.blogspot.com/
> > > > --
> > > > -
> > > > To unsubscribe from this list: send the line
> > > > "unsubscribe linux-kernel" in
> > > > the body of a message to
> > [email protected]
> > > > More majordomo info at
> > > > http://vger.kernel.org/majordomo-info.html
> > > > Please read the FAQ at
> http://www.tux.org/lkml/
> > > >
> > >
> > >
> > > Manomugdha Biswas
> > >
> > >
> > >
> > >
> >
>
__________________________________________________________
> > > Yahoo! India Matrimony: Find your partner now.
> Go
> > to http://yahoo.shaadi.com
> > >
> >
> >
> > --
> > - Gaurav
> > my blog: http://lkdp.blogspot.com/
> > --
> >
>
>
> Manomugdha Biswas
>
>
>
>
__________________________________________________________
>
> Yahoo! India Matrimony: Find your partner now. Go to
> http://yahoo.shaadi.com
>
Manomugdha Biswas
__________________________________________________________
Yahoo! India Matrimony: Find your partner now. Go to http://yahoo.shaadi.com
manomugdha biswas wrote:
> Hi,
> I have a kernel module (kernel 2.6) where I have
> opened multiple tcp connections. when there is no
> data
> i want my process to sleep. For that i have added
> the
> following code.
>
> /* Initialise the wait q head */
> init_waitqueue_head(&VNICClientWQHead);
>
> init_waitqueue_entry(&(currentMap->waitQ), current);
> add_wait_queue(currentMap->sock->sk->sk_sleep,
> &(currentMap->waitQ));
>
> /* here currentMap is a structure containing tcp
> conenction info for my module. There is a currentMap
> for each tcp connection */
>
> wait_event_interruptible_timeout(VNICClientWQHead,
> 0, HZ * 100000);
>
> I am not sure about the condition argument, 0.
The condition should be an expression that returns true when whatever
you are waiting for occurs - in this case when data is available. If you
put the condition as 0 it will never wake up.
Also, why the huge timeout? If you just want to sleep forever, use
regular wait_event_interruptible.
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from [email protected]
Home Page: http://www.roberthancock.com/
Hi,
wait_event_interruptible_timeout(VNICClientWQHead,
<condition>, HZ *
100000);
I want to use this function to sleep my process when
there is no activity. But when some data arrives on
socket this function should wake up. I have declared a
wait queue as VNICClientWQHead. So what will be the
condtion here to wake up the process when data is
available on sockets? I have multiple sockets.
Regards,
Mano
Regards,
Mano
>
> >
> >
> >
> >
> > --- Gaurav Dhiman <[email protected]> wrote:
> >
> > > On 9/13/05, manomugdha biswas
> > > <[email protected]> wrote:
> > > > Hi,
> > > > I am using the this function in the following
> > way:
> > >
> > > you are using it wrong way ....
> > >
> > > >
> > > > wait_queue_head_t VNICClientWQHead;
> > > >
> > > > /* Initialise the wait q head */
> > > > init_waitqueue_head(&VNICClientWQHead);
> > > >
> > > > init_waitqueue_entry(&waitQ, current);
> > > > add_wait_queue(sock->sk->sk_sleep, waitQ));
> > >
> > > need not to do this at all, as all this is done
> by
> > > wait_event_interruptible_timepout() function.
> Just
> > > here you initialize
> > > the head of the list.
> > >
> > > >
> > > > /*
> > > > my code, it reads data from socket
> > > > */
> > > >
> > > >
> > wait_event_interruptible_timeout(VNICClientWQHead,
> > > 0,
> > > > HZ * 100000);
> > > >
> > > > if no activity is to be done then this process
> > > sleeps.
> > > > When some data comes in socket i.e socket
> > becomes
> > > > readable this process should wake up. In
> kernel
> > > 2.4 it
> > > > was working fine using
> > > interruptible_sleep_on_time().
> > > > But it is not working in kernel 2.6 even if
> data
> > > > arrives in socket! The sleeping process never
> > wake
> > > up.
> > > > Could you please tell me what is the problem?
