<p dir="ltr">So I was just thinking about if i did this i can close apps that is running and user don't use them.. </p>
<div class="gmail_quote">On 4 Jun 2015 14:59, "Nicholas Krause" <<a href="mailto:xerofoify@gmail.com">xerofoify@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
<br>
On June 4, 2015 7:56:30 AM EDT, Mustafa Hussain <<a href="mailto:mustafa.hussain93@gmail.com">mustafa.hussain93@gmail.com</a>> wrote:<br>
>All i am trying to do is to detect idle task and remove it from the<br>
>running<br>
>queue or deactivate it.<br>
There is no reason for that. The idle tasks are only ever scheduled when<br>
there is no other processes able to<br>
run. So trying to remove them is a<br>
bad idea.<br>
Nick<br>
>Thank you for your patience :)<br>
>On 4 Jun 2015 14:51, "Nicholas Krause" <<a href="mailto:xerofoify@gmail.com">xerofoify@gmail.com</a>> wrote:<br>
><br>
>><br>
>><br>
>> On June 4, 2015 3:35:25 AM EDT, Mustafa Hussain <<br>
>> <a href="mailto:mustafa.hussain93@gmail.com">mustafa.hussain93@gmail.com</a>> wrote:<br>
>> >System crashes, system can not start<br>
>> ><br>
>> I was not thinking and this schedules the idle thread. What are you<br>
>trying<br>
>> to accomplish through.<br>
>> Nick<br>
>> ><br>
>> >On June 3, 2015 9:41:52 PM EDT, Mustafa Hussain<br>
>> ><<a href="mailto:mustafa.hussain93@gmail.com">mustafa.hussain93@gmail.com</a>><br>
>> >wrote:<br>
>> >>i want to dequeue the idle task how can i do this ?<br>
>> >Why there is no point. Clearly your asking questions in order to<br>
>learn<br>
>> >the<br>
>> >scheduler.<br>
>> >If your interested in learning it I can help but, you need to<br>
>think<br>
>> >about<br>
>> >what you<br>
>> > trying to accomplish first.<br>
>> >Nick<br>
>> ><br>
>> >>On Thu, Jun 4, 2015 at 3:40 AM, Mustafa Hussain<br>
>> >><<a href="mailto:mustafa.hussain93@gmail.com">mustafa.hussain93@gmail.com</a><br>
>> >>> wrote:<br>
>> >><br>
>> >>> Hi nick,<br>
>> >>> i applied your suggested edit and i got "bad: scheduling from the<br>
>> >>idle<br>
>> >>> thread!"<br>
>> >>> how can i solve this ?<br>
>> >>><br>
>> >>> On Wed, Jun 3, 2015 at 12:29 AM, nick <<a href="mailto:xerofoify@gmail.com">xerofoify@gmail.com</a>><br>
>wrote:<br>
>> >>><br>
>> >>>><br>
>> >>>><br>
>> >>>> On 2015-06-02 06:25 PM, <a href="mailto:Valdis.Kletnieks@vt.edu">Valdis.Kletnieks@vt.edu</a> wrote:<br>
>> >>>> > On Tue, 02 Jun 2015 23:38:48 +0200, Mustafa Hussain said:<br>
>> >>>> ><br>
>> >>>> >>> /*Check if the pointer pointing to the idle class is equal<br>
>to<br>
>> >>prev's<br>
>> >>>> >>> sched_class*/<br>
>> >>>> >>> if(prev->sched_class == idle)<br>
>> >>>> >>> After this condition you can just:<br>
>> >>>> >>> printk(KERN_INFO "Prev is equal to idle_sched_class,now<br>
>running<br>
>> >>the<br>
>> >>>> idle<br>
>> >>>> >>> sched_class\n");<br>
>> >>>> ><br>
>> >>>> > Hopefully, you didn't take Nick's advice without thinking<br>
>about<br>
>> >>it....<br>
>> >>>> ><br>
>> >>>> > As I type this, powertop tells me:<br>
>> >>>> ><br>
>> >>>> > Summary: 821.8 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS<br>
>> >>ops/sec<br>
>> >>>> and 18.8% CPU use<br>
>> >>>> ><br>
>> >>>> > That printk is going to spam your dmesg pretty hard.<br>
>> >>>> ><br>
>> >>>> > A better question is:<br>
>> >>>> ><br>
>> >>>> > If prev is about to go idle, *what do you want to do*? (Hint:<br>
>> >>newer<br>
>> >>>> > kernels already do a bunch of stuff when a cpu/core goes idle,<br>
>> >you<br>
>> >>>> > probably want to make sure you're not working against<br>
>something<br>
>> >>here...)<br>
>> >>>> ><br>
>> >>>> I didn't account for rate limiting the debug messages, forgot<br>
>about<br>
>> >>that<br>
>> >>>> . :)<br>
>> >>>> I do agree his question is not the best but he wanted a answer<br>
>so I<br>
>> >>>> decided<br>
>> >>>> to just give him a answer that works for his learning.<br>
>> >>>> Nick<br>
>> >>>><br>
>> >>><br>
>> >>><br>
>> ><br>
>> >--<br>
>> >Sent from my Android device with K-9 Mail. Please excuse my brevity.<br>
>><br>
>> --<br>
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.<br>
>><br>
<br>
--<br>
Sent from my Android device with K-9 Mail. Please excuse my brevity.<br>
</blockquote></div>