Re: [PATCH] swapcontext vs libpthread, round 9

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> On Thu, Sep 06, 2012 at 03:26:13AM +0000, YAMAMOTO Takashi wrote:
>> hi,
>> 
>> > On Fri, Aug 31, 2012 at 04:45:48PM +0000, Emmanuel Dreyfus wrote:
>> >> After a few round behind the scenes with portmasters (Hi Nick, hi 
>> >> Martin!),
>> >> here is the latest incarnation of swpacontext vs libpthread patch.
>> >> 
>> >> If there are no concerns left, I plan to commit within 2 days.
>> > 
>> > I still object to adding _UC_TLSBASE to ports that don't need it. This
>> > can be done entire in userland, so no kernel change should be required
>> > or done.
>> > 
>> > Joerg
>> 
>> can you elaborate a bit more?
>> 
>> implement the entire setcontext in userland where possible?
>> 
>> or something like the following?
>> 
>>      setcontext(ucp)
>>      {
>>      #ifdef(__i386__)
>>              ucp->uc_mcontext._mc_tlsbase = __lwp_getprivate_fast();
>>      #else
>>              ...
>>      #endif
>>              return sys_setcontext(ucp);
>>      }
> 
> The latter, essentially.

i like it if possible as it's consistent with _lwp_makecontext.

YAMAMOTO Takashi

> 
> Joerg