> > > >
> > > > Regards,
> > > > Mano
> > > >
> > > >
> > > > --- Gaurav Dhiman <[email protected]>
> wrote:
> > > >
> > > > > On 9/13/05, manomugdha biswas
> > > > > <[email protected]> wrote:
> > > > > > Hi,
> > > > > > I was using
> interruptible_sleep_on_timeout()
> > > in
> > > > > kernel
> > > > > > 2.4. In kernel 2.6 I have use
> > > > > > wait_event_interruptible_timeout. But it
> is
> > > now
> > > > > > working!!.
> interruptible_sleep_on_timeout()
> > > was
> > > > > > working fine. Could anyone please help me
> in
> > > this
> > > > > > regard.
> > > > >
> > > > > What problem are you facing with
> > > > > wait_event_interruptible_timeout() in 2.6
> > > > > Elaborate more on it.
> > > > >
> > > > > -Gaurav
> > > > >
> > > > > > Regards,
> > > > > > Mano
> > > > > >
> > > > > > Manomugdha Biswas
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
__________________________________________________________
> > > > > > Yahoo! India Matrimony: Find your partner
> > now.
> > > Go
> > > > > to http://yahoo.shaadi.com
> > > > > > -
> > > > > > To unsubscribe from this list: send the
> line
> > > > > "unsubscribe linux-kernel" in
> > > > > > the body of a message to
> > > [email protected]
> > > > > > More majordomo info at
> > > > > http://vger.kernel.org/majordomo-info.html
> > > > > > Please read the FAQ at
> > > http://www.tux.org/lkml/
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > - Gaurav
> > > > > my blog: http://lkdp.blogspot.com/
> > > > > --
> > > > > -
> > > > > To unsubscribe from this list: send the line
> > > > > "unsubscribe linux-kernel" in
> > > > > the body of a message to
> > > [email protected]
> > > > > More majordomo info at
> > > > > http://vger.kernel.org/majordomo-info.html
> > > > > Please read the FAQ at
> > http://www.tux.org/lkml/
> > > > >
> > > >
> > > >
> > > > Manomugdha Biswas
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
__________________________________________________________
> > > > Yahoo! India Matrimony: Find your partner now.
> > Go
> > > to http://yahoo.shaadi.com
> > > >
> > >
> > >
> > > --
> > > - Gaurav
> > > my blog: http://lkdp.blogspot.com/
> > > --
> > >
> >
> >
> > Manomugdha Biswas
> >
> >
> >
> >
>
__________________________________________________________
> >
> > Yahoo! India Matrimony: Find your partner now. Go
> to
>
=== message truncated ===
Manomugdha Biswas
__________________________________________________________
Yahoo! India Matrimony: Find your partner now. Go to http://yahoo.shaadi.com
On 9/14/05, Robert Hancock <[email protected]> wrote:
> manomugdha biswas wrote:
> > Hi,
> > I have a kernel module (kernel 2.6) where I have
> > opened multiple tcp connections. when there is no
> > data
> > i want my process to sleep. For that i have added
> > the
> > following code.
> >
> > /* Initialise the wait q head */
> > init_waitqueue_head(&VNICClientWQHead);
> >
> > init_waitqueue_entry(&(currentMap->waitQ), current);
> > add_wait_queue(currentMap->sock->sk->sk_sleep,
> > &(currentMap->waitQ));
> >
> > /* here currentMap is a structure containing tcp
> > conenction info for my module. There is a currentMap
> > for each tcp connection */
> >
> > wait_event_interruptible_timeout(VNICClientWQHead,
> > 0, HZ * 100000);
> >
> > I am not sure about the condition argument, 0.
>
> The condition should be an expression that returns true when whatever
> you are waiting for occurs - in this case when data is available. If you
> put the condition as 0 it will never wake up.
On timeout it will wake up, even if the condition is 0 ..... bu in
this case the time out is too big. Try with small timeout value and
you will see that your process wakes up.
-Gaurav
>
> Also, why the huge timeout? If you just want to sleep forever, use
> regular wait_event_interruptible.
>
> --
> Robert Hancock Saskatoon, SK, Canada
> To email, remove "nospam" from [email protected]
> Home Page: http://www.roberthancock.com/
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
--
- Gaurav
my blog: http://lkdp.blogspot.com/
--