[PATCH 2/2] Document the M_ARENA_* mallopt parameters

[Siddhesh Poyarekar]

On Wednesday 26 October 2016 03:25 AM, DJ Delorie wrote:
> Siddhesh Poyarekar <siddhesh@sourceware.org> writes:
>> -/*  Non public mallopt parameters.  */
>>  #define M_ARENA_TEST -7
>>  #define M_ARENA_MAX  -8
> 
> Hmmm... if these are now public, do they need to be moved elsewhere?
> Like, malloc.h ?

They're already there in malloc.h.  I'll push a follow-up patch if they
can be removed.

>> +The presence of multiple @code{arenas} allows multiple threads to allocate
>> +memory simultaneously in their own separate arenas, thus improving performance.
> 
> Not quite true - there isn't one arena per thread, there are N arenas
> per M threads.  Probably better to say "... simultaneously in separate
> arenas ..."

OK.

>> +environment variable @code{MALLOC_ARENA_TEST} to the desired value.
>> +@item M_ARENA_MAX
> 
> Missing blank line.
> 
> Otherwise, the content looks OK to me from a technical point of view.

Thanks, I'll fix up formatting comments from Rical and push this.

Siddhesh