On Fri, Jul 03, 2020 at 11:29:25PM +0000, Chaitanya Kulkarni wrote:
> Christoph,
>
> On 6/29/20 4:44 PM, Chaitanya Kulkarni wrote:
> > Get rid of the wrapper for trace_block_rq_insert() and call the function
> > directly.
> >
> > Signed-off-by: Chaitanya Kulkarni<chaitanya.kulkarni@xxxxxxx>
> > ---
>
> Can we re-consider adding this patch ? here are couple of reasons:-
>
> 1. Increase in the size of the text region of the object file:-
>
> By adding the trace header #include <trace/events/block.h>
> in io-scheduler where it is calling trace_block_rq_insert()
> increases the size of the text region of the object file
> kyber(+215) & bfq (+317) [1].
You really shouldn't have both loaded, never mind used at the same
time. It also avoid a function call for the scheduler fast path.
> 2. Mandatory io-sched built-in kernel compilation:-
>
> When testing with a different io-sched KConfig options ("*" vs "M"),
> when kyber and bfq compilation option set to "M" having this patch
> reports error[2].
See EXPORT_TRACEPOINT_SYMBOL_GPL.
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