[dpdk-dev] [PATCH v5 2/2] build: add meson options of max_memseg_lists

[Thomas Monjalon]

14/10/2021 10:25, Bruce Richardson:
> On Thu, Oct 14, 2021 at 04:54:19AM +0800, Kefu Chai wrote:
> > RTE_MAX_MEMSEG_LISTS = 128 is not enough for many-core machines, in our
> > case, we need to increase it to 8192. so add an option so user can
> > override it.
> > 
> > Signed-off-by: Kefu Chai <tchaikov at gmail.com>
> 
> This seems a very low-level option to be exposing to the user. Some
> thoughts/questions:
> 
> - can you give some more detail on why you need such a massive number, 64
>   times the default?
> - what would be the impact of increasing the default to 8192? I assume this
>   is only used in a few places in EAL, so would the memory footprint
>   increase be large?
> - rather than a single specified value, would an alternative be to make
>   this be a computed value at config time, scaled by number of lcores (or
>   number of numa nodes)?

+1 for these suggestions