Mukesh Kumar Chaurasiya writes:
> This is a syscall only implementation of generic entry/exit framework
> for framework for ppc. IRQ handling is not done in this RFC.
>
> This will break the ppc32 build as of now which will be fixed along with
> IRQ handling.
>
> Below are the performance bench
Ankur Arora writes:
> Mukesh Kumar Chaurasiya writes:
>
>> This is a syscall only implementation of generic entry/exit framework
>> for framework for ppc. IRQ handling is not done in this RFC.
>>
>> This will break the ppc32 build as of now which will be fi
Shrikanth Hegde writes:
> Large user copy_to/from (more than 16 bytes) uses vmx instructions to
> speed things up. Once the copy is done, it makes sense to try schedule
> as soon as possible for preemptible kernels. So do this for
> preempt=full/lazy and rt kernel.
Note that this check will al
Shrikanth Hegde writes:
> On 11/9/24 22:24, Shrikanth Hegde wrote:
>>
>> On 11/9/24 00:36, Ankur Arora wrote:
>>>
>>> Shrikanth Hegde writes:
>>>
>>>> Define preempt lazy bit for Powerpc. Use bit 9 which is free and within
>>>&g
Shrikanth Hegde writes:
> Define preempt lazy bit for Powerpc. Use bit 9 which is free and within
> 16 bit range of NEED_RESCHED, so compiler can issue single andi.
>
> Since Powerpc doesn't use the generic entry/exit, add lazy check at exit
> to user. CONFIG_PREEMPTION is defined for lazy/full
