On Wed, 01 Jun 2011 07:19:29 +0200, SK <sk at metrokings.com> wrote:

> On Sat, May 28, 2011 at 6:41 PM, David Simcha <dsimcha at gmail.com> wrote:
>
>> Thanks for letting me know.  I have no idea why this is happening.  I
>> was
>> seeing some weirdness on FreeBSD only, but I gave up trying to solve
>> that
>> until the FreeBSD port is more stable or I can reproduce it on some
>> other
>> OS.
>>
>
> I have test case that reliably segfaults on 64-bit Fedora 14.  I can
> trim it
> down to the minimal failing case if you're interested.  The particular
> problem I observe occurs when trying to spread many fibers over more than
> one thread.
>
> Regards,
> -steve

Fiber multiplexing is actually broken on POSIX. It uses a global shared
ucontext_t.
You may want to have a look at
https://github.com/dawgfoto/druntime/commits/FiberFixes

martin

On Jun 1, 2011, at 11:30 AM, Martin Nowak wrote:
> 
> Fiber multiplexing is actually broken on POSIX. It uses a global shared ucontext_t. You may want to have a look at https://github.com/dawgfoto/druntime/commits/FiberFixes

Oops!  Though the ucontext_t form of context switching shouldn't be used on most platforms right now (at least with -m32 set).

On Wed, Jun 1, 2011 at 11:30 AM, Martin Nowak <dawg at dawgfoto.de> wrote:

>
> Fiber multiplexing is actually broken on POSIX. It uses a global shared
> ucontext_t.
> You may want to have a look at
> https://github.com/dawgfoto/druntime/commits/FiberFixes
>
> martin
>
>
Thanks Martin.  I assume the FiberFixes branch is not merged with the mainline druntime.  Why is that?
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Merged and then removed because the unittests were failing with an out of memory error.

Sent from my iPhone

On Jun 1, 2011, at 7:16 PM, SK <sk at metrokings.com> wrote:

> 
> 
> On Wed, Jun 1, 2011 at 11:30 AM, Martin Nowak <dawg at dawgfoto.de> wrote:
> 
> Fiber multiplexing is actually broken on POSIX. It uses a global shared ucontext_t. You may want to have a look at https://github.com/dawgfoto/druntime/commits/FiberFixes
> 
> martin
> 
> 
> Thanks Martin.  I assume the FiberFixes branch is not merged with the mainline druntime.  Why is that?
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