Re: [Lse-tech] Re: CPU affinity & IPI latency

[Davide Libenzi]

On 13-Jul-2001 Shailabh Nagar wrote:
> That is true to an extent. It would be convenient for us as scheduler
> rewriters to have neatly differentiated classes like UP, SMP, BIG_SMP, NUMA
> etc. But it forces all other scheduler-sensitive code to think of each of
> these cases separately and is exactly the reason why #ifdef's are
> discouraged for critical kernel code like the scheduler.

Personally I hate #ifdef's inside the code more than my cat water, but something
like :

[sched.c]
#ifdef CONFIG_SCHED_XXX
#include "sched_xxx.c"
#else
#ifdef CONFIG_SCHED_YYY
#include "sched_yyy.c"

...

#endif

looks pretty clean to me.

- Davide